Electronics > Beginners

Soft push button using latching switch

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jiko:
Hi,

I am planning to convert my wall switches to push buttons so I can use them in my smart-home system. I came across to EEVblog #262 - World's Simplest Soft Latching Power Switch Circuit, but I need to do the opposite. Is there a schematic that uses passive only components to convert a simple SPDT to a momentary push button?

Thank you for any input.


Edit: Every time the switch changes position an active high pulse of 3V and duration ~500 ms should be fired.

mikerj:
You need to describe how you want this to work, e.g. do you want a pulse of fixed duration every time the switch position is change changed, a pulse when moved to one position but not the other, do you want active low or active high pulse, what voltage etc..

sokoloff:
Why restrict yourself to passives only? That rules out a whole bunch of solutions that may be beneficial.

KL27x:
Sounds like a homework assignment.

jiko:

--- Quote from: mikerj on July 08, 2019, 09:09:34 am ---You need to describe how you want this to work, e.g. do you want a pulse of fixed duration every time the switch position is change changed, a pulse when moved to one position but not the other, do you want active low or active high pulse, what voltage etc..

--- End quote ---

Hi mikerj,
Thank you for your reply. Every time the switch changes position an active high pulse of 3V and duration ~500 ms should be fired.
Thanks

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