Fine dust meter

thingiverse

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 excess area of the scale. 0: All settings are completed and the machine starts. Please follow the below for setup STEP 1 When the servo motor has finished rotating with modes 1, set the needle to 0 and assemble. STEP 2 Change modes to 2 and upload. The needle should point to the maximum (110, 60). If it is misaligned, correct the angles p10_a_max and p25_a_max and upload again. STEP 3 Change modes to 3 and upload. The needle should point to the excess area. If it is misaligned, correct the angles p10_a_exc and p25_a_exc and upload again. STEP 4 Change modes to 0 and upload. The needle rotates according to the level of fine dust. The setup is over.