On Mon, February 26, 2018 2:29 pm, Tom Van Baak wrote: > BTW, a trick for blinking LED's -- use two of them out of phase: one that > the user sees on the front panel and one that is blacked out or hidden > inside. A flip-flop (Q and /Q) or even a set of inverters is all you need. > The current draw thus remains constant in spite of the blinking.
You could also use a long-tail diff-pair, with the LED in the collector circuit of just one side of the pair. Only costs one extra transistor and a few resistors and then the current draw is (close to) constant whether the LED is on or off. -- Chris Caudle _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
