TXb 2hp (Powered I2C Bus) pcb & black anodized aluminium panel

£15.99 (exc VAT)


The TELEXb (TXb) is a 2HP powered bus board for the Monome Teletype that also enables the connection of external devices using the two 3.5mm stereo jacks at the top and the bottom of the module. These jacks can be used for connection to the 16n FaderBank, TXb that are in disconnected rack rows, or to fiendishly wonderful Frankenstein machines of your own creation.

This version of TXb comes with an anodized black aluminium panel.

In stock


There are some key things to keep in mind with the TXb (and i2c busses in general):

  •  Powered bus boards are required when you connect three or more devices to your Teletype via i2c.
  • You should only have one bus board connected to power at a time.
  • Connections should be kept as short as possible using high-quality cabling (less than 3.5mm).
  • There still are practical limits to having a stable i2c bus that are highly dependent on the topology of your deployment. Plan for some trial and error.


  • +12V: 1 mA
  • -12V: 0 mA
  • +5V: 0 mA
  • 2HP
  • 20.5mm Depth

Visit the TXb on Modular Grid

The TXb is based off of monome’s “tt-busboard” open source project. You can find it on GitHub.

A user’s guide to i2c

Additional information

Weight 20 g
Dimensions 128.5 × 10 × 4 mm

Synthesiser parts/components

You may also like…