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Automatic Curtain Open-Close Circuit

Last Updated on February 28, 2025 by Swagatam Leave a Comment

We are happy to share an automatic curtain control circuit kindly provided by Mr. August Peterson. This design helps to open and close curtains by sensing light from the surroundings. It uses an LM393 comparator, a solar panel as a light sensor and a 24V motor. The circuit makes the curtain open in the morning […]

Filed Under: Motor Controller Tagged With: Automatic, Close, Curtain, Open

Simple Remote Controlled Curtain Open/Close Circuit Diagram

Last Updated on January 17, 2025 by Swagatam 23 Comments

remote controlled curtain open close circuit diagram

In this article I will explain a simple curtain controller circuit designed by me which can be used to control the opening and closing of a curtain through a remote control. Overview Referring to the circuit diagram in your screen, we can see there are just two relays employed for implementing a remote controlled opening […]

Filed Under: Remote Control Circuits Tagged With: Close, Controlled, Curtain, Open, Remote, Simple

Letter Box Open Indicator Circuit

Last Updated on January 1, 2024 by Swagatam 16 Comments

letter box open LED indicator

In this post I have explained how to build a letter box open indicator circuit, which indicates through an LED if the letter box had been opened either by the postman, or by somebody else! The idea was requested by Mr. Bill. I wonder if you could help me.I want to make an LED indicator […]

Filed Under: Home Electrical Circuits Tagged With: Indicator, Letter, Open

Build this Open Baffle Hi-Fi Loudspeaker System with Crossover Network

Last Updated on November 3, 2022 by Swagatam 6 Comments

tech spec

The open baffle hi-fi, high quality speaker design introduced here provides a substitute to the common loudspeaker housing. Its sound emission pattern resembles electrostatic pattern. It works without enclosure or housing for the woofers, although employs normal dynamics for the drive units. The reproduction provides extremely ‘spacious’ impact on the ears. Contributed by: Monty Trivedi […]

Filed Under: Audio and Amplifier Projects Tagged With: Baffle, Build, Crossover, Loudspeaker, Open, System

Simple Gate Open/Close Controller Circuit

Last Updated on August 6, 2024 by Swagatam 82 Comments

gate2Bopen2Bclose2Bcircuit

The simple gate open and close controller circuit is designed to operate the gate through a couple of push buttons manually, it can be also modified for implementing the activation through a remote control. How it Works Referring to the shown, simple gate open, close controller circuit below, we can witness a rather straightforward configuration, […]

Filed Under: Motor Controller Tagged With: Close, Controller, Gate, Open, Simple

Make this Simple Refrigerator Door Open Alarm Circuit

Last Updated on January 3, 2024 by Swagatam 25 Comments

This presented refrigerator door open alarm circuit which alerts you after a period of time whenever your refrigerator door is left open. This circuit becomes very handy, because in case the door is left due to carelessness may cause significant increase in the consumption and affect the life of the fridge. Circuit Operation This circuit […]

Filed Under: Security and Alarm Tagged With: Alarm, Door, Open, Refrigerator, Simple

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