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| First time building a custom Control Panel - help :) |
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| PL1:
Usable hole saw sizes are listed on the Ultimarc site. As hole saw sizes get larger, the commonly-available steps get larger. Not sure how much current the Ultralux 5v LEDs draw, but they probably draw at least 25mA. 25mA * 18 buttons = 450 mA Add to that the trackball lighting and you're almost certainly over the USB spec of 500mA. If you can power half from one USB port and half from a USB port that doesn't split the available 500mA, you should be fine. Worst case scenario, you can add a secondary current limiting resistor to reduce the current draw. The difference between 5v and 12v LEDs is the size of current limiting resistor. Scott |
| swirlee:
To avoid using my laptops USB ports for the LEDs couldn't I just plug the LEDs into one of these? And then just have the trackball connected to my laptop via USB? |
| PL1:
That looks good as long as the LEDs aren't drawing more current than the adapter is rated for. You could also cut out the USB cable and just use a 5v wall wart or adapter with a high enough amperage rating. ;D Scott |
| swirlee:
--- Quote from: PL1 on April 08, 2014, 07:59:53 pm --- You could also cut out the USB cable and just use a 5v wall wart or adapter with a high enough amperage rating. ;D Scott --- End quote --- Oh damn, there we go... what little adapter would you use to connect the daisy chain LED wires to this adapter? Thanks! |
| PL1:
Cut off the round connector and use a euro-style terminal strip FTW. Scott |
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