__61334.jpg "MR003-007.1 Analog Reflectance Sensor")
The MR003-007.1 Analog Reflectance Sensor carries an infrared LED and phototransistor pair.
The phototransistor is connected to a pull-up resistor to form a voltage divider that produces an analog voltage output between 0V and +5V as a function of the reflected IR. Lower output voltage is an indication of greater reflection.
The LED current-limiting resistor is set to deliver approximately 20mA. The current requirement can be met by some microcontroller I/O lines, allowing the sensor to be powered up and down through an I/O line to conserve power.
Because of its small size, multiple units can easily be arranged to fit various applications such as line following robots and proximity/edge detection
Characteristics
| Supply voltage | +5V |
| Supply current | 20mA typ |
| Operating temperature | -25°C / +85°C |
| Optimal sensing distance | 1/8” (3mm) |
| Interface | Analog |
| Dimensions | 0.5” x 0.31” (12.7 x 7.9 mm) |
| Weight | 0.01oz (0.3g) |
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