12 Volt Power Supplies

Posted on Nov 19, 2012

4 simple 12Vdc power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very simple to construct and will function without problems if you respect the maximum power supply ratings.

12 Volt Power Supplies
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12 Volt Power Supplies - image 1
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12V BD139 power supply circuit LM7812 power supply schematic A very simple PS circuit with the basic 3 Amper version of LM7812 IC. LM317 variable power supply circuit 2N3055 adjustable power supply schematic This PS circuit has a over-current protection and a good stabilized voltage. It can deliver up to 1.6 A.

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