Keyestudio KS4028 Manual page 334

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Make combinations of these blocks:
Micro:bit Analog Gas
Expansion （MQ-2）
Board Sensor
GND
5V
Micro:bit
Expansion
Board
G GND
V 5V
Yellow Micro:bit
LED Expansion
Module Board
G GND
V 5V
1602
LCD
Module
GND
5V
334