What It Does
The design uses an Arduino Pro Micro as a USB keyboard interface. A straight key or iambic paddle is connected via 3.5mm TRS jack, and key presses are sent as keyboard characters over USB.
Build Your Own OTG Morse Paddle Converter
This page summarizes the public guide at Uppitydowney/morsekeyboard so you can build a USB OTG Morse paddle converter for Android devices.
Main Parts
- 1x Arduino Pro Micro
- 1x 3.5mm TRS jack: Tensility 54-00081
- 4x M2 x 8 screws (for case assembly)
- 1x USB-C cable for PC/Android/iOS connection
Connection Notes
- 3.5mm TRS connects your key/paddle to the converter.
- TRS mapping noted in the source: tip to pin 2, ring to pin 3.
- Use a USB-C to USB-C cable when connecting directly to a phone.
- Firmware key outputs can be changed in code to match your app workflow.
Build Resources
- Full source and firmware: github.com/Uppitydowney/morsekeyboard
- 3D printable enclosure files: printables.com model page
- This page URL: samuel.com.tr/paddle-info
Note: Hardware and firmware details are maintained by the original project. Please verify pinouts and wiring before powering your board.