Q1 is a simple PNP transistor acting as a pull-down switch until C1 charges and switches off Q1. That should spin up the SATA drive and then surrender pin 11 for drive activity usage.

The Arduino Uno board detects the tattoo artist’s gestures via a distance sensor, and signals the machine with an on or off output. Watch this video on YouTube. Source: AH : WTech ...

Glasgow University researchers have found a new way to use diamond as the basis of a transistor that remains switched off by default – a development crucial for ensuring safety in devices which carry ...