MK3a Auxiliary Components



US Digital Optical Encoder, coupled with a pick-off wheel from McMaster-Carr.
(See for close-up pics of how to wire it up the Mk3a board.)


CCFL flourescent light tube, 12vdc, from All-Electronics


CCFL 12vdc inverter to power the CCFL flourescent light tube.


Stepper motor from Jameco
For wiring connections, click here for schematic.

and here for CW and CCW connections.


Stepper motor controller from WZ Micro


Connections from MD-1 Stepper Controller to the MK3a board


PCI Lava card for an LPT2 parallel port, available from LavaLink www.lavalink.com .


Typical 10-turn Bit Twiddling potentiometer attached to the MK3a board. Pot connections may vary for different pot manufacturers.
This connection gives me a clockwise rotation to increase exposure.


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