Fine dust meter

https://youtu.be/oCuQAjjnsaM

necessary

-PMS7003 with extension calbe or connecter
-arduino pro mini or nano
-servo SG90 * 2






If you open the Arduino code file, you can see the code below


///////////////////////////////setting area///////////////////////////////////////

int modes=1;


//////////modes 1////////////
＃define p10_a_min 170
＃define p25_a_min 170




//////////modes 2////////////
＃define p10_a_max 24
＃define p25_a_max 24



//////////modes 3////////////
＃define p10_a_exc 19
＃define p25_a_exc 19





＃define steps 40
//The larger the step value, the slower the rotation speed.

＃define p10_svp 3
＃define p25_svp 5
//Pin to which servo motor is connected

///////////////////////////////setting area end///////////////////////////////////////



The initial value of the modes variable is 1.

The meaning of the numbers.

1: indicates 0 on the scale
2: Indicates the maximum value of the scale.
3: Indicates the exce