This is an old or "very old" schematic diagram of birdie tone or sound generator. Then, the bird sound circuit…
This is the circuit diagram of two tones train horn which built based dual timer IC NE556. The circuit is…
Here is the simple and low cost mosquito repellent circuit design. The circuit serves to keep the mosquitoes out of…
This is the electronic bicycle directional lights circuit that use inexpensive components and is a good substitute to many commercially…
This is the circuit diagram of digital clock based on IC MM5314N. The clock display uses 6 pieces of 7…
This is the electronic circuit diagram of metronome sound generator. The circuit featured adjustable volume and beats/minute with potentiometers. LED…
This is the circuit diagram of electronic quiz button table. This circuit is simple, easy to built and of course…
This is the circuit diagram of game scoring display using 7 segment LED. This circuit consist of a timer IC,…
This is the circuit diagram of Clap On / Off Switch. The circuit allows you to operate your lighting or…
This is the traffic baton circuit which available in two versions that are traffic baton with LED flasher and traffic…