switches Can I achieve a one shot button without a 555


Posted on Feb 7, 2014

A relay, which is energised by pulling the low side low using an NPN. I would like a pushbutton to operate the transistor (and therefore the relay) for a time (500ms ish) then deactivate it and wait for the next push (ignoring the button if held). I understand how I can achieve this using timers (or a MCU), but I was hoping there might be a more simple and compact solution.


switches Can I achieve a one shot button without a 555
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