tuning-knob-pcboard

https://github.com/bmo/tuning-knob-pcboard

This is a KiCAD PC Board design for a tuning knob that works with PowerSDR and SmartSDR and Remote Ham Radio (RHR). Uses STM32 hardware. Find the software that works with this here: https://github.com/bmo/hwcontrol

Features:

• 24ppr encoder
• multiple ways to build it
• uses mostly-available STM32F103 "Blue Pill" PC boards, may also work with newer, more powerful, more available, and cheaper (!?) "Black Pill" PCBs using STM32F4xx CPUs (with code changes)
• through-hole parts
• 20-30 minute assembly
• traces already supplied for future expansion for footswitch inputs, flash memory, SPI-based displays
• works with RHR, PowerSDR, SmartSDR when used in conjunction with https://github.com/bmo/hwcontrol

Version 1:

Build it two ways:

• snap-action tactile switches and 3mm LEDs
• small tactile switches with built-in LEDs
• isolated pin 40 to not prohibit "Black Pill" from being plugged in

Version 2 (in Progress):

• Cherry MX or compatible "buttons"
• RGB LEDs for illumination

Future:

• With a composite USB Device providing two CDC (serial) devices, a solution that provides a Knob and a de-bounced footswitch

References:

• KiCAD library / design for Cherry Switch + RGB : https://github.com/sszczep/Cherry-MX-Breakout-Board

Contributions

Thanks to @cjtheham for BOM and documentation!