http://www.waveshare.net
https://www.waveshare.com
https://www.waveshare.net/shop/High-Precision-AD-HAT.htm 我是块Raspberry Pi扩展板，具备10通道32位高精度ADC和24位辅助ADC。 Raspberry Pi GPIO接口没有AD功能，如果你要用到高精度的ADC，那我将是不错的选择！
https://www.waveshare.com/18983.htm I am a Raspberry Pi expansion board with an 10-channel 32-bit high-precision ADC and a 24-bit auxiliary ADC. The Raspberry Pi GPIO interface does not have AD functionality. If you want to use high precision AD, then I will be a good choice!
