https://www.youtube.com/watch?v=6DqqiHpltSg
https://www.youtube.com/watch?v=NAl-ULEattw
https://shkspr.mobi/blog/2015/05/idiots-guide-to-getting-started-with-raspberry-pis-gpio-pins/
python for led
Switch Theory
http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/buttons_and_switches/
https://www.youtube.com/watch?v=hSh9vRMeP2s
https://www.youtube.com/watch?v=2yUJLE1PE0Y
https://www.allaboutcircuits.com/projects/build-a-raspberry-pi-pushbutton-switch/
Of a simple switch detect
https://developer.microsoft.com/en-us/windows/iot/samples/pushbutton
Trigger a Webcam With a Button and Raspberry Pi
http://www.instructables.com/id/Trigger-a-Webcam-with-a-button-and-Raspberry-Pi/
this
https://www.raspberrypi.org/learning/push-button-stop-motion/