Clean low-noise 16-electrode analog switching board. No onboard MCU, AD5940, power regulation, USB, or battery. Target PCB: JLCPCB 4-layer, 100 × 80 mm.Clean low-noise 16-electrode analog switching board. No onboard MCU, AD5940, power regulation, USB, or battery. Target PCB: JLCPCB 4-layer, 100 × 80 mm.