Details on Interfacing with Various Commercial Controller Units

This guide from EA4TX can provide useful information on interfacing with rotator control units that lack an external control port.

Yaesu G1000DXA

Interface to the External Control port on the back.

Manual with schematic

Pin

1. ground to go R (CW) - relay/transistor switching from Arduino cw pin

2. ground to go L (CCW) - relay/transistor switching from Arduino cw pin

3. speed control - tie to +5V for max speed or interface to Arduino azimuth_speed_voltage pin with cap and resistor per project schematic

4. voltage for azimuth heading - goes into Arduino rotator_analog_az pin

5. ground

6. +5V out (can tie to pin 3 for max speed)

Yaesu G-450XL

Schematic

There is no external control port to directly interface with. Consult the EA4TX guide.

Yaesu G-550