The following circuit is a 5W stereo audio amplifier, built based on single amplifier IC TA7227. The TA7227 can be used for dual mode (stereo amp) and single mode (bridge…
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Tube Distortion Pedal
The following circuit is tube distortion pedal for guitar effect. The circuit designed by Ron Black. Circuit Notes: IC1 : 747 dual op-amp, other ICs may be substitued but pinout…
Simple Mixer 4 Input
Here the simple mixer circuit with 4 inputs and 2 operational amplifier (op-amp) modules: A basic mixer suitable for mixing microphones or even effects outputs. The overall gain from input…
LEDs Temperature Indicator
…increase by 10mV per degree rise in temperature. Output of LM35 is joined to the non inverting input of the operational amplifier (op-amp) of CA3130. The inverting input of the…
Current Output Multiplier for 78xx Regulator
…C2 = 4700 uF / 16V C3 = 47,000 uF / 35V D1,D2, D3 = 1N5401 ( 3 Amp Diodes ) D4 & D5 – Light Emitting Diodes (LED)** IC1,…
Electro Harmonix Fuzz-Wah Guitar Effect
This is the electro harmonix fuzz-wah guitar effect pedal circuit diagram. Circuit Notes: Q1 & Q2 are 2n3565 Fuzz bypass S1 has been improved to provide true bypass S3 chooses…
Two Tone Train Horn based NE556 Dual Timer
…The circuit diagram is in a “basic” design, you may try to modify this circuit, for example: use a low power audio amplifier and use a small horn speaker 😀…
Stereo Tone Control with Line In + Microphone Mixer
This is an active stereo tone control circuit using very well known op-amp IC of TL072. The circuit include mic pre-amp and mixer control. In this design, we have two…
800W Audio Amplifier with MOSFET
Here the schematic diagram of 800 watt audio power amplifier with MOSFET for final amplification. This amplifier can be used for practically any application that requires high power, low noise,…
Basic UPS Circuit 5V and 12V DC
…the UK (it might be various for other countries, 110/120V or 220/240V). The secondary winding should be rated at least 12 Volts at 2 Amperes, but can be higher, for…