If you’ve ever opened up any electronic toy you’ve likely encountered the area below where any physical pushbutton was located to look something like this:
Now if you wanted to circuitbend that component and possibly transport it to another device or chassis where the momentary pushbutton is no longer present, you could still trigger the switch with several (many, actually) methods. Some possible solutions include using a digital pin to act as the trigger, or even a 4066 IC which is itself a quad bilateral switch. Here are some sample videos below and full instructions here at little-scale’s blog:
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