250mW RF Power Amplifier
This is an 250mW RF power amplifier circuit project. This circuit is designed to amplify the output of about 7mW…
220V Light Dimmer
This simple 220V light dimmer circuit can be used to adjust the brightness of mains lights. It also can be…
Sound Activated Switch
This is a sound activated switch circuit. It's will turn on and turn off based on a loud sound such…
20W Bridge Amplifier using TDA7240A
This is a simple 20W bridge amplifier based on TDA7240A. This circuit is designed for car audio system, but you…
2 x 70W Power Stereo Amplifier based on IC STA550
Here's the circuit diagram of a 70W stereo power amplifier which built using single power IC STA550. The circuit is…
220V LED Flasher
This is a 220V LED flasher circuit which is intended as a reliable replacement to thermally-activated switches used for Christmas…
80W Audio Amplifier Using TDA7295
Below is a 80W audio amplifier circuit is constructed by using a power IC TDA7295. With a very simple design,…
Nokia Cell Phone
This is the Nokia cellphone wiring diagram collection. Fixing a cell phone is basically not a difficult thing. All you…
TDA7381 4 x 25W Quad Audio Amplifier
The following is 4 x 25W quad audio amplifier circuit (amplifier with four inputs and four outputs) based TDA7381. This…