Auto off for any circuit

hackaday.com 17 Mar '13, 12pm

Auto off for any circuit

Properly configured, your computer will go into sleep mode when left unattended for a long enough time. So will your cell phone, and just about every other piece of sufficiently complex electronics. Much simpler circuits, though, are left at the mercy of a SPST switch; if you forget to turn a flashlight off, it will be dead next time you need to use it. Wanting an auto-off circuit simple electronics, [Kyle] threw together this auto shutoff circuit . The basic idea behind the cirucuit is to use a microcontroller as a timer controlling two transistors. When [Kyle]‘s circuit is power cycled, the timer inside an AVR starts, making a pin high, and when the timer is up, making the pin low again. This pin feeds into a PNP transistor which is in turn connected to a NPN transistor, creating a very tiny auto off circuit for anything with an SPST switch. [Kyle] says there are a few i...

Full article: http://hackaday.com/2013/03/17/auto-off-for-any-circuit/

Tweets

@shanepainter » 18 Mar '13, 2am
Very Handy - Auto off for any circuit [link]
@TweakersDelight » 17 Mar '13, 4pm
Auto off for any circuit Properly configured, your computer will go into sleep mode when left unattended for a long e [link]
@WaseemKhayer » 17 Mar '13, 1pm
RT @hackaday: New post: Auto off for any circuit [link]
@IoTFeed » 17 Mar '13, 12pm
Auto off for any circuit: Properly configured, your computer will go into sleep mode when left unattende... [link] #iot
@NinjaNeuro » 17 Mar '13, 12pm
#neuro Auto off for any circuit [link]
@GeekHugger » 17 Mar '13, 12pm
Auto off for any circuit [link] via @hackaday
@MossadBlackWolf » 17 Mar '13, 12pm
Auto off for any circuit: Properly configured, your computer will go into sleep mode when left unattended for... [link]
@hackaday » 17 Mar '13, 12pm
New post: Auto off for any circuit [link]
@hackadayrss » 17 Mar '13, 12pm
Auto off for any circuit [link]
@stevesandersonf » 17 Mar '13, 12pm
Auto off for any circuit [link]
@robofun » 17 Mar '13, 12pm
Auto off for any circuit [link]