// API callback
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CircuitsTune"},"subtitle":{"type":"html","$t":"A birth place of electronic schematic circuit diagram"},"link":[{"rel":"http://schemas.google.com/g/2005#feed","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/posts\/default"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/-\/Fun+Circuit?alt=json-in-script\u0026max-results=6"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/search\/label\/Fun%20Circuit"},{"rel":"hub","href":"http://pubsubhubbub.appspot.com/"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"generator":{"version":"7.00","uri":"http://www.blogger.com","$t":"Blogger"},"openSearch$totalResults":{"$t":"6"},"openSearch$startIndex":{"$t":"1"},"openSearch$itemsPerPage":{"$t":"6"},"entry":[{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-684213009615044292"},"published":{"$t":"2013-02-20T00:38:00.000+06:00"},"updated":{"$t":"2013-02-20T00:46:13.281+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"FM Transmitter"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Hobby Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"MIC"},{"scheme":"http://www.blogger.com/atom/ns#","term":"S9014"}],"title":{"type":"text","$t":"Simple FM Transmitter Circuit Schematic "},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cimg border=\"0\" height=\"132\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEint1wmBjkpCsz2YIg7Xp5DAYF0usi0NG1JWvH39EZdfND0kh_cwbU7RjLPnOQw_4UEOC2769PCxZHY0Q_zJ27SYyCXn38FcfgHzvhThWOdC14Zw01Uw66AthFVivaVAlzZDUlnv4u6gEg\/s320\/fm-transmitter.jpg\" style=\"clear: left; float: left; margin-bottom: 1em; margin-right: 1em;\" width=\"320\" \/\u003E\u003C\/div\u003E\nThis is a simplest FM transmitter circuit schematic with a single transistor. It build with a very few numbers of components include a transistor, few capacitors, resistors and a small microphone. \u003Cbr \/\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003Cbr \/\u003E\n\u003Cdiv style=\"clear: both;\"\u003E\n\u003Ch3 style=\"text-align: left;\"\u003E\nCircuit Diagram\u0026nbsp;\u003C\/h3\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEi-_Xu3CjRlcqFuq8Po5NgR3R0qf8hm4ufCwuBE-VjFtjzIP8kQKkVG3OTpGNe2UzPPnNrIrqFVCXcmkDEPoepCrtJxJTxLDvfsfh6-qcnV028cPegf8WARpberEnfcCozHkEtQYksM_pI\/s1600\/50m-fm-transmitter-circuit.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg alt=\"simple-fm-transmitter\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEi-_Xu3CjRlcqFuq8Po5NgR3R0qf8hm4ufCwuBE-VjFtjzIP8kQKkVG3OTpGNe2UzPPnNrIrqFVCXcmkDEPoepCrtJxJTxLDvfsfh6-qcnV028cPegf8WARpberEnfcCozHkEtQYksM_pI\/s1600\/50m-fm-transmitter-circuit.jpg\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Ch3 style=\"text-align: left;\"\u003E\nCircuit Description \u003C\/h3\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\nA S9014 NPN transistor is used here; you can use BC547 as an alternative of it. All the capacitor used in circuit is \u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEixLS1L0VklneVzS5DsGXLxpl-PSkvlZ5o-cY9LPFqxfN2R5-gl4Nmwvj7HcprRPyliFpRQ3v9PE6xePbgaI0o0m2BFfjlBLjQOo6Q9VQmPyVAoo76kRfuCKjwuxFEh3Ai9RSefYmIB7QM\/s1600\/Ceramic-Capacitors.jpg\" target=\"_blank\"\u003Eceramic capacitor\u003C\/a\u003E. Don’t be surprised with the supply voltage of 1.5 volt. Here you can use a single 1.5V AA battery cell, or a 3V battery that will be endurable for this this FM transmitter circuit. A small microphone used here is an electret condenser type microphone (see below). Must use at least a small antenna for a higher transmitting-range. Then try with a bigger antenna for increasing range.