...be to rectify the audio from a mike preamp. The DC could then trigger an SCR to turn on/off lights. See active light with sound: https://www...
3 Answers · Computers & Internet · 17/08/2012
Windows Key + U Click 'On Screen Keyboard' Bottom right hand side there is a button says 'NumLock', it will be white if on, black if off.
4 Answers · Computers & Internet · 24/07/2012