sensor จับเส้น linetracker สำหรับทำหุ่นเดินตามเส้น

Specifications

• Dimensions: 2.95" x 0.5" x 0.125" (without header pins installed)
• Operating voltage: 3.3-5.0 V
• Supply current: 100 mA
• Output format: 8 analog voltages
• Output voltage range: 0 V to supplied voltage
• Optimal sensing distance: 0.125" (3 mm)
• Maximum recommended sensing distance: 0.25" (6 mm)
• Weight without header pins: 0.11 oz (3.09 g)

Interfacing with the QTR-8A Outputs

There are several ways you can interface with the QTR-8A outputs:

• Use a microcontroller’s analog-to-digital converter (ADC) to measure the voltages.
• Use a comparator with an adjustable threshold to convert each analog voltage into a digital (i.e. black/white) signal that can be read by the digital I/O line of a microcontroller.
• Connect each output directly to a digital I/O line of a microcontroller and rely upon its internal comparator.

This last method will work if you are able to get high reflectance from your white surface as depicted in the left image, but will probably fail if you have a lower-reflectance signal profile like the one on the right.

https://www.pololu.com/product/960

https://www.pololu.com/docs/0J19/all