Circuit Project Electronic

This is a very useful project for anyone working in electronics. It is a versatile power supply that will solve most of the supply problems arising in the everyday work of any electronics work shop. It covers a wide range of voltages being continuously variable from 30 V down to 3 V. The output current [...]

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This is Circuit Power supply regulator Current 3Amp Voltage output : 1.2V-20V and 3V,6V,9V,12V.
Use IC LM317T and 2N3055, Easy to Bulid and normal part low cost too. detail see in circuit image.
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This circuit linear power supply 13.8V 25Amp, I see to in Web:
http://www.raunvis.hi.is/~matti

This is my 13.8V 25Amp power-supply. With over-current (26 Amps) and over-voltage (16 Volts) protection.
Uses fold-back current limiting.
Short circuit current is around 8 Amps.
Uses 3 (or 4, which is better) IRF150n power MOSFETs as pass transistors. LM723 can drive the MOSFETs directly.
Needs big heat-sink, [...]