7805 Constant Current Battery Charger circuit
This is IC 7805 constant current circuit for battery charger, It is advantage that we have IC- 5-volts 1A positive voltage regulator as current regulation Read more
Doorbell circuit using transistors and IC-555
The 2 tone doorbell circuit, which is an electronic buzzer types,but them has melodic sound than general electric bell. People have seen two tone bell sound Read more
3 Electronic dice circuit with 7 segment display using CD4017
This is an electronic dice circuit. Which looks like a real dice. We use only the press switch being thrown. this is the high-tech toys. Such as, Game PC Read more
Simple VCO using schmitt trigger using 74HC14
This is Simple VCO circuit using schmitt trigger using 74HC14__Hex inverting, which inside have 6 schmitt trigger, but applied one frequency controller Read more
Simple metal detector circuit
This is a simple metal detector circuit, Can find various metal and adjustable sensitivity Easy to use near metal. use IC-NE556-Monostable multivibrator Read more