Positive voltage to negative voltage converter

Posted on Feb 6, 2014

This circuit diagram shows how to obtain a negative voltage from a positive voltage supply. Another advantage of this circuit is that, the negative voltage together with the original positive supply can be used to simulate a dual supply. The circuit is based on timer IC NE555. The NE555 is wired as an astable multivibrator operating at around 1 KH

Positive voltage to negative voltage converter
Click here to download the full size of the above Circuit.

z. The square wave output if available at pin no 3 of the IC. During the positive half of the square wave, capacitor C3 charges through diode D2. When the output of IC is at zero the C3 discharges through diode D2 and the capacitor C4 gets charged. As a result of this the voltage at the junction of the anode of D1 and cathode of C4 will be always negative with respect to the ground.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    LED dimmer circuit
    Electronic Voltmeter Ammeter Circuit Using Single IC 741
    NPN BJT in saturation base voltage irrelevant
    Amp Power Supply More Info
    Low Resource Microcontroller 3 Phase BLDC Motor Speed Controller
    Temperature compensation of the symmetrical power supply 7812 F007C
    Real-time speech recognition system application circuit in family care robot