- #1
jmcafee
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Your opinion, please. Does one of the two variations of this circuit offer a clear advantage, or is it a wash (see attached)?
This indicator circuit turns on the LED below 11V (set by the zener). The LED cathode must be at ground (it is actually part of a tri-color LED with a common cathode), so it cannot be in the collector circuit of an NPN.
Any suggestions on the transistor biasing?
Thanks for your comments.
This indicator circuit turns on the LED below 11V (set by the zener). The LED cathode must be at ground (it is actually part of a tri-color LED with a common cathode), so it cannot be in the collector circuit of an NPN.
Any suggestions on the transistor biasing?
Thanks for your comments.