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Unread 18-02-2013, 00:20
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Re: Jitter/noise on limit switches connected to digital inputs on sidecar

The added load of 8 1000 ohm pulldowns is negligible compared to the 3 amp 5v power supply.

However, a common problem is to not supply 12v to the digital sidecar, so the 5v supply doesn't function. In this case, leakage through the 37 pin cable can let the digitial sidecar partially function, but not reliably. With everything disconnected except the power cable, are all three power LEDs brightly lit?

Another common problem is a small metal shaving shorting 5v to ground.
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