or Connect
Styleforum › Forums › General › General Chat › Anyone good with electronics/circuits?
New Posts  All Forums:Forum Nav:

Anyone good with electronics/circuits?

post #1 of 3
Thread Starter 
I want to build a little box with a timer that runs a fan for a few hours and then shuts off.

I'll be using a 120mm computer case fan at something between 7-12V...right now, I can run it off a 9V battery but they don't have a ton of stored energy and I have to remember to turn it off. My design will probably use 6 AA/AAA batteries to spin the fan at a medium speed (although this might be too much voltage for the timer circuit).

I need to design a circuit that will use some sort of timer chip to run it for an arbitrary amount of time (6-12 hours...doesn't even need to be adjustable) and then shut off. I am comfortable soldering and reading circuit diagrams but I am not familiar with the sort of ICs that do this. I've used 555 timers but I don't think they are right for this situation.

Anyone have any IC/circuit suggestions? Know any other good forums where I could pose this question?
post #2 of 3
I've never used this IC, but you may give it a go

http://www.reuk.co.uk/Timer-Circuits-With-4060B.htm
post #3 of 3
Thread Starter 
Ooh thanks, that looks like it does almost exactly what I want (except it does it backwards). If I flip the relay around, it should do what I want.

It looks a little complicated but I think I could put it together.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: General Chat
Styleforum › Forums › General › General Chat › Anyone good with electronics/circuits?