In stock

Tobi-Duo is an expansion board for any Overo COM. It provides dual 10/100baseT Ethernet connectivity.

IMPORTANT: This version of the Tobi-Duo 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 Tobi-Duo with a Panasonic connector, contact us.

Tobi-Duo Ethernet

An expansion board to embed inside a security or firewall appliance. You may also want to include Janus in your cart so you have a USB console port access to the Overo COM.

If you are looking for dual Ethernet connectivity but want another COM or processor, you may use Geppetto online to design and customize a board for your own project.

This board is used to embed inside a security or firewall appliance. Engineers and companies have used this board to prototype dual Ethernet connectivity on their projects.

Included Components
Tobi duo (board)

Tobi duo

Board-To-Board Connector

2 x 70-pin AVX connectors


10/100 Base-T Ethernet


25 mm W


116 mm L


3.5V - 5V

Product Family



Built with components rated 0< T <70C

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.

Texas Instruments TPS62111 Step-Down Converter

A low-noise synchronous step-down DC-DC converter. Component Max Vin: 17V, 1.5A.

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.