7 Watt Audio Amplifier with IC TDA2003
This is an amplifier circuit with gain music output power up to 7W. It uses IC TDA2003 as main component.…
2 x 3W Stereo Audio Amplifier with IC BA5406
This is 2 x 3W stereo audio amplifier based on IC power BA5406. This circuit which will give you 3W…
2x1W Stereo Amplifier with IC KA2209
This is 2x1W stereo amplifier circuit based on single IC KA2209. IC KA2209 is an equivalent IC to the TDA2822,…
1W Stereo Audio Amplifier using LM386N
This is 1W stereo audio amplifier with LM386N. The output power is 1 watt for each channel, so it should…
1W Audio Amplifier with TDA7052
This is the circuit diagram of 1W audio amplifier which use TDA7052 as the main component and other 5 pieces…
Flame, gas and smoke detector
Flame, gas and smoke detector for fire alarm. You can combine this circuit with alarm circuit. The output will be…
Simple Fire Alarm with Thermistor and NE555
The following circuit is a simple fire alarm circuit based NE555 timer and use thermistor as a temperature detector. This…
DIY Simple Multitone Alarm
Here is the circuit diagram of simple multitone alarm. This is a low cost circuit which is simple and easy…
2x90W Stereo Tube Power Amplifier with EL34
This document is the manual of 2x90W Stereo Tube Power Amplifier with EL34, model K4040 by Velleman. The document in…