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Solid State Contactor Circuit for Motor Pumps

electronic solid state contactor circuit

In this article we learn how to design and build a solid state contactor circuit using triacs for operating heavy duty loads like submersible borewell pump motors with high reliability, and without any concerns about wear and tear issue or long term degradation issues of the contactor unit. What is a Contactor A contactor is … Read moreSolid State Contactor Circuit for Motor Pumps

Surge Arrestor Circuit with Measuring Facility

In this post we learn about a simple surge voltage protector circuit using a fuse and a triac crowbar circuit and also learn the method to record and measure the last maximum surge that could have destroyed the specified load in case the protection was not introduced. The idea was requested by Mr. Akram. Circuit … Read moreSurge Arrestor Circuit with Measuring Facility

Triac Phase Control using PWM Time Proportional

A triac phase control using a PWM circuit can be useful only if it’s implemented using a time-proportional format, otherwise the response could be haphazard and inefficient. In a few of of my earlier articles as given below: Simple Remote Controlled Fan Regulator Circuit Push Button Fan Regulator with Display Circuit Dimmer Circuit for LED … Read moreTriac Phase Control using PWM Time Proportional

Triac based SPDT Relay Switch Circuit

The post details a simple solid state triac SPDT relay circuit, using an optocoupler and a couple of triacs, which can be used as an effective replacement for mechanical relays. The idea was requested by “Cypherbuster”. Introduction In one of the other posts we learned how to make an DPDT SSR using mosfets, however this … Read moreTriac based SPDT Relay Switch Circuit

3 Phase Induction Motor Speed Controller Circuit

In this post we discuss the making of a simple 3 phase induction motor speed controller circuit, which can be also applied for a single phase induction motor or literally for any type of AC motor. When it comes to controlling the speed of induction motors, normally matrix converters are employed, involving many complex stages … Read more3 Phase Induction Motor Speed Controller Circuit

220V Dual Alternate Lamp Flasher Circuit using Transistor and Triac

This is a mains operated transformerless flasher circuit that can be used for alternately switching a couple of CFL or similar 220V/120V lamp to produce a decorative lighting effect. Circuit Operation The below shown design depicts a simple mains operated dual or alternate lamp flasher, which is designed to flash or blink two mains operated … Read more220V Dual Alternate Lamp Flasher Circuit using Transistor and Triac

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