• That's OK - the puck.js is battery powered so doesn't have any external power supply.

    I don't think I need to be worried about current from the puck going through my body - even if I made the electrodes sharp enough to penetrate skin in two points (which I think brings body resistance down to about 500 ohms) we're still only talking 6.6mA from a 3.3v battery.

    Your point about static is appreciated (I must admit I've been very lax about the way I handle arduinos, compared to the paranoia with which I handle the insides of PCs!)

    Does touching the ground pin first do anything in this situation (ie when there is no proper route to earth?) Or are you talking about touching a "proper" earth such as a nearby radiator pipe before attaching the device?


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