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Showing posts from August, 2012

Class-A Headphone Amplifier Circuit

400mW RMS into 32 Ohm load, Single-rail Supply - Optional Tilt Control This design is derived f… Read this circuit » Class-A Headphone Amplifier Circuit

Push Button Relay Selector Circuit

This circuit was designed for use in a hifi showroom, where a choice of speakers could be connect… Read this circuit » Push Button Relay Selector Circuit

Timer Garage Door Circuit

Because I’m old school, I wanted to build a Garage Door Closing circuit without relying on integr… Read this circuit » Timer Garage Door Circuit

Electronic Fuse for DC Short Circuit Protection

This is an electronic fuse that protects the load against short circuit. Relays must be chosen wi… Read this circuit » Electronic Fuse for DC Short Circuit Protection

3 in 1 FlashLight Circuit

Want to avoid the problem of carrying three different flashlights to perform a test? Why don’t you… Read this circuit » 3 in 1 FlashLight Circuit

LM317 Calculator

This calculator helps you set the output voltage of LM317 regulator IC by simply replacing the val… Read this circuit » LM317 Calculator

Laptop Power Supply for Car

Laptops today are the what is called notebook computers, which now is becoming popular. Laptops ca… Read this circuit » Laptop Power Supply for Car