230V Led Flasher Circuit using DIAC

This is a very simple LED flasher circuit diagram that is powered from AC 230V mains. This Flasher can be used as a power indicator for the AC 230V mains supply. This circuit is made with few numbers of parts namely, a LED, two Resistors, one Capacitor, one Diode and one DIAC.  The DIAC act the main role to flashing the LED. DIAC is a bidirectional device. It conducts current only after its breakover voltage has been reached its threshold. Most DIAC's break-over voltage is around 30 V.

230V Mains Power Indicator LED Flasher Circuit Diagram

Fig: Circuit Diagram of 230V Led Flasher

Astable multivibrator-2 LED flashing circuit,2N3904,3.7V

Many of my friends asked me for automatic on off led circuit or  led flashing circuit so here I’m going to post a Astable multivibrator-2 LED flashing circuit.

Circuit diagram of Astable multivibrator with 2 LED:

Fig:  Astable multivibrator-2 LED flashing circuit Circuit diagram

It 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  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  2 LED’s. I recommend to use +3.7V for best result . for +3.7V you can use a battery of  mobile phone.