H-Bridge DC Motor Control circuit

This circuit enables us to apply voltage to a DC motor in either direction (Forward or Backward) ausing a control circuit.

Shadow detector alarm circuit with two LDRs

This circuit detects if there is a difference of lighting between two LDRs, and sends an audible and visual warning. Circuits that use two LDRs are more reliable than those that use only one.

Automatic Water Level Controller circuit

This circuit ensures that an elevated tank always has enough amount of water. Perfect for 2 or more stories buildings or houses

4A Variable Power Supply using LM317 and Transistor

This 4A variable power supply is useful when we want a variable power supply with a current greater than what a single lm317 regulator can deliver.

Automatic night light using 555 and relay

This Automatic night light using 555 IC turns lights on when there is no daylight. The circuit is perfect for lighting single places such as the garden, the front door of the house, the entrance to the garage, etc.

TDA2822M 2 watt audio amplifier circuit

This 2 watt audio amplifier circuit is specially designed to consume little power and to be used with batteries or low voltage power sources.

Electronic sound control circuit (applause)

This electronic sound control circuit works like a sound activated relay and can activate or deactivate a device connected to it, by two consecutive claps.

Twilight switch circuit with Op. Amp.and LDR

This Twilight switch circuit activates a light, a lamp, a motor, etc., at the time of sunset and performs the reverse process at dawn.

This is an ideal circuit for activating a security light that must be on all night.

400 watts Stereo Amplifier Circuit using STK4050

This 400 watts stereo amplifier circuit uses the Sanyo STK4050 hybrid IC, a high quality low noise amplifier. Its maximum output power is 200W per channel

Electronic Music Metronome circuit using a 555 timer

This Electronic Music Metronome circuit, allows those persons who study or are music fans, to keep the timing, quite accurately.

This 12v battery charger circuit using a LM350 and LM301A op-amp.

This 12v battery charger circuit allows you to charge a 12-volt car battery using a LM350 voltage regulator and a LM301A operational amplifier.

With this sound activated flash circuit, you can achieve incredible pictures of the most unexpected moments.

Pictures like a water balloon that just burst and the water still floats in the air, or when an object of any type explodes.