\u0026nbsp;\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Ch4 style=\"text-align: left;\"\u003E\nTransistor S9014 Pinout \u003C\/h4\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiiXB5gkQs7YZQcdxGB-SSLF3Vh0wyQPyaJjagn05zAh3Ee6VkV_qGKQjuuHh6iYG_00JG1LOGoT56au-fptHwaUp4IpZdTuWji2ha1dAcXIN32M2HiiRcvdKQO-P8oQozlc0hOmfaOuSE\/s1600\/s9014-pinout.png\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg alt=\"S9014 Pinout \" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiiXB5gkQs7YZQcdxGB-SSLF3Vh0wyQPyaJjagn05zAh3Ee6VkV_qGKQjuuHh6iYG_00JG1LOGoT56au-fptHwaUp4IpZdTuWji2ha1dAcXIN32M2HiiRcvdKQO-P8oQozlc0hOmfaOuSE\/s1600\/s9014-pinout.png\" title=\"\" \/\u003E\u003C\/a\u003E \u003C\/div\u003E\n\u003Ch4 style=\"text-align: left;\"\u003E\nElectret condenser type microphone\u003C\/h4\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhpyk0U4UCBJEtwVZOEJudblJEmUBChn0TdB-OwC_mqQwXUr-zSRPocu9QqjIkZhZN1G8PKZqbWuhd9O3kpk7tY3i99uSDWWTMsuZrDPnssH5IQpIYE_AVos3_mikIL0MaAOwCdpOYJoz0\/s1600\/Electret_condenser_microphone-1.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg alt=\"Electret condenser microphone\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhpyk0U4UCBJEtwVZOEJudblJEmUBChn0TdB-OwC_mqQwXUr-zSRPocu9QqjIkZhZN1G8PKZqbWuhd9O3kpk7tY3i99uSDWWTMsuZrDPnssH5IQpIYE_AVos3_mikIL0MaAOwCdpOYJoz0\/s1600\/Electret_condenser_microphone-1.jpg\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\nIf you have any confusion about capacitor value, check \u003Ca href=\"http:\/\/beamdream.solarbotics.net\/Tutorials\/CapGuide.htm\" rel=\"nofollow\" target=\"_blank\"\u003Ethis\u003C\/a\u003E.\u003C\/div\u003E\n\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/684213009615044292\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2013\/02\/simple-fm-transmitter-circuit-schematic.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/684213009615044292"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/684213009615044292"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2013\/02\/simple-fm-transmitter-circuit-schematic.html","title":"Simple FM Transmitter Circuit Schematic "}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEint1wmBjkpCsz2YIg7Xp5DAYF0usi0NG1JWvH39EZdfND0kh_cwbU7RjLPnOQw_4UEOC2769PCxZHY0Q_zJ27SYyCXn38FcfgHzvhThWOdC14Zw01Uw66AthFVivaVAlzZDUlnv4u6gEg\/s72-c\/fm-transmitter.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-3966421916074776601"},"published":{"$t":"2013-02-11T21:20:00.000+06:00"},"updated":{"$t":"2015-05-16T13:31:38.972+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"12V"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Automotive"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Basic Electronics"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC368"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC548"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Controller Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Detector"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Lighting Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Relay Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Sensor"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Switch"}],"title":{"type":"text","$t":"Clap Switch Circuit Diagram Project"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiwkhz_6SGE85_C11GKf9myYYigQgVN5bDTukk-uTJRX7fEm4y0oIGrrecO2vzf8x-jYqgLw_8ljOFZXgnu25DLgMgP2sUnfF40DJC4V9MHmXPp2HGJiOT_C0acPKicWMedV879V6DfRcc\/s1600\/clap-switch.jpg\" imageanchor=\"1\" style=\"clear: left; float: left; margin-bottom: 1em; margin-right: 1em;\" target=\"_blank\"\u003E\u003Cimg border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiwkhz_6SGE85_C11GKf9myYYigQgVN5bDTukk-uTJRX7fEm4y0oIGrrecO2vzf8x-jYqgLw_8ljOFZXgnu25DLgMgP2sUnfF40DJC4V9MHmXPp2HGJiOT_C0acPKicWMedV879V6DfRcc\/s1600\/clap-switch.jpg\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\nThis is a simple \u003Cb\u003Eclap switch circuit diagram project\u003C\/b\u003E. If you are a beginner electronics learner, and love to do new project experiment then this is a great circuit for you.