Description:The LED pin must be adjusted into the cycle of 1 ms
Led seem to be using the PNP transistor to electricity, LED pin must receive a lower voltage.
Commonly used system of air purifier
An infrared light-emitting diode and phototransistor, diagonal decorate allows it to dust in the air, the reflected light is detected
The sensor has a very low current consumption (maximum 20 ma, ma 11 typical), can carry up to 7 VDC sensor. The output is an analog voltage is proportional to the measured by the dust concentration, sensitivity of 0.5 V / 0.1 mg/m3
Attetion:You need to add a 150 ohm resistor and a 220 uf capacitance to use it.
Power supply voltage: 5-7V
Working temperature: - 10-65 degrees Celsius
Dimension: 46 x 30 x 17.6 mm
1x Ultrasonic Distance Measuring Transducer Sensor