DC voltage regulator circuit

Published:2012/10/11 2:33:00 Author:muriel | Keyword: DC voltage, regulator | From:SeekIC

This circuit regulates a DC power output. It has a very wide application range. It can be used to control the speed of a motor, a pump, a toy train, the brightness of a LED or lamp, etc. Practically, it can be used in any application that uses a regulated DC power with pulse width modulation (PWM). It was originally used as a jumbo LED dimmer.The circuit works this way: the A1 opamp functions as a square wave generator. At its non-inverting input is a by product triangle wave signal. The IC A2 following it functions as a simple comparator. A reference voltage is fed to the inverting input of the A2 IC via the potentiometer P1. The output of A2 is a square wave signal with a constant frequency of around 200 Hertz. This signal has a variable pulse width from 0 to 100%. DC regulator circuit diagram



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