\u0026nbsp; This circuit can on\/off a 220V electronic device like fan, lamp by the sound of clap. \u003Cbr \/\u003E\n\u003Ch3 style=\"clear: both; text-align: left;\"\u003E\nCircuit diagram of clap switch\u003C\/h3\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEimAzf280nSxH4WEtH98BA0QkjcaennIH4J8Ccy2nDI1lZVB_OrpzMBn2wDPWXf-x2Kc1gF6RWC80AcdvK2udecQQXma6gzsXodLE6hxstEqzph9nQLhMLwbR32Qo8lH9objC0erInqjcg\/s1600\/clap-switch-circuit.jpg\" target=\"_blank\"\u003E\u003Cimg alt=\"clap-switch\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgPArBw6FVnP22KnjtJ-6oWGM9oZOxLFCyqxdOCEvLA5g5y4OhGlnKKD8BhryVsUjPs7KiTfyG9MX29Tb8lyFLH5_v1qwMX9sUVt3bKEpsKF6B4SVzHgMG_oA3BSPu5AEs2S8JzAKtWRz8\/s1600\/clap-switch-circuit.png\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Ch3 style=\"text-align: left;\"\u003E\nWatch The Video Of Clap Switch Circuit Diagram Project\u003C\/h3\u003E\n\u003Cbr \/\u003E\n\u003Ccenter\u003E\n\u003Ciframe allowfullscreen=\"\" frameborder=\"0\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/nrwnFT8ZDNs\" width=\"420\"\u003E\u003C\/iframe\u003E\n\u003C\/center\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ch4 style=\"text-align: left;\"\u003E\nCircuit Description\u003C\/h4\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\nAs shown in the circuit a very few number of parts is used including relay, transformer, condenser microphone, few transistor, a lamp etc. Lamp is used as a testing device; here another device could be use like fan, \u003Ca href=\"http:\/\/www.circuitstune.com\/2012\/02\/music-generator-circuit-using-um66-ic.html\" target=\"_blank\"\u003Ecalling bell\u003C\/a\u003E, radio etc. \u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\nThe basic principle applied in this circuit:\u0026nbsp;\u003C\/div\u003E\n\u003Cblockquote class=\"tr_bq\"\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Ci\u003E“Clap sound is being converted into electrical signal and a relay gets triggered from it and controls the load.”\u003C\/i\u003E\u003C\/div\u003E\n\u003C\/blockquote\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\nA small microphone (MIC) detects the clap sound and converts into electrical signal. Which is amplified by Q1 (here Q1 used as a common emitter amplifier). Amplified signal goes into the Bistable Multivibrator section made by two transistors Q2 and Q3.\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\nWhen we apply a trigger to the Bistable Multivibrator circuit with a clap sound then, if Q2 is on, Q3 gets switched off. Thus, the circuit remains stable in a single state continuously. At the moment if we trigger with another clap sound the two states will flip-flop with Q2 switched off and Q3 switched on. The circuit will remain stable continuously until we apply the next trigger.\u003C\/div\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\n\u003Cbr \/\u003E\nRelay gets triggered from the output of current-amplifier (Q4) which is used to amplify the flip-flop signal. Relay is kind of electromagnetic switch, which is used to controlling other high voltage (AC) electrical appliance (Load in our circuit) with this low voltage (DC) clap switch.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Ch3 style=\"text-align: left;\"\u003E\nPart List:\u003C\/h3\u003E\n\u003Cdiv style=\"text-align: left;\"\u003E\nR1 = 15KΩ Resistor\u003Cbr \/\u003E\nR2, R11, R12 = 2.2MΩ Resistor\u003Cbr \/\u003E\nR3 = 270KΩ, R4 = 3.3KΩ Resistor\u003Cbr \/\u003E\nR5, R6 = 1.5KΩ Resistor\u003Cbr \/\u003E\nR13 = 2.2KΩ Resistor\u003Cbr \/\u003E\nR3 = 270KΩ Resistor\u003Cbr \/\u003E\nR4 = 3.3KΩ Resistor\u003Cbr \/\u003E\nR7, R8 = 10KΩ Resistor\u003Cbr \/\u003E\nR9, R10 = 27KΩ Resistor\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nC1 = 1000µf\/16v Capacitor\u003Cbr \/\u003E\nC2 = .01µf Capacitor \u003Cbr \/\u003E\nC3, C4 = .047µf Capacitor\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nQ1, Q2, Q3 = BC548 Transistor\u003Cbr \/\u003E\nQ4 = BC368 Transistor\u003Cbr \/\u003E\nD2, D3, D4 = IN 4148 Diode\u003Cbr \/\u003E\nD1, D5 = IN 4007 Diode\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nMIC = Condenser Microphone\u003Cbr \/\u003E\nRLY = 12V Relay \u003Cbr \/\u003E\nLoad = AC 220V Bulb or Fan\u003Cbr \/\u003E\nTx = 12v\/0.5A Transformer\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ch4 style=\"text-align: left;\"\u003E\n12V\/5-Pin Relay Pinout\u003C\/h4\u003E\n\u003Cdiv style=\"text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjY6QO3ATk1ZftJTZAxD_dqJP_OFow1UqxhlWC6UKXSxuy-9M_b9W1UfqZ8xnAjHKzfgoKRb8Pv7wxdWrL23Ga9BH38deJzHzJXGmSEirYTFF1Tmykebz3AsnzadS1Ih9f_VCadikDRNBE\/s1600\/12v-5pin-relay-pinout.png\" style=\"margin-left: 