Original power switch from Michael Ruppe (link below) adjusted to be used in an Arduino configuration. When the push button (NO) is pressed, the Arduino (displayed as the V meter) senses current (reduced voltage with a voltage devider). The Arduino is programmed to trigger an action on a short press. On a "press and hold"
the Arduino switches off the Voltage applied to the lower transistor, thus turning of the circuit. https://www.youtube.com/watch?v=0IjJH3ksqfs&lc=z23af3cy5mnqtv1vwacdp435otf4d1ekb1goh4jd5alw03c010c.1514537351567456
