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Pressure Cooker Whistle Counter Circuit

This circuit is designed to sense the whistles from a pressure cooker and count the number over a digital display. The system relieves the user from the stress of constantly monitoring the cooker and from manually counting the whistles. The idea was requested by Mr. P.K. Bajpai Design Concept In many of the Asian countries … Read morePressure Cooker Whistle Counter Circuit

Convert Audio Amplifier into Pure Sinewave Inverter

If you are not too keen in understanding the deep technical aspects of a true sine wave power inverter, yet want to build it within a couple of hours, then this article will help you to accomplish it using an audio power amplifier and some DC motors. Here we’ll how to convert audio amplifiers into … Read moreConvert Audio Amplifier into Pure Sinewave Inverter

4 Tested Clap Switch Circuits

Want to build a simple clap switch circuit that will toggle any load in response to your claps? The article is presented exactly for this purpose. Here we discuss 4 unique and simple designs which can be selected as per user preference. Overview The article talks about what the title suggests – a clap switch. … Read more4 Tested Clap Switch Circuits

Passive Infrared (PIR) Motion Sensor Circuit

PIR with delay ON alarm

The post discuses the pinout details of the standard passive infrared (PIR) sensor RE200B and also explains how to make a motion detector circuit using a single transistor and relay, which can detect the IR radiation from human body and activate the attached relay. What is a PIR PIR is the acronym for Passive Infra … Read morePassive Infrared (PIR) Motion Sensor Circuit

5 KVA to 10 KVA Automatic Voltage Stabilizer – 220 Volts, 120 Volts

In this article we discuss an easy to build a 7 stage high wattage in the order of 5000 to 1000 watts stabilizer circuit which can be used  for controlling our mains AC line fluctuations and for producing very accurate stabilized voltage outputs for our domestic electrical appliances. Circuit Operation The proposed Accurate 7 relay OpAmp Controlled Mains … Read more5 KVA to 10 KVA Automatic Voltage Stabilizer – 220 Volts, 120 Volts

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