Pulse Charger for Reviving Tired Lead Acid Batteries

DIY Tremolo Effect

This tremolo effect circuit uses the XR2206 and the TCA730 IC which is designed as an electronic balance and volume regulator with frequency... Baca selengkapnya »

Fox Hunt Transmitter

This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is to be “hunted” using mostly home bre... Baca selengkapnya »

Polyphonic DoorBell

Here is an AC triggered Multitone, polyphonic doorbell. It gives eight melodious tunes for 2 minutes. On each press it will give a new tone... Baca selengkapnya »

Photodiode Alarm

This Photodiode based Alarm can be used to give a warning alarm when someone passes through a protected area. The circuit is kept standby th... Baca selengkapnya »

5V Power Supply Using LTM8021

This 5v power supply circuit is designed using the LTM8021 and will provide a maximum current up to 500mA. Almost all required parts are i... Baca selengkapnya »

Solar Power Supply

This circuit delivers either 4.8 or 7.2 V regulated at 15 mA with a 3-V input from a bank of photocells. Rl should be 453 kQ for a 7.2-V ou... Baca selengkapnya »

30V Variable Power Supply Using LM317

This 30v variable power supply circuit is based on LM317  voltage regulator circuit . This LM317 30v variable power supply circuit can del... Baca selengkapnya »

Variable Power Supply Using LM723

Using LM723 regulator can be designed a very simple variable power supply circuit which can provide a maximum current up to 2A and a varia... Baca selengkapnya »

Dual Regulated Power Supply

In this circuit, the 7815 regulatates the positive supply, and the 7915 regulates the negative supply. The transformer should have a primary... Baca selengkapnya »

Portable CD Player Adapter For Car

Whenever I'm in the car listening to my favourite CD, it always happens; my batteries go dead. To solve that problem, I built this extre... Baca selengkapnya »

Batteries Charger & PSU - Ideal for Digital Cameras

This circuit was created for digital cameras. It's known the digital cameras have considerable power consumption. For example my camera ... Baca selengkapnya »

Telephone Tapping Indicator

This simple circuit can indicate a misuse or tapping of Telephone line through a loud alarm. The circuit is too simple and can be easily ass... Baca selengkapnya »

Automatic Load Sensing Power Switch

This circuit will automatically switch on several mains-powered "slave" loads when a "master" load is turned on. For exa... Baca selengkapnya »

7 Watt Audio Amplifier Using TDA2003

Amplifier Circuits Diagram Schematic diagram of a simple 7 watt audio amplifier using TDA2003 Amplifier IC. This is a good IC with man... Baca selengkapnya »