0; margin-right: 0;\" target=\"_blank\"\u003E\u003Cimg alt=\"12v-5-pin-relay-connection\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjY6QO3ATk1ZftJTZAxD_dqJP_OFow1UqxhlWC6UKXSxuy-9M_b9W1UfqZ8xnAjHKzfgoKRb8Pv7wxdWrL23Ga9BH38deJzHzJXGmSEirYTFF1Tmykebz3AsnzadS1Ih9f_VCadikDRNBE\/s1600\/12v-5pin-relay-pinout.png\" title=\"\" \/\u003E\u003C\/a\u003E \u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Ch4 style=\"text-align: left;\"\u003E\nBC548 and BC368 Transistor Pinout\u003C\/h4\u003E\n\u003Cdiv style=\"float: left; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgTgeyEbQdHzqqcMG8Ca_uSp2aIdIMORN4v-EclNFQTQEAeJttb_GptmDztC7WRh0HuuePqlOcdD7fzQrpV620JoJPiKWzRbakQWdtbIaPzw8NBhGkdlwnKBpGRrgt42avHyoTPJcGAL-E\/s1600\/bc548-pinout.jpg\" style=\"float: left; margin-bottom: 1em; margin-right: 0;\" target=\"_blank\"\u003E\u003Cimg alt=\"bc548-pin\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgTgeyEbQdHzqqcMG8Ca_uSp2aIdIMORN4v-EclNFQTQEAeJttb_GptmDztC7WRh0HuuePqlOcdD7fzQrpV620JoJPiKWzRbakQWdtbIaPzw8NBhGkdlwnKBpGRrgt42avHyoTPJcGAL-E\/s1600\/bc548-pinout.jpg\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhWX_6inKDq2PDbO8QuP8G-t7s-4rDlRaZhtXToBSTMJx98Tg-lbjalXb4VwVJRMQFpVSTK8pjVB0b40VER6Q0CGPSQjuWElfjXroe96GqgbeWN97hoMUDyD8pjde95v9q_PZ-wTFfdC7g\/s1600\/bc368-pinout.jpg\" style=\"margin-bottom: 1em; margin-right: 0;\" target=\"_blank\"\u003E\u003Cimg alt=\"bc368-pin\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhWX_6inKDq2PDbO8QuP8G-t7s-4rDlRaZhtXToBSTMJx98Tg-lbjalXb4VwVJRMQFpVSTK8pjVB0b40VER6Q0CGPSQjuWElfjXroe96GqgbeWN97hoMUDyD8pjde95v9q_PZ-wTFfdC7g\/s1600\/bc368-pinout.jpg\" title=\"\" \/\u003E\u003C\/a\u003E\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv style=\"clear: both;\"\u003E\n\u003Cb\u003EReference:\u003C\/b\u003E \u003Ca href=\"http:\/\/en.wikipedia.org\/wiki\/Multivibrator#Bistable_multivibrator_circuit\" rel=\"nofollow\" target=\"_blank\"\u003EBistable Multivibrator \u003C\/a\u003E[wikipedia]\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/3966421916074776601\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2013\/02\/clap-switch-circuit-with-onoff-220v.html#comment-form","title":"3 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/3966421916074776601"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/3966421916074776601"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2013\/02\/clap-switch-circuit-with-onoff-220v.html","title":"Clap Switch Circuit Diagram Project"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiwkhz_6SGE85_C11GKf9myYYigQgVN5bDTukk-uTJRX7fEm4y0oIGrrecO2vzf8x-jYqgLw_8ljOFZXgnu25DLgMgP2sUnfF40DJC4V9MHmXPp2HGJiOT_C0acPKicWMedV879V6DfRcc\/s72-c\/clap-switch.jpg","height":"72","width":"72"},"thr$total":{"$t":"3"}},{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-2182013277377030894"},"published":{"$t":"2012-12-22T13:57:00.000+06:00"},"updated":{"$t":"2012-12-25T11:25:47.303+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"2N825"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Alarm Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC107"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC168"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC547"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC548"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Car Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"IC555"},{"scheme":"http://www.blogger.com/atom/ns#","term":"LM555"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Motorcycle Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"NE555"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Rain Alarm Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Sensor Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Transistor Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Water Detector"}],"title":{"type":"text","$t":"Water Sensor Circuit Diagram using IC 555"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\nThis is a water sensor \/rain alarm circuit diagram; it can be used on motorcycle, car or other device that we want to protect