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Stagecoach is an expansion board that harness the power of up to seven Overo COMs networked on a single board.

IMPORTANT: This version of the Stagecoach Board is deprecated because it mates only with Overo COMs using the discontinued AVX connectors, manufactured before January 2020.

Overo COMs manufactured since January 2020 use Panasonic connectors. If interested in a version of the Stagecoach with a Panasonic connector, contact us.

Stagecoach Ethernet

A cluster computer board for up to 7 Overo COMs networked via 100Mbps switched Fast Ethernet communications. Also features 7 USB OTG ports and USB console. The fully populated board draws less than 20W. Power supply included. This is for engineers and companies looking at creating tiny supercomputers. The Stagecoach brings out 7 USB OTG ports and 1 serial-over-USB console port in addition to Ethernet connectivity.

Once you have tested the board, you may use Geppetto online to design and customize a board like Stagecoach for your own project.

You may also want to include Janus to have USB console port access to the Overo COM.

Included Components
Stagecoach (board)

Stagecoach (board)

50 pk Retaining spacers 48 / 48 (white)

Pack of 50 x 48 / 48 mils CONH0020 retaining spacers (1.5mm inter-board spacing, 1.65mm hole diameter). Suitable for configuration of Gumstix DuoVero COM or Overo COM and expansion board of thickness 48 mils or less, which includes Gumstix expansion boards.

5V, 3.5A Power Adapter

5V power adapter at 3.5A for use in North America.

Board-To-Board Connector

2 x 70-pin AVX connectors


10/100 Base-T Ethernet


70 mm


293 mm

Product Family



Built with components rated 0< T < 70C

USB Console Port


USB Device




Key Components
Microchip (SMSC) LAN9221 Ethernet Controller

A full-featured embedded LAN controller emphasizing performance, flexibility, ease of integration and system cost control while providing high performance and throughput.

Micrel KS8999 10/100 9 Port Ethernet Switch

Ethernet Switch with PHY and Frame Buffer used to connect multiple processors through a single expansion board.


Connect to an RS232 serial terminal over USB with the FTDI FT232RQ interface

Mating Connectors
70-Pin AVX Connectors (Female – Overo Expansion)

Connect an Overo COM to an expansion board with these 70-pin AVX connectors.


Please read the instructions in the README file carefully before starting. Instructions and functions are explained in the file.

Files that are needed (such as bootloader and operating system) to create a bootable disk image, are available below.

Our Support page links additional resources.

Software Version:

COVID-19 has affected our supply chain. Please expect delays on your orders while we do everything we can to fulfil them.