IR Break Beam Sensor - 5mm LEDs - 5 Pairs
Easily detect motion of a passing object with these infra-red beam break sensors from PMD Way.
Each pair includes a transmitter and receiver unit, when an object passes between the two - and its not transparent to infra-red - it breaks the beam and this is reported by the receiver unit.
The receiver is open collector transistor output which means that you do need a pull up resistor if you want to read a digital signal off the signal wire. Most microcontrollers have the ability to turn on a built in pull up resistor.
If you do not, connect a 10K resistor between the white wire of the receiver and the red wire. If you want to control a relay or LED or whatever, it can sink up to 100mA to ground.
Each order of one quantity is for five pairs (a pair being a transmitter and a receiver unit).
- Maximum sensor distance: ~25cm
- Operating voltage: 3.3~5V DC
- Transmitter operating current: 10mA @ 3.3V; 20mA @ 5V
- Receiver LED can sink 100mA
- Transmitter and receiver LED Angle: 10 degrees
- Response time: <2ms
- Dimensions: 20 x 10 x 8mm
- Wire length : 234mm
Download datasheet for more information (pdf).