$89.00 AUD

1 in stock


G-5500 K3NG Rotator Controller

Skill level required:  Intermediate – Advanced    Not suitable for beginners

Familiarity with Arduino IDE, Teensyduino & programming MCUs via USB
Familiarity with Nextion programming via microSD card or USB/FTDI
Soldering connectors/wire
Mounting Nextion and board in your own enclosure

Sorry, I cannot offer personal assistance to teach you how to use Arduino/Teensy/Nextion
You are expected to look after this yourself.


This K3NG based computer interface controller suits a Yaesu G-5500 type dual Az/El rotator controller for operators who want a practical and powerful interface, along with the ability to access spare MCU I/O ports for future experimentation.

Pre-assembled and tested (factory MCU removed after testing) and ready for you to complete the integration into your own system requirements.


• Yaesu G-5500 compatible for CW/CCW/Up/Down control

• PCB 100 x 50mm

• Accommodates Teensy 3.2 MCU (not supplied)

• Nextion (not supplied) touchscreen interface (free Nextion firmware by VK4GHZ)

• Generic azimuth only rotator control compatible

• Az and El analogue potentiometer inputs

• Piezo audible alert output

• Teensy Real Time Clock battery connection

• 4 x N.O. generic push-button switch inputs with pull-ups  ie; as remote CW/CCW/Up/Down control lines

• GPS serial data pass-through (genuine FTDI chip) to USB Mini-B for time-syncing PC

• High efficiency DC-DC Buck 7805 Regulator

• Powered from G-5500 Controller

• Accommodates MT8870 DTMF decoder module (not supplied) for remote DTMF control applications




What’s in the box?

1 x assembled and tested controller board

1 x 8-pin DIN connector (to G-5500)

1 x 4-pin min DIN connector (to GPS)

2 x Polarised  2-pin connectors (to audible alert piezo, RTC battery backup)



What you supply

• Teensy 3.2 MCU (K3NG rotator controller firmware available from Github)

• Nextion HMI of your choice (free firmware for 3.5″ or 5.0″ by VK4GHZ)

• An enclosure to suit your own requirements

• Interconnection wire to suit your own requirements

• GPS Module (serial 9600Bd NMEA)


VK4GHZ K3NG G-5500 Controller Kit Documentation

VK4GHZ G-5500 K3NG Rotator Controller Kit Notes



VK4GHZ K3NG G-5500 Controller Schematic

Available for your own records upon purchase.



rotator_pins_VK4GHZ_G5500.h file

Pre-configured rotator_pins.h file to suit this board.

Rename this to rotator_pins.h





K3NG Arduino Firmware




Will this work with a G-5400?

Will VK4GHZ K3NG Controller Boards Work With Other Rotators?


VK4GHZ Nextion firmware for K3NG Rotator Controller available from:

VK4GHZ Nextion for K3NG Rotator Controller


Additional information

Weight 124 g
Dimensions 160 × 105 × 80 mm