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QRE1113 Line Sensor Breakout - Analog
此版本的QRE1113為數位輸出，用電容放電電路來測量反射量。這個循線原件對於循線非常好用而且可以支援3.3V和5V。
QRE1113 紅外線反射感測器分為兩部分-一個紅外線LED和一個紅外線感測光電晶體。當你提供電力給它時感測器內的紅外線LED就會發亮。100Ω的電阻會限制LED的電流。光電晶體的輸出是和10nF電容在一起。電容放電越快就越多反射到表面。
這個感測器廣泛用於循線機器人上。白色的表面比黑色的表面反射更多的光，所以當面對白色的表面時電容放電比面對黑色表面時快。
功能：
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原文 官方版：
Description:
This version of the QRE1113 breakout board features an easy-to-use analog output, which will vary depending on the amount of IR light reflected back to the sensor. This tiny board is perfect for line sensing applications and can be used in both 3.3V and 5V systems.
The board's QRE1113 IR reflectance sensor is comprised of two parts - an IR emitting LED and an IR sensitive phototransistor. When you apply power to the VCC and GND pins the IR LED inside the sensor will illuminate. A 100Ω resistor is on-board and placed in series with the LED to limit current. A 10kΩ resistor pulls the output pin high, but when the light from the LED is reflected back onto the phototransistor the output will begin to go lower. The more IR light sensed by the phototransistor, the lower the output voltage of the breakout board.
These sensors are widely used in line following robots - white surfaces reflect much more light than black, so, when directed towards a white surface, the voltage output will be lower than that on a black surface.
The power input and analog output pins are brought out to a 3-pin, 0.1" pitch header. The board also has a single mounting hole if you want to screw the board onto something.
We also have a digital version of this board.
Dimensions: 0.30 x 0.55 " (7.62 x 13.97 mm)
Features:
- 5VDC operating voltage
- 25mA supply current
- Optimal sensing distance: 0.125" (3mm)
Documents:
