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DC Shunt Motor Controller Circuit using Variac

Last Updated on May 4, 2021 by Swagatam 4 Comments

motor control using a variac compressed

The simple DC shunt motor controller circuit presented in the following article uses a variac. This design facilitates an instant stopping of the motor at any stage with a flick of a switch, along with reversing the motor direction. It also provides speed control for the motor with a high level of accuracy. Overview TRIAC […]

Filed Under: Motor Controller Tagged With: Controller, DC, Motor, Shunt, Variac

Easy H-Bridge MOSFET Driver Module for Inverters and Motors

Last Updated on July 5, 2024 by Swagatam 51 Comments

universal H bridge mosfet driver compressed

If you are wondering if there’s an easy way to implement an H-bridge driver circuit without using the complex bootstrapping stage, the following idea will precisely solve your query. In this article I have explained how to build an universal full-bridge or H-bridge MOSFET driver circuit, using P-channel and N-channel MOSFETs, which can be used […]

Filed Under: Inverter Circuits, Motor Controller Tagged With: Bridge, Driver, Easy, Inverters, Module, MOSFET

Constant Torque Motor Speed Controller Circuit

Last Updated on May 27, 2022 by Swagatam 28 Comments

motor speed with constant torque

In this post I have explained a DC Motor controller which features a constant torque compensation for enabling the motor to run at a consistent speed irrespective of the load on it. Drawback of Ordinary Speed Controllers One drawback of the majority of simple speed controllers is they only provide the motor with a predetermined […]

Filed Under: Motor Controller Tagged With: Constant, Controller, Motor, Speed, Torque

Motorcycle Button Start Locking Circuit

Last Updated on July 6, 2019 by Swagatam 2 Comments

speed2Blimit

In this post I have explained how to modify an existing button start system in motorcycles so that it’s disabled as soon as the engine has started and gained the required minimum amount of RPM. The idea was requested by Mr. Jordan Circuit Requirements I just discovered your splendid site/blog with focus on education about […]

Filed Under: Automobile Electronics Tagged With: Button, Locking, Motorcycle, Start

2 Simple Bidirectional Motor Controller Circuits Explored

Last Updated on January 19, 2025 by Swagatam 22 Comments

motor2Bspeed2Bcontroller2Bcircuit

A circuit which allows a connected motor to operate in clockwise and anticlockwise directions through alternate input triggers is called a bidirectional controller circuit. The first design below discusses a Full bridge or H bridge based Bidirectional motor controller circuit using the 4 opamps from the IC LM324. In the second article I have explained […]

Filed Under: Motor Controller Tagged With: Bidirectional, Circuits, Controller, Explored, Motor, Simple

5 Simple DC Motor Speed Controller Circuits Explained

Last Updated on September 13, 2024 by Swagatam 409 Comments

PWM motor control circuit

A circuit which enables a user to linearly control the speed of a connected motor by rotating an attached potentiometer is called a motor speed controller circuit. 5 easy to build speed controller circuits for DC motors are presented here, first one using MOSFET IRF540, second one using IC 555, the third concept with IC […]

Filed Under: Motor Controller Tagged With: Circuits, Controller, DC, Motor, Simple, Speed

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