My Trainning

My first project with KiCad...

Here is my schema

Here is my Arduino shield for my gas sensor

And a part of importante code

/* on Arduino Uno */
#define OFF 0
#define ON 1
#define T_REGENERATION_MS 2500 // 2.5 sec for regeneration delay
...
    // somewhere in the state machine
    if ( isRgazSensorSaturated() ) {
        // if the gas sensor saturated do
        setRregeneration(ON);
        delay(T_REGENERATION_MS) // wait for the necessary time, see https://www.arduino.cc/reference/en/#functions
        setRregeneration(OFF);
    }
...

MIT license