Am Montag, 8. Mai 2006 00:10 schrieb Wizard:
> hey guys I am having a few problems (user error i know ) I can get a
> DS2408 to toggle on or off a led or a relay. but i cant seem to get
> it to sense weather the door is open or closed. using magnetic switches
> on the doors to a relay because the door magnets work backward. break
> connection when door open. I was trying to use a relay to take ground to
> pio of ds2408 so it will see door open or closed.
>
Huh? Why don't you connect the switches directly between PIO.n and GND? You
just have to change the meaning in software - no additional hardware needed.
(Don't forget a 100k pullup between each PIO.n and Vdd)
> Also i have been playing with a ds2406 T0 package using data line to
> pin 2 ground to pin 1 pin 3 to 250 ohm res and then the negative on
> led +5 volts on the other side.
>
That should let you switch the LED on and off by software.
Kind regards
Jan
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