User Manual

74
The schematic diagram:
Experimental Procedures
Step 1: Build the circuit
Raspberry Pi T-Cobbler PCF8591 Module
SDA SDA1 SDA
SCL SCL1 SCL
3V3 3V3 VCC
GND GND GND
LM393 T-Cobbler PCF8591 Module
DO GPIO17 *
AO * AIN0
VCC 3V3 VCC
GND GND GND
Rain Detection Board LM393
- IN
- GND
Note:
The two pins on the rain detection board are exactly the same. You can connect them to
pin IN and GND on LM393.