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PWM and power control circuit diagrams

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Stepper Motor Controller
Stepper Motor Controller
December 9, 2010

his circuit is built from standard components and can easily be adapted to be controlled by a computer. If you use cheap surplus transistors and stepper motor, the price of the circuit can be kept... [more]

Pulse Width Modulation DC Motor Control
Pulse Width Modulation DC Motor Control
November 30, 2010

Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter approach works well, it generates heat and hence wastes power. [more]

Simple DC motor PWM speed control
Simple DC motor PWM speed control
November 30, 2010

The 555 Ic is wired as an astable and the frequency is constant and independent of the duty cycle, as the total resistance (R charge + R discharge, notice the diode) is constant and equal... [more]

Solid State Power Controller
Solid State Power Controller
November 30, 2010

The ckt is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0.1 second. Duty cycle can be varied... [more]

DC Motor Control Circuit
DC Motor Control Circuit
November 10, 2010

DC Motor Control Circuit [more]

Fancontrol
Fancontrol
November 7, 2010

Fancontrol [more]

Unipolar Stepper Motor Controller
Unipolar Stepper Motor Controller
October 12, 2010

This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive the motor, one for controlling the direction and... [more]

Temperature-Controlled Soldering Iron
Temperature-Controlled Soldering Iron
October 1, 2010

One reason why commercial soldering stations are expensive is that, in general, they require the use of soldering irons with inbuilt temperature sensors, such as thermocouples. This circuit eliminates the need for a special sensor... [more]


circuit from:http://www.extremecircuits.net/2010/05/temperature-controlled-soldering-iron.html

Varying brightness AC lamp
Varying brightness AC lamp
August 8, 2010

In this circuit, an SCR is used to slowly vary the intensity of a 120 volt light bulb by controlling the time that the AC line voltage is applied to the lamp during each half... [more]

Stepper Motor Controller
Stepper Motor Controller
August 8, 2010

Stepper motors are available in several versions and sizes with a variety of operating voltages. The advantage of this general-purpose controller is that is can be used with a wide range of operating voltages, from... [more]


circuit from:http://www.extremecircuits.net/2010/05/stepper-motor-controller.html



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