Introduction: Power Supply Variable With Circuit Protection
this is the circuit! :)
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Step 1: The Short Circuit
The protection circuit is activated when a short circuit happens, indicating the red LED andthe voltage down to 0. When you press the push botton resets the circuit! 12v
-power transformer 120v AC/18-16-12v DC 1amp.
-resistor: (3) 2.2k, (2) 1k, 0.5, 10k.
-capasitor: 2200mf/25v, 100mf 25v, (2) 47mf/v.
-diode zener 18v
-resistor variable: 5k
-bd135 and 2n3055
all the components are shown in the circuit diagram.