from water, rain. \u003Cbr \/\u003E\nThis is a simple water sensor\/rain alarm circuit that makes an alarm when water\/rain falls on its sensor. This circuit is based on NE555\/LM555 IC and two transistors (Q1\u0026amp;Q2). For\u0026nbsp; transistor Q1- BC547 or BC107 and for Q2-\u0026nbsp; 2N825,BC548 or BC168 can be used in the circuit. This rain detector circuit can be supplied from voltage source of +9V-12V DC. The resistor 470K ohm is a POT\/Variable resistor; it is used to adjust the sensitivity of water\/rain sensor. Use a 8 ohm,0.5w-1W\u0026nbsp; speaker to hearing\u0026nbsp; better alarm. Less than 8 ohm speaker could be harmful for the IC 555.\u003C\/div\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\n\u003Cb\u003E\u003Cbr \/\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\n\u003Cb\u003ECircuit Diagram of Water Sensor\u003Ci\u003E\u003Cbr \/\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiLVB0eLojnVUoOXW-_Fluxc3hLhCa4VA-gbWJesaNG7ocDVnqKEIfqM9dCaIAjqAX_duuhZ25DwmSJL4yRugBa16xjTiblrENtWajLmVv2PPnYyaxI7b07aNYyLBMRaoQb9EK2j3cMpY8\/s1600\/Water-Sensor-Rain-alarm-circuit-diagram.png\" imageanchor=\"1\" style=\"margin-left: auto; margin-right: auto;\"\u003E\u003Cimg border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiLVB0eLojnVUoOXW-_Fluxc3hLhCa4VA-gbWJesaNG7ocDVnqKEIfqM9dCaIAjqAX_duuhZ25DwmSJL4yRugBa16xjTiblrENtWajLmVv2PPnYyaxI7b07aNYyLBMRaoQb9EK2j3cMpY8\/s1600\/Water-Sensor-Rain-alarm-circuit-diagram.png\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig-1: \u003Cspan style=\"font-family: \u0026quot;Calibri\u0026quot;,\u0026quot;sans-serif\u0026quot;; font-size: 9pt; line-height: 115%;\"\u003EWater\nSensor\/Rain alarm circuit diagram\u003C\/span\u003E\u003C\/i\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003Ch4 style=\"text-align: left;\"\u003E\nWater sensor PCB layout:\u003C\/h4\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiFk5fQs0xWA67AML4GoF20Fpj6SQRE1NEdNN7viRaFix45ygWT9Qura_0Ex2KuGQnwaHSbfDNcasZi6vXKT-BMBnJFTEPprtqo_ImNTW8OEfZ_BNbRl_tieZl6jB4htUBDj1vwyenDhy8\/s1600\/Water-sensor-Rain-alarm-pcb-circuitstune.png\" imageanchor=\"1\" style=\"margin-left: auto; margin-right: auto;\"\u003E\u003Cimg border=\"0\" height=\"103\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiFk5fQs0xWA67AML4GoF20Fpj6SQRE1NEdNN7viRaFix45ygWT9Qura_0Ex2KuGQnwaHSbfDNcasZi6vXKT-BMBnJFTEPprtqo_ImNTW8OEfZ_BNbRl_tieZl6jB4htUBDj1vwyenDhy8\/s320\/Water-sensor-Rain-alarm-pcb-circuitstune.png\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig-2: PCB layout of water sensor\u003C\/i\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\nWe can make the water sensor as shown in the image (Fig-2) using aluminu\u003Cspan style=\"font-family: \u0026quot;Calibri\u0026quot;,\u0026quot;sans-serif\u0026quot;;\"\u003Em conductor like a naked wire \u003C\/span\u003E. Here can be used other conductor but we suggesting to use aluminum. \u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/2182013277377030894\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/01\/water-sensor-rain-alarm-circuit-555.html#comment-form","title":"3 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/2182013277377030894"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/2182013277377030894"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/01\/water-sensor-rain-alarm-circuit-555.html","title":"Water Sensor Circuit Diagram using IC 555"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiLVB0eLojnVUoOXW-_Fluxc3hLhCa4VA-gbWJesaNG7ocDVnqKEIfqM9dCaIAjqAX_duuhZ25DwmSJL4yRugBa16xjTiblrENtWajLmVv2PPnYyaxI7b07aNYyLBMRaoQb9EK2j3cMpY8\/s72-c\/Water-Sensor-Rain-alarm-circuit-diagram.png","height":"72","width":"72"},"thr$total":{"$t":"3"},"georss$featurename":{"$t":"Dhaka, Bangladesh"},"georss$point":{"$t":"23.709921 90.407143000000019"},"georss$box":{"$t":"23.596680000000003 90.312930500000022 23.823162 90.501355500000017"}},{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-2716859743285245670"},"published":{"$t":"2012-02-14T17:29:00.002+06:00"},"updated":{"$t":"2012-12-25T11:39:47.790+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"2N2646"},{"scheme":"http://www.blogger.com/atom/ns#","term":"CD4017"},{"scheme":"http://www.blogger.com/atom/ns#","term":"CMOS"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Frequency