How to Wire Additional Loads to RAMPS

• You can use AUX-1 (set of 4 header pairs, containing 4 digital pins, 2 ground, 2 power (5V)

See video:

• Use, say, D57:

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• The M Code is M42 - such as:

M42 P57 S200 for 200 of 255, and 0 to turn it off.