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Newly Updated Circuit Projects:

433 MHz RF 8 Appliances Remote Control Circuit

Last Updated on March 16, 2021 by Swagatam 90 Comments

In this post I have explained a circuit which can be used for controlling 1 to 8 appliances with a single RF 433MHz remote control handset. Now you can control fans, lights ACs, oven etc within a range of 50 meters with the same remote. In a few of my earlier posts I have comprehensively […]

Filed Under: Remote Control Circuits Tagged With: 433, Appliances, Control, Remote, RF

Simple 50 Watt Power Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 14 Comments

50watt

A simple 50 watt amplifier circuit is I have explained below, I have explained how to build it at home using this versatile single amplifier chip LM3876T By: Dhrubajyoti Biswas UPDATE: For 40 watt amplifier circuits please visit this link. Analyzing the Circuit A good power amplifier is a necessity, especially when it comes to […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Power, Simple, Watt

Remote Controlled Submersible Pump Circuit

Last Updated on January 1, 2024 by Swagatam 10 Comments

2channel

In this article I have explained a simple remote controlled submersible pump circuit which could be simply configured using any standard 2 channel 433MHz remote control modules. The idea was requested by Mr. James Smith Circuit Objectives and Requirements I have read a lot of your post and have successfully implemented them several times. Now […]

Filed Under: Remote Control Circuits Tagged With: Controlled, Pump, Remote, Submersible

Raspberry Pi Explained

Last Updated on May 14, 2026 by Swagatam 2 Comments

In this article I have explained about Raspberry Pi single board computer, their specifications, how to use them in a project, we are also going to do a small comparison between Arduino and Raspberry Pi, so that we can choose which of them are best for your projects. What is Raspberry Pi? Raspberry Pi is […]

Filed Under: Arduino Projects Tagged With: Explained, Raspberry

Fish Aquarium Oxygen Generator Circuit

Last Updated on June 1, 2026 by Swagatam 53 Comments

bottle

In this article I have explained how to make a simple fish aquarium oxygen generator circuit using the concept of electrolysis of water. Generating Pure Oxygen The production of oxygen through electrolysis can be expected to supply a pure and a bigger quantity of oxygen compared to the usual pumped air concept which injects only […]

Filed Under: Lamps and Lights Tagged With: Aquarium, Fish, Generator, Oxygen

Simple 20 watt Amplifier Circuits

Last Updated on May 15, 2026 by Swagatam 29 Comments

202Bwatt

This article is written with an intent to build a simple 20 Watt Amplifier. All the amplifier circuits presented below will provide a full output power of 20 watts into 8 Ohm loudspeaker. By: Dhrubajyoti Biswas Why a Single Ended Class-A Amplifier A single-ended Class-A amplifier is probably one of the best example when it […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Circuits, Simple, Watt

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