DC Coupled Audio Amplifier

Designs for audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages. One advantage is that there is no need for... Read More

Audio Stereo Power Amp Circuit

This is a 50 Watt Audio power amplifier circuit based single IC STK4036II. Use heatsink to prevent overheating on the IC. The amplifier circuit will give you good quality of sound unexpensive... Read More

Phone ringtone generator circuit

This is a simple home telephone ringtone generator circuit which is built with applying only several electronic components / parts.It generates simulated telephone ringtone and requires only DC supply with 4.5V... Read More

Battery Indicator schematic diagram

This circuit diagramc shows a simple battery level indicator.In general, in mobile phones, the battery levels is displayed in dot or bar style.This helps you to effortlessly acknowledge the battery level.... Read More

6 Input Mixer

 A simple mixer with 3 line inputs and 3 mic inputs using commonly available parts. ... Read More

Rain Detector schematic

Here's a simple rain detector circuit. It uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer.... Read More

Lead Acid Battery Charger

Except for use as a normal Batter Charger, this circuit is perfect to 'constant-charge' a 12-Volt Lead-Acid Battery, like the one in your flight box, and keep it in optimum charged... Read More