Arduino Flame Sensor Interface - Theorycircuit Arduino Flame sensor Hookup Analog (A0) Output . Digital (D0) Output. Connect as per the hookup diagram give power supply from the power source of Arduino board. connect output pin of flame sensor to the Arduino GPIO pin, and upload the following code as per your wish. Arduino Code for Flame Sensor Flame Sensor Digital (D0) Output IR Sensor Circuit and Working with Applications OverviewOperationCategoriesApplicationsAnalysisCharacteristicsComponentsAn infrared sensor is an electronic device, that emits in order to sense some aspects of the surroundings. An IR sensor can measure the heat of an object as well as detects the motione types of sensors measures only infrared radiation, rather than emitting it that is called as a passive IR sensor. Usually in the infrared spectrum, all the objects radiate some form of thermal radiations. These types of radiations are invisible to our eSee more on elprocus Flame Detector Circuit - Best Microcontroller Projects Many existing burner controls utilize a combustion safeguard circuit which combines the output of a flame rod sensor and system interlocks, as indicative of fuel and air supplies, fan operation, etc., to open or enable the fuel valve. A flame rod sensor typically generates a low microampere DC current in the presence of a flame.