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Relay

RC Snubber Calculator for MOSFETs, Relay Contacts and Triacs

Last Updated on September 15, 2025 by Swagatam 8 Comments

This calculator is basically finding out two things: …so that we can make a perfect RC snubber for killing high voltage spikes across: Now let us break down everything it’s calculating. RC Snubber Calculator Application Type: MOSFETTRIACRelay Contact Peak Voltage (V): Peak Current (A): Rise Time (µs): Calculate Snubber © homemade-Circuits.com Basic Snubber Formula Logic […]

Filed Under: Voltage Control and Protection Tagged With: Calculator, Contacts, MOSFETs, RC, Relay, Snubber

Clap Switch Circuits with Relay ON/OFF: [Tested]

Last Updated on June 27, 2025 by Swagatam 226 Comments

clap switch

The clap switch circuits explained here will toggle a connected load ON and OFF in response to alternate clap sounds? Here I have explained 4 unique and simple designs which can be selected as per user preference. The article talks about what the title suggests – a clap switch. A small electronic circuit when built […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Clap, OFF, ON, Relay, Switch

Prevent Relay Arcing using RC Snubber Circuits

Last Updated on January 2, 2024 by Swagatam 148 Comments

arc suppression compressed

In this article I have explained the formula and techniques of configuring RC circuit networks for controlling the arcing across relay contacts while switching heavy inductive loads. Arc suppression An arc is produced across the contacts when a switch or a relay is opened. With time, this condition can wear down the contacts. To overcome […]

Filed Under: Voltage Control and Protection Tagged With: Arcing, Circuits, Prevent, RC, Relay, Snubber

Temperature Controlled Relay Switch Circuit

Last Updated on January 2, 2024 by Swagatam 223 Comments

temperature controlled relay circuit

In this article I have explained a simple temperature controlled relay circuit which can be switched ON/OFF depending on the temperature on its temperature sensor. Meaning, when the temperature on its temperature sensor rises above a set threshold point, the relay switches ON, and when the temperature drops below the threshold, the relay switches OFF. […]

Filed Under: Temperature Controllers Tagged With: Controlled, Relay, Switch, Temperature

Thermostat Delay Relay Timer Circuit

Last Updated on January 2, 2024 by Swagatam 14 Comments

thermostattimercircuit

The circuit given below describes a time delay relay system which is used for keeping a hot air blower working under a specifically programmed timing sequence. The idea was requested by Mr. Doug Shadix, I have explained more: Technical Specifications Hi Swagatam,Looks like you know your stuff when it comes to these timer circuits, this one […]

Filed Under: Timer and Delay Relay Tagged With: Delay, Relay, Thermostat, Timer

Transformerless Relay Driver Stage

Last Updated on January 2, 2024 by Swagatam 8 Comments

MainPowerSupplyCircuitBRINKSModelNo 7011W28SecurityLightingSystemMotionActivated200wattHalogenBulb29

In this post I have explained an enhanced transformerles power supply circuit design which consists a well stabilized and regulated DC stage along with a relay driver stage which operates through an external pulse. he idea was suggested by Mr. Reza. Technical Specifications Reza: Dear Sir, I have a problem with one Circuit regarding converting […]

Filed Under: Power Supply Circuits Tagged With: Driver, Relay, Stage, Transformerless

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