Seeed Studio XIAO RA4M1 Dev Board, Compatible with Arduino IDE, Based on Renesas RA4M1 (Chip Used in UNO R4 Minima), 5V Tolerant, CAN Bus, USB-C, Ultra-Compact (Pre-Soldered)

All XIAO are great little boards. But this one is special if you are interested in analog signals. It has a 12 bit DAC. The R4 is a super Arduino, but overall not a super processor. But at this price, it's a dream.

I've had one Seeed Xiao RA4M1 brick itself after normal light usage. Completely unusable.

Don't let its small size fool you – this XIAO RP2040 board is a powerhouse. It's incredibly responsive and offers a surprising amount of functionality, including a 12-bit DAC, making it ideal for projects involving analog signals. The Arduino IDE compatibility makes it beginner-friendly, while its powerful capabilities cater to more advanced users as well. It's a fantastic little board for a wide range of applications.

These tiny Arduino ready boards are fantastic to play with and learn how to write code with. Enough GPIO ports for almost anything you'd need, and have a fast response. Plugged and play with the IDE, took one small download for me into the IDE and ran right away.