5V transformerless Power Supply

Posted on Mar 28, 2013

I use this power supply for applications that doesn't use too mucho power. It can provide power to circuit that uses less than 100mA without any problem. The disadvantage of this circuit is the danger of an electrical shock, so it cannot be used if the circuit is in contact with the user. The voltage supplied by this is determined by the zener diode. The version of the transformerless power supply that uses a bridge rectifier provides more current than the first one because it rectifies both phases of the AC voltage. Do not use it for 250VAC. It is dangerous! In fact, DO NOT BUILD THIS PROJECT.

5V transformerless Power Supply
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    High Voltage High Current Power Supply
    2-Wire LCD Interface using PIC16C84
    Ultra Low Power LCD Indicator
    Lesson Plan for Modulated Laser Laboratory
    PC Controlled RC Car
    88-89 Prix 3-Piece AM/FM/Cassette/EQ
    Automatic Garage / Shed Alarm
    5-channel low-power programmable sensor signal processor with AD7714 circuit