Wiring Dual Activity Leds
Posted 31 August 2005 - 01:15 AM
Posted 31 August 2005 - 01:24 AM
You would need to setup a relay or transistor setup if you want 1 lot to turn off when the others come off. It will be a bit of work.
Running too many LEDs from the IDE pin 39 for the hard drive will kill the hard drive. 1 is ok, but any more than that is just putting ur hard drive at risk.
Posted 31 August 2005 - 01:51 AM
Posted 31 August 2005 - 02:11 AM
Posted 31 August 2005 - 02:17 AM
Haha thanks man The only reason I know any of this is because my family used to take long road trips when I was really young and I had one of those 200-in-1 project labs from R-S, and I made and understood every circuit in there, so something like this seems easy. For anyone who cares, this circuit is called a 'Window Comparator" ... I think thats how you spell it
Posted 31 August 2005 - 03:37 AM
Posted 31 August 2005 - 04:26 AM
edit: this would work for the hdd activity also??
Edited by OmegaX, 31 August 2005 - 04:29 AM.
Posted 31 August 2005 - 02:12 PM
This exact circuit wouldnt because this one changes when the input is high or low (5v or 0v). Im pretty sure the IDE activity line is floating when no activity and low when there is activity (can anyone correct me on this?). If you go to my old thread here and go to the last page, there is a schematic that will work for you. Just connect the 'trigger' wire to pin 39. Let me know if you need a better schem drawn up.
Posted 01 September 2005 - 10:04 PM
Note that you might have to play around with the limiting resistors a bit (R1 and R2) because you are using white and yellow, not blue and yellow.
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