Raspberry Pi and Buttons
There are many websites that will walk you through how to add a push button to a raspberry Pi. However, I only saw one that said you should add a capacitor. I thought that was a bit over kill for a peace of wire that is about 20 cm long. How could that act as an antenna and receive random transmitting singles?
Then I built the intermittent fan controller, which uses 20 cm of wire as an antenna to allow the signal from toggling the GPIO pin on and off to go from a reach of 3 inches to over 30 ft. That is when it dawned on me that you should add a capacitor to a push button. Those wires really can act as an antenna.