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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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