In stock

Thumbo is a USB-powered, DIP-style breakout board for any Overo COM without wireless communications.

IMPORTANT: This version of the Thumbo 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 Thumbo with a Panasonic connector, contact us.


A USB-powered, DIP-style breakout board for connection to any Overo COM without on-board wireless communications. It also features a sixty (60) header at 1.8V logic. This board is for engineers and makers looking to prototype and experiment with the Overo COM.

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

Included Components
Thumbo board

Thumbo board

Board-To-Board Connector

2 x 70-pin AVX connectors


23 mm W


76.2 mm L


5V from USB standard A plug powers this expansion board and the connected Overo COM<

Product Family



Built with components rated -20< T <70C

Power via USB


Key Components
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.