- Arduino Uno (or etc arduino-compatible)
- MQ9 Sensor
- Active Buzzer
- 7-segment 4-digit display with two-74HC595D-chip (In diagram shows a model with a single 74HC595D chip. You will need to use a different display driver to work with it)
- Arduino Uno (or etc arduino-compatible)
- MQ9 Sensor
- Active Buzzer
- 7-segment 4-digit display with two-74HC595D-chip (In diagram shows a model with a single 74HC595D chip. You will need to use a different display driver to work with it)