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These colors have different wavelengths
The sensor provides an analog resistive output based on alcohol concentration
MQ-3 Gas Sensor Module Pin Description:
The ATmega8A IC is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture
12V 40W Ceramic Cartridge Heater TSOP 1738 These colors have different wavelengths12V 40W Ceramic Cartridge Heater The 12V 40W ceramic cartridge heater consists of a cylindrical stainless steel tube and thus provide high corrosion prevention. The heating wire inside the ceramic cartridge heater is wound onto a ceramic core. The number of coils varies depending on the power and provide a great uniform distribution of heat, which considerably increases the long life of the heater as well as prevents the oxidation of the heater wire