1. On-board TLC5615 chip, TLC5615 is a digital-to-analog converter with serial interface. Its output is voltage type. The maximum output voltage is the reference voltage value. It has a function and the power is reset. DAC is good, only to serial input of 10-bit data through 3 serial buses.
2, the onboard TL431 voltage reference chip, can also be connected to the external voltage
3, all the pins of the chip have been taken out by the single-chip microcomputer
4, working voltage: 5V