Based Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Insects Repeller"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Mosquito Repeller"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Pest Repeller"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Repeller"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Ultrasonic Circuit"}],"title":{"type":"text","$t":"Ultrasonic Mosquito Repeller Circuit Diagram by CD4017"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\nThis is a simple ultrasonic mosquito repeller circuit diagram. The circuit is design on the theory that pests like mosquito can be repelled by ultrasonic frequency around (20KHz-25KHz). This ultrasonic mosquito repeller circuit is based on a single CMOS IC CD4017. C1,R1 \u0026amp; VR1 is used to adjust the output frequency.\u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Cb\u003ECircuit Diagram:\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiiTike_s1dwVJMXiSM_u_MKZv0OG5Zc2YOfhzwpA5l8rY3EZAgHm-6Zr3PT2Q-KotFAEgI3iL96PyPHitzWIyDxjm3Ufz8TXbhiW_RX3CQ2F5-pko76va7xSEfUA0_7jdeAgfvIVNz0A0\/s1600\/Mosquito-repeller-circuit-diagram.png\" style=\"margin-left: auto; margin-right: auto;\"\u003E\u003Cimg alt=\"Ultrasonic Mosquito Repeller Schematic\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiiTike_s1dwVJMXiSM_u_MKZv0OG5Zc2YOfhzwpA5l8rY3EZAgHm-6Zr3PT2Q-KotFAEgI3iL96PyPHitzWIyDxjm3Ufz8TXbhiW_RX3CQ2F5-pko76va7xSEfUA0_7jdeAgfvIVNz0A0\/s1600\/Mosquito-repeller-circuit-diagram.png\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig: Ultrasonic mosquito repeller circuit diagram\u003C\/i\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/2716859743285245670\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/02\/ultrasonic-mosquito-repeller-circuit.html#comment-form","title":"2 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/2716859743285245670"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/2716859743285245670"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/02\/ultrasonic-mosquito-repeller-circuit.html","title":"Ultrasonic Mosquito Repeller Circuit Diagram by CD4017"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiiTike_s1dwVJMXiSM_u_MKZv0OG5Zc2YOfhzwpA5l8rY3EZAgHm-6Zr3PT2Q-KotFAEgI3iL96PyPHitzWIyDxjm3Ufz8TXbhiW_RX3CQ2F5-pko76va7xSEfUA0_7jdeAgfvIVNz0A0\/s72-c\/Mosquito-repeller-circuit-diagram.png","height":"72","width":"72"},"thr$total":{"$t":"2"},"georss$featurename":{"$t":"Dhaka, Bangladesh"},"georss$point":{"$t":"23.709921 90.407143000000019"},"georss$box":{"$t":"23.596680000000003 90.312930500000022 23.823162 90.501355500000017"}},{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-5465541019528622775"},"published":{"$t":"2012-02-02T00:28:00.004+06:00"},"updated":{"$t":"2012-12-25T11:29:20.631+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"2N2222"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Alarm"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC168"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC183"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC238"},{"scheme":"http://www.blogger.com/atom/ns#","term":"BC548"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Music Generator"},{"scheme":"http://www.blogger.com/atom/ns#","term":"UM66"}],"title":{"type":"text","$t":"Song-Music generator circuit using ic UM66"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\nThis is a simple (song) music generator circuit using ic UM66. To make a musical calling-bell, door-bell, kids toys etc. we can use this funny audio\/sound\/music\/tone generator ic UM66. The UM66 series are CMOS IC’s, they has a built in ROM to store the music. The IC operates in DC +3V. We suggest to use two dry cell (1.5V X 2) for +3V Supply.\u0026nbsp; For Q1 use a TO-92 type NPN transistor like BC548, BC168, BC183, BC238, 2N2222. Speaker must be 4Ω or higher.