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Newly Updated Circuit Projects:

Programmable Solar Porch Light Circuit

Last Updated on December 21, 2023 by Swagatam 25 Comments

solargardenlightwithtimercircuit

In this post I have explained a porch light circuit with programmable timer controller which enables the connected LEDs to light up or shut off after some delay, as preferred by the user, thus it’s not entirely dependent on the solar panel parameters. The idea was requested by “Unknown”. Technical Specifications It’d be neat if […]

Filed Under: Solar Controller Circuits, Timer and Delay Relay Tagged With: Light, Porch, Programmable, Solar

32V, 3 Amp LED Driver SMPS Circuit

Last Updated on June 1, 2026 by Swagatam 228 Comments

32v3ampsmpscircuit

In this article I have explained a 32V, 3 amp SMPS circuit which may be specifically used as an SMPS 100 watt LED driver, rated with the same specs. The circuit of the proposed 32 V, 3 amp smps led driver may be understood with the the help of the following points: Circuit Operation The […]

Filed Under: Lamps and Lights Tagged With: 32V, Driver, LED, SMPS

Arduino Mains Failure Battery Backup Circuit

Last Updated on May 14, 2026 by Swagatam 6 Comments

arduinoback up

In this article I have explained a simple mains failure backup circuit for providing Arduino boards an uninterruptible supply during such situations. The idea was requested by Mr. Fredrik. Technical Specifications This blog gave me a lot of interesting information. Especially the power supply circuit with battery backup part. The reason for this is that […]

Filed Under: Arduino Projects Tagged With: Arduino, Backup, Battery, Failure, Mains

Customizing Car Side Marker Lights to Flashing Side Markers

Last Updated on May 16, 2026 by Swagatam 32 Comments

240SXDiagram

In this article I have explained a car side marker modification which enables it to respond to the existing turn signal pulses and flash in tandem with the turn signal flashing. The idea was requested by Mr. Jerry Klein. Technical Specifications I have a 1990 automobile which I believe does not have very sophisticated circuitry […]

Filed Under: Automobile Electronics Tagged With: Customizing, Flashing, Lights, Marker, Markers, Side

Automatic PWM Door Open/Close Controller Circuit

Last Updated on January 2, 2024 by Swagatam 5 Comments

pwmmotorcontrol

In this post I have explained a simple PWM controlled automatic turnstile or door circuit featuring an automatic open/close action via a photo-interrupter stage. The idea was requested by Mr. Bruce Clark. Technical Specifications Thank you for a really fantastic service you provide. Would you please be so kind as to help me with a […]

Filed Under: Sensors and Detectors Tagged With: Automatic, Close, Controller, Door, Open, PWM

What’s Islanding in GTI (Grid Tie Inverter)

Last Updated on August 3, 2020 by Swagatam 4 Comments

One big issue that most GTI manufacturers struggle to implement effectively is, what is commonly known as “islanding”, the following discussion throws light on this important factor and tries to find a solution. The issue was pointed out and clarified by Mr. Dennis, I have explained more. What’s GTI Islanding G’day, With any luck at […]

Filed Under: Inverter Circuits Tagged With: Grid, GTI, Inverter, Islanding

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