Lemon Wired Microcontroller

Read more on the Lemon Microcontrollers homepage.

I took everything you could possibly want in your wired microcontroller and stuck it on a PCB to make something seriously overpowered:

• An RP2040 microcontroller with 8 MB flash memory
• FPC Connectors to connect Pumpkin Flex PCBs or TheBigSkree's fully flexible PCBs
• A VIK connector for connecting VIK-compatible trackballs and displays (or to use with my VIK breakout)
• Through hole pads for alternatively soldering connections to your keys or accessories
• Onboard RGB LED
• Level shifting to drive LEDs at 5V
• Shift register to drive column pins, giving you 23 total I/Os (of which 7 are output only) for connecting keys and peripherals
• Supports firmware autogen in Cosmos

If you're using the Lemon with a trackball or display that doesn't have a VIK connector, you can use the VIK breakout board I sell to add one right next to the peripheral and a 12p 0.5mm FPC cable to neatly connect to the microcontroller.