Timer inverter

Hi there, I am currently having a problem with a timer circuit I need to produce. Basically I have a trigger for the input, and at rest I need the output high, and when the trigger is pressed the output must stay high, then go low for 3.5s when the trigger is released. I need an inverter on the end but that part isn't a problem. Thanks for any help.

by wscott97
October 18, 2018

Not clear. Could you provide a diagram and waveforms, please?

by mikerogerswsm
October 19, 2018

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