13 Volt 20 Amp with current limiter


Posted on Apr 20, 2012

This PSU has been especially designed for current-hungry ham radio transceivers. It delivers safely around 20Amps at 13.8V. For lower currents, a separate current limiting output, capable of 15ma up to a total of 20A has been added.


13 Volt 20 Amp with current limiter
Click here to download the full size of the above Circuit.

The power transformer should be capable to deliver at least 25A at 17.5 to 20V. The lower the voltage, the lower power dissipation. The rectified current will be ironed by the C1, whose capacity should not be less than 40.000uF, (a golden




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good but i need help   Feb 18, 2008

hi, there. seen your design, its pretty much impressive but i would be really glad if you can provide me help in slightly similiar project like that: in which I am suppose to use ( Over current motor protection - using hall effect), 12 votls dc... Please let me know a.s.a.p. thanks sadiq

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