This is LM317 Small Power Supply.
The input voltage to the LM317 must be
at least 1.5v greater than the output voltage.
The output is adjustable between
1.25 and 13.5 Volts with a maximum
current limit of 1.5 Amps
A heat sink will be required for most
applications however.
On my picture you can see the heat sink.
Here is a schematic of LM317 supply.
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