SunFounder Raspberry Pi 3,2 Module B And 1 Module B+ Gpio Expansion Extension Board Plus Shield With Ds1307 And Pcf8591 Chip  (Multicolor)

Sunfounder Raspberry Pi 3,2 Module B and 1 Module B+ GPIO Expansion Extension Board Plus Shield with DS1307 and PCF8591 Chip Compatible with Raspberry Pi 3, 2 Module B and 1 Module B+|Extended 40 pins of the Raspberry Pi, separate arrangement, marked with BCM pin number, wiring help.|Integrated the RTC chip DS1307, able to get accurate time.|Integrated AD - DA chip PCF8591, contains 4-channel 8-bit analog input and 1-channel 8-bit analog output.|Detailed manual is available. Introduction: Plus Shield leads out 40 pins of Raspberry Pi 2 Module B and Raspberry Pi 1 Module B+ with pin printing. It integrates the AD-DA chip and RTC chip. The I2C communication protocol is used. No pins are occupied. The AD - DA chip is PCF8591 with 8-bit 4-channel analog output, and 1-channel 8-bit analog input. The RTC chip is DS1307, which uses 56 - byte, battery-backed, nonvolatile (NV) RAM for data storage. For more information, you can visit https://www.sunfounder.com/wiki/index.php?title=Plus_Shield Application: Extended 40 pins of the Raspberry Pi List: 1* Plus Shield Module 6 * M2.5*11 single-head copper standoff 6 x M2.5 nuts 6 x M2.5*6 screw