10PCS IR Infrared Sensor Module Slotted Optical Optocoupler Speed Measuring Sensor Module Photo Interrupter Sensor Motor Speed Detection Robot for Arduino
$9.99
Adopting a slot type photoelectric sensor, it consists of an infrared light-emitting diode and an NPN photoelectric transistor, with a slot width of 5.9mm.
As long as a non-transparent object passes through the slot, it can trigger to output a low TTL level.
Using Schmidt trigger to jitter pulses is very stable and can be used for small car speed measurement, distance measurement, and other applications!
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10PCS IR Infrared Sensor Module Slotted Optical Optocoupler Speed Measuring Sensor Module Photo Interrupter Sensor Motor Speed Detection Robot for Arduino
$9.99