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SPDT Relay Switch Circuit using Triac

Last Updated on September 13, 2019 by Swagatam 14 Comments

An efficient solid state single pole double throw or SPDT switch can be built using triacs for replacing a mechanical SPDT. The post details a simple solid state triac SPDT […]

Filed Under: Inverter Circuits

SPDT Solid State DC Relay Circuit using MOSFET

Last Updated on December 21, 2021 by Swagatam 110 Comments

In this post we’ll study a simple high current mosfet based SPDT DC relay, which can be used in place conventional bulky SPDT mechanical relays. The idea was requested by […]



Filed Under: Inverter Circuits

How a Relay Works – How to Connect N/O, N/C Pins

Last Updated on June 5, 2022 by Swagatam 33 Comments

An electrical relay consists of a electromagnet and a spring loaded changeover contacts. When the electromagnet is switched ON/OFF with a DC supply, the spring loaded mechanism is corresponding pulled […]

Filed Under: Electronic Components, Electronics Tutorial

5 Best 6V 4Ah Automatic Battery Charger Circuits Using Relay and MOSFET

Last Updated on August 17, 2020 by Swagatam 311 Comments

The following 5 versions of 6 volt 4 AH battery charger circuits has been designed by me and posted here in response to the request from Mr. Raja, let’s learn […]

Filed Under: Battery Chargers, LM317/LM338

Tennis Ball Throwing Machine Circuit

Last Updated on May 23, 2021 by Swagatam Leave a Comment

In article below explains the control circuit for an automatic tennis ball throwing machine, designed to throw a tennis ball through a mechanized catapult machine, controlled with powerful motors. In […]

Filed Under: 555 IC Circuits, Fun Projects



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