3-dollar digi mode interface
About the 3-dollar digi mode interface PCB
3-dollar digi mode interface is an open source PCB design by radiohyperactivity, published on GitHub under the GPL-3.0 license. It is a board, with 10 components from 8 distinct parts.
By type, the board carries 3 connectors, 2 capacitors, 2 resistors and 1 transistor.
From the project
Building the $3 DIGI-MODE Interface
This is the companion repository the the YouTube video showing the build of the $3 digi-mode radio interface.
- PDF: schematic.pdf - KiCAD: schematic.kicad_sch
- PDF: kantronisc-connection-diagram.pdf - draw.io: kantronisc-connection-diagram.drawio
- PDF: ptt-buffer.pdf - draw.io: ptt-buffer.drawio
These are the parts I used for my build; pretty much everything except the CM108 USB sound card is an optional extra.
3-dollar digi mode interface bill of materials (BOM)
10 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2N2222 | Q1 | |
| 1 | Headphone | J1 | |
| 1 | Micropone | J2 | |
| 1 | GPIO3 | J3 | |
| 2 | 10kΩ | RV1, RV2 | |
| 2 | 10μF | C1, C2 | |
| 1 | 1kΩ | R1 | |
| 1 | 10kΩ | R2 |
3-dollar digi mode interface design files
The KiCad project lives in the radiohyperactivity/3-dollar-digi-mode-interface repository on GitHub; these links point at the commit this page was built from.
- Schematicschematic.kicad_sch
3-dollar digi mode interface: common questions
How many components are on the 3-dollar digi mode interface?
10 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the 3-dollar digi mode interface design files?
From the radiohyperactivity/3-dollar-digi-mode-interface repository on GitHub, which has the schematic; the links under Design files point to each one.
Can I use the 3-dollar digi mode interface design in my own project?
Yes, under the terms of its GPL-3.0 license, which radiohyperactivity chose for the repository.