A momentary switch
grabcad
This momentary switch operates with a single burst of static pressure, triggering an output signal and activating subsequent schematics. Cessation requires the same action. A 555 timer in flip-flop mode is employed; schematics are attached. Mechanically, it uses a membrane deforming under pressure and a spring for backstroke. Watch the Proteus-made video at http://youtu.be/wf6H1wfDAX8. Dimensions are 14x14x7 mm, with options for normally closed or opened configurations.
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