Simple Water Level Indicator

jacky November 6, 2018 271 Comments

Water Level Indicator Description This is the circuit diagram of a simple corrosion free water level indicator for home and industries. In fact, the level of any conductive non-corrosive liquids can be measured using this circuit. The circuit is...
read more

Simple Lamp Dimmer/ Fan Regulator Circuit

admin November 3, 2018 34 Comments

Lamp Dimmer/Fan Regulator Circuit We have modified this circuit: - Take a look - Modified Lamp Dimmer Description The light dimmer circuit or fan regulator circuit (either case, the circuit and design are the same, only difference is the...
read more

Fridge Door Open Alarm

jacky November 3, 2018 11 Comments

Fridge Door Open Alarm Circuit Description A fridge door open alarm circuit is explained with its detailed working and circuit. The objective of this circuit is to produce an audible alarm when fridge is left open for more than...
read more

Security Alarm Circuit With High Power Siren

admin October 23, 2018 5 Comments

High Power Siren Security Alarm Circuit Description In this article, we have designed a transistor based security alarm circuit with a high power siren that can be used to provide security for homes or as a warning for intruders...
read more

Automatic LED Emergency Light Circuit

admin October 23, 2018 327 Comments

LED Emergency Light An Automatic LED Emergency Light circuit is designed to turn ON when there is no adequate lighting or if the power supply is cut-off. Earlier fluorescent lights were used to build such circuits. But the use...
read more

Volume Control Circuit

jacky October 16, 2018 3 Comments

Digital Volume Control Circuit All audio amplifiers have some mechanism to increase and decrease volume. Most such mechanisms involve mechanical parts like a potentiometer. Here this project is to create an audio controller which works digitally. This is a...
read more

Electronic Combination Lock using IC LS 7220

jacky October 15, 2018 43 Comments

Electronic Combination Lock Circuit Description A simple electronic combination lock is designed using IC LS 7220. This circuit can be used to activate a relay for controlling (ON & OFF) any device when a preset combination of 4 digits...
read more

Tone Generator – Ding-Dong Bell using IC 8021 and Transistors

jacky October 15, 2018 6 Comments

A simple “tone generator” is a cool circuit that everyone must build in their electronics learning process. We’ve designed this tone generator circuit using 8021 IC, two transistors (BC548 or C8050), a small speaker and some associated components. As...
read more

Simple Proximity Detector

jacky October 17, 2018 11 Comments

In this project, let’s learn how to make a Simple Proximity Detector or Sensor circuit using minimal components. A proximity detector is a fun project with lots of interesting applications to be built with. You can make very useful...
read more