Yeah, I'd agree that any microprocessors with an onboard ADC would be legal. As far as I know, all Arduino's have a built in ADC. External ones may be better but I guess they're all out. According to this, Raspberry PIs don't have ADCs so this rule clarification makes them illegal too (unless you can do this without an ADC).Yes, with the spesifcations, the Uno is legal.With these clarifications, would an Arduino Uno still work? I'm better with the microcontroller software/circuit construction than the microcontroller hardware.
Teaching the Raspberry Pi how to read analog inputs is easier than you think! The Pi does not include a hardware analog-to-digital converter, but an external ADC (such as the MCP3008) can be used, along with some SPI code in Python to read external analog devices.
https://learn.adafruit.com/reading-a-an ... i?view=all
But according to the rules, RPIs are allowable:
Devices must be built using a microcontroller or microcontroller board (e.g., TI Innovator, Raspberry Pi, Arduino), a display, LED lights, and a participant-built sensor/probe.
In the end, the biggest problem with the clarification is that what it states and implies conflicts with the stated rules.