User Manual

109
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
Gas Sensor Module T-Cobbler PCF8591 Module
DO GPIO17 *
AO * AIN0
VCC 5V0 VCC
GND GND GND
Raspberry Pi T-Cobbler Active Buzzer Module
GPIO1 GPIO18 SIG
5V 3V3 VCC
GND GND GND