Hardware at a glance

Applies to the October 16, 2026 V2 socketed DIP design.

Feature	Interface
Host board	Arduino GIGA R1 WiFi
Motion channels	8 STEP/DIR channels
RJ45 outputs	Complementary STEP+/STEP− and DIR+/DIR−, 5 V line-driver supply
DB37 outputs	Single-ended positive STEP/DIR signals for the same eight channels
Replaceable line drivers	Four TI AM26C31INE4, 16-pin PDIP; two axes per IC
Control terminal	J5: GND, LOG2, relay contacts, SWITCH, E-stop, GND
Camera interface	J6 2.5 mm jack; separate meter and shutter contact closures
Shield power	GIGA power rails; no motor-power output
Indicators	Power, eight STEP activity lights, relay drive, LOG2, switch and E-stop input

“5 V” describes the output stage supply, not a guaranteed unloaded-to-loaded voltage at every receiver. LOG2 includes a 1 kΩ series resistor; receiver loading matters. GIGA GPIO itself operates at 3.3 V.

The accessory +5 V pins have no published qualified load budget. Do not power motors or unspecified accessories from them, or back-feed them from another supply. Relay contact load ratings, cable-length limits, board temperature limits and complete-system performance are not yet qualified for this prototype.

The dmc-lite system supports eight axes, without DMC crane virtualization or a DMX output port. The Dragonframe manual lists a 50 kHz maximum STEP rate for the sketch; this is not a measured signal-integrity rating for the shield/cable/receiver combination. See references.

All connector assignments are in wiring. Firmware support is separate from electrical connectivity: SWITCH and E-stop require configuration.