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### proton-c compatible crkbd pcb
-![pcb](images/pcb.jpg)
### info
-#### required changes:
-* Moving the TRRS data line to the TX pin (A9).
-* Moving the LED data line to a pin with a general purpose timer or similar (ADC3-12/B0).
-* Pull-up resistors between VCC and Serial Data (~4.7k).
-#### other changes:
-* Added AST1109MLTRQ speaker footprints.
-* Added two EC-11 rotary encoder positions.
-* Added Pimoroni Trackball support. Footprint reference: [MangoIV](https://github.com/MangoIV).
+#### changes:
+* usart full duplex communication (t**rr**s cable required!)
+* move led data to pin with general purpose timer (ADC3-12/B0)
+* add piezo buzzer (AST1109MLTRQ)
+* add two rotary encoder positions
+* add pimoroni trackball support (footprint thanks to [MangoIV](https://github.com/MangoIV))
+(latest-commit pcbs are currently untested)
#### parts
-Item | Count
+item | count
------------ | -------------
-[1N4148 Diodes (SOD-123)](https://lcsc.com/product-detail/Switching-Diode_LGE-1N4148W_C402213.html) | 42
-[SK6812 Mini-E LEDs](https://www.aliexpress.com/item/4000475685852.html) | 42
-[WS2812B LEDs](https://www.aliexpress.com/item/32732686773.html) | 12
-[Kailh MX Sockets](https://www.aliexpress.com/item/4000019410050.html) | 42
-[Proton-C](https://qmk.fm/proton-c/) or [Bonsai-C](https://github.com/customMK/Bonsai-C) | 2
-[EC11 Rotary Encoders](https://www.digikey.com/en/products/detail/bourns-inc/PEC11R-4025F-S0024/4699199) | 2
-[PJ320A TRRS Jack](https://www.aliexpress.com/item/4000661212458.html) | 2
-[Reset Switch](https://www.aliexpress.com/item/1255399892.html) | 2
-[4.7k Pullup Resistors](https://www.aliexpress.com/item/32979849787.html) (4K7 one) | 2
-[AST1109MLTRQ Speakers](https://www.aliexpress.com/item/32558833519.html) | 2
-[128x32 OLED Display](https://www.aliexpress.com/item/32794209149.html) | 2
-[MCU/OLED Sockets](https://www.aliexpress.com/item/32847384633.html) | 2 (40 pos. each, 48 needed)
-[OLED Socket Pins](https://www.aliexpress.com/item/32855402975.html) | 1 (40 pos. each, 8 needed)
-[MCU Millmax pins](https://www.digikey.com/en/products/detail/mill-max-manufacturing-corp/3320-0-00-15-00-00-03-0/4147392) </br> Alternatively, diode/resistor legs can be used | 48
-Pimoroni Trackball [UK](https://shop.pimoroni.com/products/trackball-breakout) [EU](https://splitkb.com/collections/keyboard-parts/products/trackball-breakout) [NA](https://www.digikey.com/en/products/detail/pimoroni-ltd/PIM447/10246389) | 1
+[1N4148 diodes (SOD-123)](https://www.aliexpress.com/item/3256802197190733) | 42
+[SK6812 mini-e leds](https://www.aliexpress.com/item/4000475685852.html) | 42
+[WS2812B leds](https://www.aliexpress.com/item/32732686773.html) | 12
+[kailh mx sockets](https://www.aliexpress.com/item/4000019410050.html) | 42
+[proton-c](https://qmk.fm/proton-c/) or [bonsai-c](https://github.com/customMK/Bonsai-C) | 2
+[EC11 rotary encoders](https://www.aliexpress.com/item/2251832789732148) | 2
+[PJ320A trrs jack](https://www.aliexpress.com/item/4000661212458.html) | 2
+[reset switch](https://www.aliexpress.com/item/1255399892.html) | 2
+[AST1109MLTRQ speakers](https://www.aliexpress.com/item/32558833519.html) | 2
+[128x32 oled display](https://www.aliexpress.com/item/32794209149.html) | 2
+[mcu/oled sockets](https://www.aliexpress.com/item/32847384633.html) | 2 (40 pos. each, 56 needed)
+[oled socket pins](https://www.aliexpress.com/item/32855402975.html) | 1 (40 pos. each, 8 needed)
+[mcu millmax pins](https://www.digikey.com/en/products/detail/mill-max-manufacturing-corp/3320-0-00-15-00-00-03-0/4147392) </br> alternatively, diode/resistor legs can be used | 48
+pimoroni trackball [UK](https://shop.pimoroni.com/products/trackball-breakout) [EU](https://splitkb.com/collections/keyboard-parts/products/trackball-breakout) [NA](https://www.digikey.com/en/products/detail/pimoroni-ltd/PIM447/10246389) | 1