Bass and Treble Controller- Audio Equalizer Circuit

An audio equalizer circuit is used to adjust the frequency response of an audio signal. This is a simple equalizer circuit  for controlling the bass and treble (tone) of an audio amplifier. For use this equalizer circuit in amplifier, equalizer's output should be given in the input of amplifier. So that the main input  audio signal’s bass and treble could be controllable before the amplify section.

Circuit Diagram of Bass & Treble Controller- Audio Equalizer:

Fig: Audio equalizer circuit for Bass, Treble control

As shown here the bass and treble controller circuit  has two variable resistor(VR1 & VR2) to control  the bass and treble. VR1 for Bass Control and VR2 for Treble Control.

12v to 5v dc-dc converter circuit diagram

Power supply is needed for all of electronic circuits. Say you have a 12V power supply and you want to use it as a 5V power supply. Then use this 12v to 5v dc-dc converter circuit diagram to convert 12 volt to 5 volt. This DC converter circuit provide 5V, 1Amp at output. Here is the small schematic circuit diagram of 12volt to 5volt converter.

Circuit Diagram of 12VDC to 5VDC converter:

Fig: 12 volt to 5 volt dc converter circuit schematic

This DC-DC converter is based on IC LM7805. The LM 7805 is a 3-terminal fixed output positive voltage regulator IC. The output current of this circuit is up to 1Amp . Use a heat sink with LM7805 to protect the IC from overheating.