78xx POWER SUPPLY

Original source:

Another generic circuit.

Description:

Of all the voltage regulator ICs, the 78xx family is by far the most established. Not surprisingly! It's difficult to get performance this good with so few outside components necessary.

Just like the famous LM317, the 78xx family incorporates automatic shutdown in case of overheating. You can get up to 1.5A of current with a suitable heat sink. No fuse is required.

Problems:

Observe all the safety precautions when dealing with mains powered circuits.

Possible uses:

A regulated power supply for any application.

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