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- Switching 12v
September 13, 2005, 1:28 am
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Little to nil knowledge of digital logic.
I need to switch 12v at say 100ma across 10 wires at around 1sec each . I
must be able to start and stop the switching by applying around10v.
(No not an assignment, I need to do it for me :)
Could anyone point me to a webpage /circuit design source please ?
Re: Switching 12v
I am assuming you want the 10 wires to "take turns" at being energized?
If so, have a look at this site:
It has 10 outputs (via a 4017 Decade Counter IC) which take turns one at a
time. It requires a clock input (high/low) to time the outputs. Instead of
LED's connected to each of the 10 outputs of the IC (like that shown on the
site), you can connect a resistor and transistor to each of the outputs to
switch current such as 100mA. If you're not familiar with this, I have
provided another link below...
http://www.kpsec.freeuk.com/trancirc.htm#chip - "Connecting a transistor to
the output from a chip".
Hope this helps.