> I'm loooking for a two terminal constant current device that could be put
> between an LED and a variable DC supply to hold the LED current at 5mA as
> the supply varies over a 0-10V range (recognizing we're not going to get
> it at 0V, but I'd like the widest range possible). So far i've found the
> Central Semiconductor CCLM5750 which is a nominal 5.750mA, but it takes
> 4.5V to get 80% of the rated current. Anyone have other ideas?

Hi Harold,

Would you settle for 8 mA? The 2N5951 (NS, Fairchild) I just tried works
great. My other choice at hand, the MPF102, runs at 15 mA.

Tie gate to either drain or source, use that as the more negative side.

2N5951 available everywhere, in small quantities at Jameco.

Cheers,

Bob

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