DC Voltage Regulator Circuit

Posted on Feb 7, 2014

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). The circuit works this way: the A1 opamp function

DC Voltage Regulator Circuit
Click here to download the full size of the above Circuit.

s 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. The P1 sets the trigger point of the pulse. The transistor T1 works as the actual regulator by switching a relatively high current with a maximum of 5 amperes. The power supply voltage must be between 5 volts (minimum) and 30 volts (maximum). Take note that the lower the supply voltage is, the lower the efficiency of the dc regulator becomes.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Audio Line preamp Driver
    Connecting an MSP430 to ADS1248 via SPI
    555 metal detector
    sound activated lamp relay switch
    Fastest Finger First Indicator
    SG3524 wiring circuit
    Discrete components sound and light control stairs delay switch circuit 5
    Single multi-lamp switch control circuit 2