2x 2538 SMD LED for the key switch. How do I make this workout?

• ch32v003

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  CH32V003 is an ultra-cheap RISC-V MCU with 2KB SRAM, 16KB flash, and up to 18 GPIOs that sells for under $0.10

Higher interest in the mechanical issue. Kailh box aren't made for 5050-equivalent-sized LEDs so the best I can come up with is placing them on a daughter board with some distance and just accepting losing some light. Probably will use a low-cost microcontroller and R2R leader (current sink) to make them addressable. Alternatively, make use of the 11 bit PWM and LC filter while the ADC forms the feedback loop. Currently unsure if I go with WCH CH32V003 (https://github.com/openwch/ch32v003) or Padauk MCUs. A couple of kHZ PWM should be fine but if I make a PCB I might as well just go all in with PWM-free.

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