Stereo decoder circuit. In FM stereo transmission left and right channels are algebraically encoded into sum (left + right) and difference (left-right) signals. This is done in order…
12V/120mA switch mode power supply circuit Transformer less switch mode power supplies have become very popular these days. The circuit shown below is of a 12V/120mA output, 85…
LDO regulator / low dropout regulator LDO regulator means low dropout regulator. An LDO voltage regulator is just a DC linear voltage regulator which can be operated with…
Switching regulator . Switching regulators work by drawing small amounts of energy from the input source and transferring it step by step to the output. This task is…
Sample and hold circuit using op-amp As the name indicates , a sample and hold circuit is a circuit which samples an input signal and holds onto its…
Three phase bridge rectifier using 20L6P45. Three phase full wave rectifier circuit is an advanced power rectifier circuit mostly used for industrial DC applications. This module basically has…
Some circuits based on LM317 voltage regulator Few useful circuits using the voltage regulator IC LM317 is shown here. LM317 is a three terminal voltage regulator IC from…
Water level controller circuit Note:- We have developed another water level controller circuit using micro controller AT89S51 from Atmel. If you are interested, read that too :- Water…
LM1830 based liquid level indicator circuit. LM1830 is a monolithic integrated circuit that can be used in liquid level indicator / control systems. Manufactured by National Semiconductors, the…
Frequency to Voltage converter circuit based on TC9400 IC. Description. A very simple and low cost frequency to voltage converter based on the TC9400 IC from Microchip is…
Tone control circuit. This is just another circuit designed by Mr. Seetharaman Subramanian and time it is a high quality passive tone control circuit that has an overall…
Power saving LED lamp from your scrap box. This circuit is designed by Mr Seetharaman Subramanian and we are very glad to publish it here. In this article…
This article is a list of various types of amplifier circuits built using Transistors alone.This includes a Class AB amplifier using 4 transistors, then we have a headphone…
12V to 24V converter. Description. There are many instances where we require 24V DC from a 12V source. I also once faced a situation like this when I…
Intercom circuit with ringer Description. A simple intercom circuit designed based on transistors is shown here. This intercom circuit does not require a changeover switch and you can…
MK484 AM receiver circuit Description. A simple AM receiver circuit based on the MK484 AM receiver IC from Rapid Electronics Ltd is shown here. MK4844 is a monolithic…
Automatic night light circuit Description. A cheap and simple automatic night light using few transistors and NE555 timer is shown here. The circuit will automatically switch on the…
6 to 15V DC to DC converter using LM2585 Description. A very efficient 6V to 15V DC to DC converter using LM2585 is shown here. LM2585 is a monolithic…
Stereo FM transmitter circuit using BA1404. Notes. A high quality stereo FM transmitter circuit is shown here. The circuit is based on the IC BA1404 from ROHM Semiconductors.…
Description. A simple 12V to 120V DC DC converter circuit is shown here. The circuit consists of two stages firstly a basic inverter stage and then a rectifier…
5V Boost Converter circuit . Description. A simple 5V boost converter using LTC3440 is shown here. LTC3440 is a highly efficient DC to DC converter that can be…
Buck Boost converter circuit using LTC3440 Description. A very efficient buck boost converter circuit is shown here. The circuit is based on the LTC3440 buck boost regulator IC…
DC motor control circuit using NE555 Are you familiar with all the applications of 555 timer circuits? If not, we can help you. We all know that for…
TDA2613 Hi Fi audio amplifier Description. A 6 watt audio amplifier circuit using TDA2613 is shown here. TDA2613 is an integrated Hi-Fi audio amplifier IC from Philips Semiconductors.…
Car Audio Amplifier Circuit: Given below is a car stereo amplifier circuit using audio amplifier IC – TDA2040 Description of the circuit: A car stereo amplifier circuit using…