FLAME click mikroBUS™ A Click accessory module for use with MikroElektronika mikroBUS™ microcontroller development boards. The Flame click board is a fire detection solution using a PT334-6B silicon phototransistor. The phototransistor is housed in a dark diffused package and has high sensitivity to infrared radiation. A potentiometer on the click board allows precise setting of the detection threshold, which, when reached, will send an interrupt to the target board MCU through the mikroBUS INT pin. The click board also has an analogue output for continuous infrared level measurement. The board requires a power supply of 3.3 or 5V.