Dobrica Pavlinušić's random unstructured stuff
DSM501A: Revision 7
DMS501A - 2mm pin pitch, DMS501B - 2.54 mm
5V, 90mA
1 minute stabilization after power up
sum time of low (0.7v) for measurement interval, divide by time
PINOUT I/O DESCRIPTION
| Pin number | Pin name | Description |
| #1 | Control | Vout 1 control |
| #2 | Vout 2 | Vout 2 output factory calibrated PWM output for density of particles over 1 �m. |
| #3 | Vcc | Positive power supply DC 5V |
| #4 | Vout 1 | Vout 1 output (PWM) |
| #5 | GND | Ground |
control pin 1
resistor between pin 1 and ground (square pin on board) to control vout 1 output (pin 4)
| Resistor value | Description |
| open | Preset sensitivity (over 2.5 �m) |
| 47K | Half sensitivity (over 1.75 �m) |
| 18.2K | Equal sensitivity of Vout 2 (over 1 �m) |
arduino
Nice library, but inside repository
https://github.com/richardhmm/DIYRepo/tree/master/arduino/libraries/DSM501
