Circuit - single interface with auxiliary channels

Third generation - updated interface supporting up to eight motor channels for Armdroid II or later models.

Essentially backwards compatible with previous generations, but supports two additional channels allow external devices to be driven - for example conveyor or rotatory carousel systems.

Auxiliary channels are selected by motor addresses 0 and 7 respectively.

View from Above
View from Below
(photographs used with permission)

This example was manufactured in 1987.  These boards included a solder mask coating which wasn't the case with earlier versions.

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