SparkFun
SparkFun Line Sensor Breakout - QRE1113 (Analog)
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 th...
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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:
- Schematic
- Eagle Files
- Datasheet (QRE1113GR)
- Bildr Tutorial
- GitHub
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- GND
- GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- phototransistor
- A light-sensitive transistor that changes its electrical output when light hits it. Compared with a modulated IR receiver, a simple phototransistor can be more affected by ambient light, so it may need extra filtering or careful setup.
- VCC
- VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.
Find this product in
Brands
Sensors & Input
QRE1113GR Datasheet
Datasheet · 634.6 KB · Click any page to view full size
Line Sensor Breakout Schematic
Schematic · 27.5 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 691.4 KB · Click any page to view full size
Resources & Downloads
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Source Code
Open-source libraries, firmware & example projects for this product
QRE1113 IR sensor breakout board available from SparkFun Electronics
1671498
about 1 year ago
· 10 commits
- Hardware Removing backup Eagle files over 11 years ago
- Production Files Created Production Files folder almost 13 years ago
- .gitattributes Updating README over 12 years ago
- .gitignore Updating README over 12 years ago
- README.md Update README.md about 1 year ago
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