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3-Pin Solid-State Car Turn Indicator Flasher Circuit – Transistorized

Last Updated on January 17, 2023 by Swagatam 6 Comments

car solid state flasher unit

Although, most of the car electronics have evolved into solid-sate versions, a turn indicator flasher unit is one device which still depend on a relay based design in many of the modern cars. Disadvantages of Relay Based Flasher There are a couple major disadvantages of a relay based electromechanical flasher unit: 1) First, these being […]

Filed Under: Automobile Electronics Tagged With: Flasher, Indicator, Solid, State, Transistorized, Turn

4 Solid-State Car Alternator Regulator Circuits Explored

Last Updated on February 26, 2025 by Swagatam 85 Comments

car voltage regulator circuit

The 4 simple car voltage current regulator circuits I have explained below is created as a immediate alternative to any standard regulator and, although developed principally for a dynamo it will function equally effectively with an alternator. If the functioning of a traditional car alternator voltage regulator is analyzed, we find it amazing that these […]

Filed Under: Automobile Electronics Tagged With: Alternator, Circuits, Explored, Regulator, Solid, State

Solid State Relay (SSR) Circuit using MOSFETs

Last Updated on March 10, 2022 by Swagatam 198 Comments

SSR concept

SSR or Solid state relays are high power electrical switches that work without involving mechanical contacts, instead they use solid state semiconductors like MOSFETs for switching an electrical load. SSRs can be used for operating high power loads, through a small input trigger voltage with negligible current. These devices can be used for operating high […]

Filed Under: Electronics Theory Tagged With: MOSFETs, Relay, Solid, SSR, State

Solid State Contactor Circuit for Motor Pumps

Last Updated on January 2, 2024 by Swagatam 22 Comments

contactor using triac

In this article I have explained 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 […]

Filed Under: Motor Controller Tagged With: Contactor, Motor, Pumps, Solid, State

3 Solid-State Single IC 220V Adjustable Power Supply Circuits

Last Updated on November 17, 2023 by Swagatam 14 Comments

boardlayout

These AC to DC power supplies use a single chip to convert mains 220 V or 120 V input AC into 12 V or 5 V DC without depending on a transformer. Three simple yet efficient 220V single chip based solid state transformerless adjustable solid-state power supply circuits are discussed here. The first one works […]

Filed Under: Power Supply Circuits Tagged With: 220V, Adjustable, Power, Single, Solid, State

Solid-State Inverter/Mains AC Changeover Circuits Using Triacs

Last Updated on January 8, 2024 by Swagatam 24 Comments

inverter2Bmains2Bchangeover

In this post I have explained 2 simple concepts for making solid-state triac based Inverter/mains AC changeover circuit, the idea was requested by Music girl. Technical Specifications I would like to replace the SPDT relay with 2 scr’s. Would you consider a circuit to replace those changeover relays? I believe a relay would need to […]

Filed Under: Grid and 3-Phase Tagged With: AC, Changeover, Inverter, Mains, Solid, State

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