This single MOSFET solid-state relay SSR circuit is a very simple where you can drive an AC load like a lamp, motor, or any oter AC load, through a small DC control voltage. We use only one IRF840 MOSFET to switch the 220V AC load, and we do this with some clever diode bridge arrangement, […]
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Solid State Relay (SSR) Circuit using Two MOSFETs
SSR or Solid state relays are high power electrical switches that work without involving mechanical contacts, instead they use just a couple of solid state semiconductors like MOSFETs for switching an electrical load, smoothly, and with high efficiency. SSRs can be used for operating high power loads, through a small input trigger voltage with negligible […]
Solid State Contactor Circuit for Motor Pumps
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 […]
Understanding IC 4043B, IC 4044B CMOS Quad 3-State R/S Latch – Working and Pinouts
In this post I have explained the pinout function and other important specifications of the IC 4043. I have explained about the complete datasheet of this very interesting chip. Pinout Datasheet of IC 4043 Technically the IC 4043 is a quad set/reset (R/S) latch with 3 logic state output. To be more precise this chip […]
4 Solid-State Car Alternator Regulator Circuits Explored
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 […]
220V Solid State Relay (SSR) Circuit using Triac and OptoCoupler
An AC mains solid state relay or SSR is a device which is used for switching heavy AC loads at mains level, through isolated minimal DC voltage triggers, without incorporating mechanical moving contacts. In this post I have explained how to construct a simple mains operated solid state relay or an SSR circuit using a […]