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Furnace Vent Controller Circuit Diagram

Last Updated on January 17, 2025 by Swagatam Leave a Comment

This interesting furnace vent controller circuit was designed and submitted to me for publication by a dedicated reader of this blog and a keen electronic enthusiast Mr. August Peterson. I am extremely thankful to Mr. August for his very useful and generous contribution to this site. Here’s the email sent by him, with the technical […]

Filed Under: Temperature Controllers Tagged With: Controller, Furnace, Vent

TV Antenna Amplifier Circuit Diagram to Boost TV Signal Reception

Last Updated on January 17, 2025 by Swagatam Leave a Comment

The following useful circuit of a TV antenna amplifier was sent to me by an avid reader of this blog Mr. Miljenko Farkas. I am extremely grateful to him for his kind contribution to this site. Here’s what he wrote in his email: Overview So this antenna amplifier is made to really enhance how well […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Antenna, Boost, Reception, Signal, TV

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

Convert any H-Bridge Inverter to Sine Wave H-bridge Inverter

Last Updated on August 3, 2024 by Swagatam 26 Comments

convert h bridge to sine wave h bridge basic layout

In this post we’ll discuss how to convert any ordinary square wave H-bridge inverter into an almost pure sine wave inverter circuit. Basic Concept The idea is simple, just chop the low side MOSFET gates of the H-Bridge with reverse SPWM (Sinusoidal Pulse Width Modulation) waveform. This will force the low side 50 Hz, or […]

Filed Under: Inverter Circuits Tagged With: Bridge, Convert, Inverter, Sine, Wave

Pump Motor Timer Circuit Diagram with Dry Run Protection

Last Updated on January 17, 2025 by Swagatam 19 Comments

Pump Motor Timer Circuit with Dry Run Protection

In this post I have explained about a circuit which can be used to monitor and detect the presence of municipal water supply by operating a pump motor through an intermittent ON/OFF timer. The timer keeps the pump motor ON for 15 seconds, if water is not detected, the pump is switched OFF for the […]

Filed Under: Water Controller Tagged With: Motor, Protection, Pump, Timer

Automatic Door Controller Circuit Diagram using a Single Push-Button

Last Updated on January 17, 2025 by Swagatam 17 Comments

door controller circuit

This door controller circuit works in this way: Initially the door is in the closed state. When a push button is pressed, the door begins opening until it reaches the end of the course. When it reaches the end, it automatically reverses its direction and now the door begins closing. It keeps moving until it […]

Filed Under: Motor Controller Tagged With: Automatic, Button, Controller, Door, Push, Single

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