○ Massduino MD-3248P with 32KB Flash , 2KB SRAM

○ Fully Arduino IDE development

○ Full arduino UNO resource support

○ Rich additional resource

              3 user programmable LEDs

              3 tack switch buttons

              4 CH pwm DAC (2 ch fast mode and 2 ch high resolution mode)

              5 CH HV ADC (Max input 32V)

              Onboard 4.096V and 2.048V voltage reference source

○ Virtual USB , make the board as a HID device (Keyboard / Mice etc.)

○ DC input voltage : DC 9 to 24V

○ System voltage : 3.3V or 5V

○ PWM DAC Range : 0 ~ 4.096V

○ PWM Resolution (CH 1/2): 16bit

○ PWM Resolution ( CH 3/4): 10bit

○ HV ADC input range: 0~32V

○ HV ADC resolution: 1mV w/s 15bit ADC (analogRead_15bits())

Recommend link:https://www.ebay.com/itm/UNO-Pro-Compatible-DAQ-16bit-ADC-UNO-R3-DAC-Onboard-4-096V-REFERENCE-Source-VUSB/223115047614?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649