In this article we'll study a digital stopwatch design configured around the very popular IC LM555 in conjunction with a 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926).
Feb 18, 2015
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.
Feb 17, 2015
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.
Feb 11, 2015
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.
Feb 8, 2015
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.
Feb 6, 2015
A simple, cheap yet highly effective infrared remote control security lock circuit can be studied in the following post.
In this post we'll study a simple opamp circuit design which can be applied for measuring the beta or the forward current gain of a particular BJT in question.
The discussed phone repeater circuit can extend the range of your land line ring sound from the phone such that one is able to make a call heard in another room or even in another house.
Feb 2, 2015
This power interruption alarm circuit will alert you whenever there's a power failure or an interruption in the mains. In some special conditions it becomes imperative to know whether the mains that powers some important system or circuit is absent.
Feb 1, 2015
The circuit identifies and detects the temperature difference between two sensors and activates a relay when the temperature is not identical on these differently positioned sensors.