Controlling a DC Motors Direction Circuit with IC 555 Timer is easy to try. Circuit is good for automation, robotics, devices needing forward and backward move. Circuit has 555 timer, transistor, DPDT relay to change direction. Simple design is easy to build and works in both directions. 555 timer make astable output to control relay […]
IC CD 4093 Based PWM DC Motor Controller Circuit
IC CD 4093 Based PWM DC Motor Controller Circuit control motor speed and save power. Change PWM duty cycle to adjust motor speed by changing voltage. Circuit use CD 4093 NAND Schmitt trigger and MOSFET for smooth running. Use 12V power supply and 5A for this circuit. Circuit Working: Parts List: Component Specification Quantity Resistors […]
Motor Speed Regulator Circuit for PCB Drills
This tutorial is about Motor Speed Regulator Circuit for PCB Drills It control speed for clean and accurate holes. Main part of the circuit is LM3578 IC with feedback and 1V reference. It also has oscillator. LM3578 and IRF540 MOSFET adjust motor speed. They give smooth, adjustable speed for small PCB drills. Supply is from […]
Simple TDA7274 Based Low Voltage Motor Speed Controller Circuit
Simple TDA7274 Based Low Voltage Motor Speed Controller Circuit is useful and easy to make. Circuit is efficient and precise with speed adjust. TDA7274 IC is motor driver for low voltage and for low power DC motors. It works from 1.8V to 6V and has built-in voltage reference. Output is up to 700mA and is […]
Temperature Controlled Fan Circuit for Audio Amplifiers
Amplifiers make heat when working. Too much of heat make it work bad and can die soon. This Temperature Controlled Fan Circuit for Audio Amplifiers keep amplifier cool. Fan starts only when amplifier is hot. If volume is low and less heat then fan stays OFF and saves power. The circuit is made with LM311 […]
Transistor Based H-Bridge Motor Controller Circuit
Transistor Based H-Bridge Motor Controller Circuit controls DC motor spin both ways like clockwise, anticlockwise. The circuit helps control speed and direction by easy switch method. Name “H-Bridge” comes from shape like letter H which has 4 switches. In this post circuit is 4-transistor H-Bridge. Circuit is good for robotics, automation and other motor projects. […]