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1  Topics / Science and Measurement / Re: Leonardo Response Box (Reaction Time) on: October 31, 2012, 08:58:53 pm
What kind of resolution do you need? 1ms? 0.1ms?

I suspect the most difficult part will be characterizing the latency of the USB comm from PC to arduino. Specifically, how will the arduino know with accuracy when the stimulus was presented. I know USB protocols vary widely in their timing allowances, but not exactly what the leonardo is capable of.
2  Using Arduino / LEDs and Multiplexing / Re: multiplexing 8x8x8 led cube on: August 26, 2012, 09:06:39 pm
I don't promise I'm right, but that looks like it should work. Pretty sweet, actually.
One drawback being that your duty cycle will be 1/64, instead of 1/8. You may be able to compensate by overdriving the LEDs.
3  Using Arduino / Sensors / Re: Insulated touch / close proximity sensor? on: August 26, 2012, 10:42:31 am
Capacitive sensors are normally (nearly always) used electrically isolated from human contact. Some things that might help are:
- keep the glass thin, if possible
- sensor pads not too small
- if you get too much cross talk, add separation or a ground line between the buttons (not electrically connected)
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