\u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Cb\u003ECircuit Diagram of Music generator using ic UM66:\u0026nbsp;\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhkjoS4M_qwyfwQpHe9iLDqSDYPyuMOZuy0mrSRYCHtWZYunDWN5QSyOLDOFsbaHfqIHgKPpOdNy-it68P8F2B_kyGCeZmEW-7Zjk1vxJXZyiBMFpoKYLPgi4sVsfivfksLn1MqVABvFP8\/s1600\/Song-Music-generator-circuit-using-ic-UM66.png\" imageanchor=\"1\" style=\"margin-left: auto; margin-right: auto;\" target=\"_blank\"\u003E\u003Cimg alt=\"um66 music generator circuit\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhkjoS4M_qwyfwQpHe9iLDqSDYPyuMOZuy0mrSRYCHtWZYunDWN5QSyOLDOFsbaHfqIHgKPpOdNy-it68P8F2B_kyGCeZmEW-7Zjk1vxJXZyiBMFpoKYLPgi4sVsfivfksLn1MqVABvFP8\/s1600\/Song-Music-generator-circuit-using-ic-UM66.png\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig: Circuit Diagram of Song-Music generator using IC-UM66\u003C\/i\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\n\u003Cbr \/\u003E\n\u003Cbr \/\u003E\nUM66TXX series IC generate different songs-music, the song-music depends on the model of UM66TXX series IC’s. The song-music are listed below with model number.\u003Cbr \/\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003Cbr \/\u003E\n\u003Cb\u003EUM66TXX Songs List:\u003C\/b\u003E\u003Cbr \/\u003E\nUM66T01 = Jingle Bells + Santa Claus is coming to town + Wish you a Merry X'mas\u003Cbr \/\u003E\nUM66T02 = Jingle Bells\u003Cbr \/\u003E\nUM66T04 = Jingle Bells + Rudolph, the red-nosed reindeer + Joy the world \u003Cbr \/\u003E\nUM66T05 = Home sweet home \u003Cbr \/\u003E\nUM66T06 = Let me call you sweetheart\u003Cbr \/\u003E\nUM66T08 = Happy birthday to you\u003Cbr \/\u003E\nUM66T09 = Wedding march\u003Cbr \/\u003E\nUM66T11 = Love me tender, Love me true\u003Cbr \/\u003E\nUM66T13 = Easter parade\u003Cbr \/\u003E\nUM66T19 = For Elise\u003Cbr \/\u003E\nUM66T32 = Waltz\u003Cbr \/\u003E\nUM66T33 = Mary had a little lamb\u003Cbr \/\u003E\nUM66T34 = The train is running fast\u003Cbr \/\u003E\nUM66T68 = It's small world\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/5465541019528622775\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/02\/music-generator-circuit-using-um66-ic.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/5465541019528622775"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/5465541019528622775"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/02\/music-generator-circuit-using-um66-ic.html","title":"Song-Music generator circuit using ic UM66"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhkjoS4M_qwyfwQpHe9iLDqSDYPyuMOZuy0mrSRYCHtWZYunDWN5QSyOLDOFsbaHfqIHgKPpOdNy-it68P8F2B_kyGCeZmEW-7Zjk1vxJXZyiBMFpoKYLPgi4sVsfivfksLn1MqVABvFP8\/s72-c\/Song-Music-generator-circuit-using-ic-UM66.png","height":"72","width":"72"},"thr$total":{"$t":"0"},"georss$featurename":{"$t":"Dhaka, Bangladesh"},"georss$point":{"$t":"23.709921 90.407143000000019"},"georss$box":{"$t":"23.596680000000003 90.312930500000022 23.823162 90.501355500000017"}},{"id":{"$t":"tag:blogger.com,1999:blog-4092621447904023766.post-8077951274467573594"},"published":{"$t":"2012-01-21T20:57:00.002+06:00"},"updated":{"$t":"2012-12-25T11:14:36.872+06:00"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"2N3904"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Astable Multivibrator"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Fun Circuit"},{"scheme":"http://www.blogger.com/atom/ns#","term":"LED and Light"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Led Flashing"},{"scheme":"http://www.blogger.com/atom/ns#","term":"Transistor Circuit"}],"title":{"type":"text","$t":"Astable multivibrator-2 LED flashing circuit,2N3904,3.7V"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\nMany of my friends asked me for automatic on off led circuit or\u0026nbsp; led flashing circuit so here I’m going to post a Astable multivibrator-2 LED flashing circuit.