Power Supply Failure Alarm
This is the 'special' circuit design of power supply failure alarm. The vast majority of the power supply failure alarm…
USB Powered, Stereo Computer Speaker
This is the circuit diagram of USB powered stereo computer speaker, or it widely known as multimedia speakers for PCs.…
Shutter Guard
This is the shutter guard circuit which has sensitive vibration sensor, piezo-sensor. This circuit is specifically designed for outlets to…
Automatic Switch-Off Staircase Light
This is the circuit diagram of staircase light with automatic switch off. It based on timer which is can be…
Portable 230V Lamp Flasher
This is a portable, 230V high-power incandescent electric lamp flasher circuit diagram. It is actually basically a double flasher (alternating…
Electronic Horn
This is an easy, low cost and easy built circuit of an electronic horn which is designed close to quadruple…
Cheap Motorcycle Alarm
This is simple to build and cheap motorcycle alarm circuit which could be fitted in motorcycles to take care of…
Ticking Bomb Sound Generator
Here the low cost and easy build circuit of ticking bomb sound generator. This circuit generates a sound matching to…
White Line Follower
This is the circuit diagram of white line follower toy. The actuator of the toy is the DC motor. This…
Cheap Hearing Aid
Here the cheap hearing aid to help people who have hearing loss. Commercially available assistive hearing devices are quite expensive.…