Mqpcb Fc22 Placa Base Para Sensor De Gas Mq Itytarg

In the schematic, we have a LM393 op-amp which is a low-power low offset voltage op-amp that can be powered from a +5V supply.

But powering the circuit with 3.3V is not an option because the minimum operating voltage of this MQ-2 sensor is 5V.

The main job of this op-amp is to convert the incoming analog signal to digital signal. Other than that we also have an onboard 10K potentiometer that is used to adjust the sensitivity of the MQ-2 Gas Sensor module or the triggering voltage of the module.Other than that we have two LEDs.

The first one is a power LED and the other one is the trigger LED.

The power LED turns on when power is applied to the board and the trigger LED turns on when a certain set threshold is reached. Finally we have two decoupling capacitors that are used to reduce noise in the board.