\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ch3 style=\"text-align: left;\"\u003E\n\u003Cb\u003ECircuit diagram of Astable multivibrator with 2 LED:\u003C\/b\u003E\u003C\/h3\u003E\n\u003Cbr \/\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgH8q_ZGdBCmGGaRTc-V82_YQLg0TAEtnW-NM_I9rNEP-JVzY-9sAN8bdQpRpkbXle4D8IeOUQY-9BUjraXvRLtzF10EDSB4CT5b-YSjAak9Oxn7Br4GpiQ3L2PVFiQ_xrkU2VV1Y6Z-XI\/s1600\/Astable+multivibrator-2+LED+flashing+circuit-2N3904.gif\" imageanchor=\"1\" style=\"margin-left: auto; margin-right: auto;\"\u003E\u003Cimg alt=\"Astable multivibrator circuit\" border=\"0\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgH8q_ZGdBCmGGaRTc-V82_YQLg0TAEtnW-NM_I9rNEP-JVzY-9sAN8bdQpRpkbXle4D8IeOUQY-9BUjraXvRLtzF10EDSB4CT5b-YSjAak9Oxn7Br4GpiQ3L2PVFiQ_xrkU2VV1Y6Z-XI\/s1600\/Astable+multivibrator-2+LED+flashing+circuit-2N3904.gif\" title=\"\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig:\u0026nbsp; Astable multivibrator-2 LED flashing circuit Circuit diagram\u003C\/i\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\nIt is a simple astable multivibrator circuit using 2LED (here i used red LED), two NPN small transistor 2N3904 for switching. Here other small NPN transistor can be used, including\u0026nbsp; 2N4401, 2N2222 or PN2222. Supply voltage is +3.7V to +5V or if you want to supply a larger volt then add a required resistor series connected with\u0026nbsp; 2 LED’s. I recommend to use +3.7V for best result . for +3.7V you can use a battery of\u0026nbsp; mobile phone.\u003Cbr \/\u003E\n\u003Cdiv style=\"text-align: justify;\"\u003E\n\u003Ca name='more'\u003E\u003C\/a\u003E\u003Cbr \/\u003E\nThe 5K ohms resistor and the 220uF capacitor determines the LED on time(flashing) for each side. You can experiment by changing the 5K \u0026amp; 220uF value.\u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Cb\u003E\u003Cbr \/\u003E\u003C\/b\u003E\n\u003Cb\u003EPin diagram of transistor 2N3904\u003C\/b\u003E:\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Ctable align=\"center\" cellpadding=\"0\" cellspacing=\"0\" class=\"tr-caption-container\" style=\"margin-left: auto; margin-right: auto; text-align: center;\"\u003E\u003Ctbody\u003E\n\u003Ctr\u003E\u003Ctd style=\"text-align: center;\"\u003E\u003Ca href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjtte_8fHEAi-LV8CqDIpO9BhlnKeC_HgM6j-Os_CimJY49fMXj3EquVDiyGRqji0Tj1E6A553WPfaSIaERtBv0_MGBPhSI05hBV3Trl4gp1KCNB5qdSyojjVPIyzhRkuCJdCcd0_B5xEU\/s1600\/Transistor-2N3904-Pin-diagram.png\" imageanchor=\"1\" style=\"margin-left: auto; margin-right: auto;\"\u003E\u003Cimg alt=\"2N3904 pinout\" border=\"0\" height=\"240\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEjtte_8fHEAi-LV8CqDIpO9BhlnKeC_HgM6j-Os_CimJY49fMXj3EquVDiyGRqji0Tj1E6A553WPfaSIaERtBv0_MGBPhSI05hBV3Trl4gp1KCNB5qdSyojjVPIyzhRkuCJdCcd0_B5xEU\/s320\/Transistor-2N3904-Pin-diagram.png\" title=\"\" width=\"320\" \/\u003E\u003C\/a\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003Ctr\u003E\u003Ctd class=\"tr-caption\" style=\"text-align: center;\"\u003E\u003Ci\u003EFig: 2N3904 Pin Diagram\u003C\/i\u003E\u003Cb\u003E\u003Cbr \/\u003E\u003C\/b\u003E\u003C\/td\u003E\u003C\/tr\u003E\n\u003C\/tbody\u003E\u003C\/table\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"https:\/\/www.circuitstune.com\/feeds\/8077951274467573594\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/01\/astable-multivibrator-2-led-flashing.html#comment-form","title":"6 Comments"},{"rel":"edit","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/8077951274467573594"},{"rel":"self","type":"application/atom+xml","href":"https:\/\/www.blogger.com\/feeds\/4092621447904023766\/posts\/default\/8077951274467573594"},{"rel":"alternate","type":"text/html","href":"https:\/\/www.circuitstune.com\/2012\/01\/astable-multivibrator-2-led-flashing.html","title":"Astable multivibrator-2 LED flashing circuit,2N3904,3.7V"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgH8q_ZGdBCmGGaRTc-V82_YQLg0TAEtnW-NM_I9rNEP-JVzY-9sAN8bdQpRpkbXle4D8IeOUQY-9BUjraXvRLtzF10EDSB4CT5b-YSjAak9Oxn7Br4GpiQ3L2PVFiQ_xrkU2VV1Y6Z-XI\/s72-c\/Astable+multivibrator-2+LED+flashing+circuit-2N3904.gif","height":"72","width":"72"},"thr$total":{"$t":"6"},"georss$featurename":{"$t":"Dhaka, Bangladesh"},"georss$point":{"$t":"23.709921 90.407143000000019"},"georss$box":{"$t":"23.596680000000003 90.312930500000022 23.823162 90.501355500000017"}}]}});