Dum-E is my Iron-Man-inspired robotic arm: 3 axes plus a gripper, 4 servos in total. This week I opened KiCad for the first time and designed the full schematic for its custom control board. The brain is a Seeed XIAO ESP32-S3 running CircuitPython. It talks over I2C to a PCA9685 16-channel driver that runs all the servos. For manual control there are 4 potentiometers and 3 buttons, powered by a dedicated 5-6V supply with a 1000uF cap to smooth out servo current spikes. ERC is now fully clean. Next up: footprints and the PCB layout.