Since it’s not desirable to use a power supply that’ll let the smoke out of everything it powers (or itself, for that matter) a constant current sink, or load, can help determine the operating ...

[tangentsoft] built a jig to test six LM317 regulators in constant current mode set to 0.125A and ... a regular Aavid TO220 heat sink, a set of 4 pennies bolted, a single penny epoxy glued and ...