1,5-15V 500mA Power Supply


Posted on Nov 9, 2012

This simple variable power supply circuit has a low production cost and delivers an output voltage between 1,5 V and 15 V with a 500 mA maximum current. Its stabilization is better than 2% if the current consumption do not exceed 350 mA. The variation of the power supply voltage can be made with a potentiometer and when overloading occurs a buzzer sounds a alarm.


1,5-15V 500mA Power Supply
Click here to download the full size of the above Circuit.

T4 compairs the P1 slider voltage with the output voltage. Then the P1 slider voltage is 0,65 V higher than the adjusted voltage, T2 opens, which stops the T3-T5 Darlington base current. The 18V, 1A transformer voltage must be filtered with B1 and C1. When the output current is more then 500 mA, the Bz1 starts the alarm (overloading). Bz1 must be a 24 V type, auto-oscillating.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Dynamic to electret microphone circuit
    Programmable bandpass using twin-t bridge
    Current-monitor
    Crystal Oscillator - Parallel Resonant
    bq51013 Receiver Circuit Restarts
    ac Validate Triac circuit
    Linear RF Power Meter
    Infrared automatic faucet circuit diagram
    Flasher Circuits
    Limited TV channels to increase reception circuit



    Top