Tuesday, March 3, 2015

Sinewave Inverter Circuit Using Arduino

The post explains how to build a simple sinewave inverter circuit using PWM feed from an Arduino Uno board, the article also discusses a sinewave 3 phase inverter using the same input from an Arduino. The idea was requested by Mr. Raju Visshwanath

Thursday, February 26, 2015

Digital Stop Watch Circuit

In this article we'll study a digital stop watch design configured around the very popular IC LM555 in conjunction with a 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926).

Wednesday, February 25, 2015

Simple Digital Clock Circuit Explained

The digital time clock explained here is a circuit which most electronic amateurs would love to make.

Tuesday, February 24, 2015

Make this LED Cricket Stump Circuit at home

In this post we learn how to make an LED cricket stump for helping umpires declare a foolproof OUT, NOT-OUT decisions.

Wednesday, February 18, 2015

SG 3525 Automatic PWM Voltage Regulation Circuit

The post explains a simple configuration which can be added with all SG 3525/3524 inverter circuits for implementing automatic PWM output voltage regulation by the IC. The solution was requested by Mr. Felix Anthony.

Car Interior Light Fader Circuit

The post explains a simple circuit which can be used for producing a slow fading light effect each time it's switched OFF. The application can be typically used in car interior lights.

Tuesday, February 17, 2015

6V to 220V Boost UPS Circuit for Satellite TV Modems

The post explains a simple boost converter UPS circuit for supplying an uninterruptible power to satellite TV set top boxes so that the offline recording is never allowed to fail during power outages. The idea was requested by Mr. Aniruddha Mukherji. 

Friday, February 13, 2015

Cellphone Jammer Circuit Explored

This is a RF jammer designed for the U.S. 800 MHz cellular phone band (870-895 MHz). This works by generating an overwhelming sweeping RF carrier on the cell phone handset's operating frequency range.

Wednesday, February 11, 2015

Voltage Stabilized Transformerless Power Supply Circuit

The post explains how an ordinary capacitive power supply may be transformed into a surge free voltage stabilized or variable voltage transformerless power supply applicable for almost all standard electronic loads and circuits. The idea was requested by Mr. Chandan Maity.

Sunday, February 8, 2015

Light Activated Water Level Controller Circuit

The light activated water level controller circuit explained here has the advantage of being corrosion free and much reliable than the traditional moisture sensor type of water sensors.
Readers are advised to proceed with the construction of the presented circuits only after understanding the concepts from the core. Not adhering to this can lead to failures and frustrations.
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