board
common types
Through-beam type(对射型)
对射款 - 光电开关微型红光传感器
(pansonic shit-clone == Panasswinc)

Through-beam type(对射型) APPs


simple design of IR reflective

Retro-reflective type(反射板型)
Diffuse reflective type(漫反射型)

U-type Slot-type photoelectric sensor
- common slot dimension 5 mm
working principles
- Infrared (IR) sensor — detects reflected IR light
- Ultrasonic sensor — measures sound wave echoes
- LIDAR sensor — uses laser light to detect distance
- Radar sensor — uses radio waves
fiber optic photoelectric sensor == Diffuse reflective type

alternative names
- Obstacle detection sensor
- Obstacle avoidance sensor
- Proximity sensor
- Distance sensor
- Object detection sensor
- Range sensor
common drive methods


NPN与PNP概念解读
NPN:表示共正电压,输出负电压; PNP:表示共负电压,输出正电压; NPN NO:表示常态下是常开的,检测到物体时黑色线输出一个负电压信号 NPN NC:表示常态下黑色线是输出负电压信号,检测到物体时,断开输出信号 PNP NO:表示常态下时常开的,检测到物体时黑色线输出一个正电压信号 PNP NC:表示常态下黑色线是输出正电压信号,检测到物体时,断开输出信号
DC NPN drive

DC ~24V PNP drive
