What current?  I typically use a 7805 with a resistor between the output of
the device and the control, using the control as the output.  Output
current will be 5/R plus the control current.

Marshall

Dave Rogan wrote:

> Ole Bob made a constant current circuit for me a while back. I need to
> make another one but cannot find his plans online with google. Does
> anyone know where theplans are?
>
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