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Automatic

Simple Solar Garden Light Circuit – With Automatic Cut Off

Last Updated on June 1, 2026 by Swagatam 338 Comments

A very simple automatic solar light system for illuminating your garden passages can be built using some LEDs, a rechargeable battery and a small solar panel. The system automatically switches ON the lamps at dusk and switches them OFF at dawn. Main features Although the following simple automatic solar LED garden light circuit looks simple, […]

Filed Under: Lamps and Lights, Solar Controller Circuits Tagged With: Automatic, Garden, Light, Simple, Solar

3 Automatic Fish Aquarium Light Optimizer Circuits

Last Updated on June 1, 2026 by Swagatam 3 Comments

solarfishaquariumlightoptimizercircuit

In this post I have explained a 3 beautiful fish aquarium light optimizer circuits your fishes will love. These are designed to automatically control the illumination of a group of appropriately selected LEDs with respect to the varying daylight and after darkness sets in. The first idea was requested by Mr. Amit 1) Sun light […]

Filed Under: Lamps and Lights Tagged With: Aquarium, Automatic, Circuits, Fish, Light, Optimizer

Automatic LED Candle Light Circuit

Last Updated on June 1, 2026 by Swagatam 18 Comments

The post describes a simple 220V  mains transformerless LED candle light circuit which switches ON automatically in the absence of ambient light in the room and vice versa. The idea was requested by Mr. Don Technical Specifications I only dabble with electronics here and there but in trying to move from incandescent and CFL’s to […]

Filed Under: Lamps and Lights Tagged With: Automatic, Candle, LED, Light

Automatic Bathroom/Toilet Engage Indicator Circuit

Last Updated on June 1, 2026 by Swagatam 8 Comments

IMG 1200 2

In this post I have explained a very simple automatic bathroom/Toilet Engage indicator circuit which can be installed with any relevant door bolt for implementing the actions. The idea was created and submitted by Mr. Sandipan. The Design I have one more idea that need your help. I would like to implement is at my […]

Filed Under: Indicator Circuits Tagged With: Automatic, Bathroom, Engage, Indicator, Toilet

Automatic Evaporative Air Cooler Circuit

Last Updated on May 28, 2026 by Swagatam 10 Comments

automatic2Bcooler

In this post we study a simple moisture sensor circuit which enables an evaporative air cooler to automatically restore the wetness level of its evaporative pad by detecting its moisture level and by activating the water pump accordingly. The idea was requested by Mr. Ankur shrivastava Technical Specifications sir could you please help me to […]

Filed Under: Home Electrical Circuits Tagged With: Automatic, Cooler, Evaporative

3-Step Automatic Fast Battery Charger/Controller Circuit

Last Updated on May 24, 2026 by Swagatam 272 Comments

3stepbatterychargercircuit

Generally it is noticed that while charging batteries people hardly pay any special attention toward the procedures. For them charging a battery is simply connecting any DC supply with matching voltage with the battery terminals. A fast battery charger circuit charges a battery with enhanced speed so that it is charged in less time than the specified period. […]

Filed Under: Battery Charger Circuits Tagged With: Automatic, Battery, Charger, Controller, Fast, Step

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