12V to 220V 500W Inverter Schematic

Inverter circuit is very useful equipment that can convert low voltage from the high voltage DC source to AC. The most common inverter circ...

Auto Remote Car Rear View Mirrors

Description : S1 = output from open/close central door lock S2 = output from open/close central door lock D1 = 1N4007 D2 = 1N4007 C1...

Led phototheraphy circuit

While doing a research across the web, I notice the topic about phototherapy. It says that exposure to a light at specific wavelength is be...

Infrared Remote Control Tester

This is a fairly easy circuit that can be used to test TV and VCR remote controls. The infrared detector module (GP1U52X) (Radio Shack 276...

Decibel Meter

The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a tra...

AC Line Current Detector

This circuit will detect AC line currents of about 250 mA or more without making any electrical connections to the line. Current is detect...

Touch Activated Light

The circuits below light a 20 watt lamp when the contacts are touched and the skin resistance is about 2 Megs or less. The circuit on the l...

Low Frequency Sinewave Generators

The two circuits below illustrate generating low frequency sinewaves by shifting the phase of the signal through an RC network so that osc...

Simple Power Amplifier Circuit [2N3055]

Simple Power Amplifier Circuit Diagram Transistors: Tr1 BCY70 (or BC 182L or BC212L or BC214L) Tr2/3/4 BFY50/51 Tr5 BFX88 Tr6/7 2N3055 Risk ...

Mono to Stereo Audio Signal Circuit Converter

This circuit is used to convert a mono audio signal into a stereo signal that can be panned between the left and right channel by a 0-10V co...