20mA constant current
For a project I need to have a controlled current of 20mA (tolerance abt 10
%) for connection at the output of an IC that is giving a 1 Hz pulse,
voltage between 5 and 12 VDC, as low-cost and easy as possible...
The next component connected to that output will die if it must eat more
than those 20mA.
Some links or ideas would be helpful.
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