This sensor module has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of LEDs are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options.

• Output format for the QTR-8A: 8 analog voltages ranging from 0 V to supplied voltage • Output format for the QTR-8RC: 8 digital I/O-compatible signals that can be read as a timed high pulse • Optimal sensing distance: 0.125" (3 mm)

The Pololu QTR-8A and QTR-8RC reflectance sensor arrays are intended as line sensors, but they can be used as a general-purpose proximity or reflectance sensors. Each module is a convenient carrier for eight IR emitter and receiver (phototransistor) pairs evenly spaced at intervals of 0.375" (9.525 mm).

2019年3月18日 · I’ll show you how to program a QTR sensor array, let’s get started. As far as parts go, assuming you’ve already built the robot we just need the following items. As always, there is a video you can watch if you’re more into that sort of thing. This video covers attaching the sensor and testing the line array.

8rc陣列循線感測器擁有8個紅外線led/光電晶體，非常適合用於循線機器人身上。 成對的LED串聯減少電流消耗，MOSFET允許LED為增加敏感度或節省電力被關掉的選項。

2023年6月28日 · The QTR-8A reflectance sensor array is intended as a line sensor, but it can be used as a general-purpose proximity or reflectance sensor. The array module is a convenient carrier for eight IR emitter and receiver (phototransistor) pairs …

The Pololu QTR-8RC Reflectance Sensor Array has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of LEDs are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options.

Both the QTR-8A and QTR-8RC have the same physical characteristics. Each array measures 2.95" long by 0.50" wide and has a maximum thickness of approximately 0.125". Without header pins, the unit weighs 0.11 oz (3.1 g). The individual reflectance sensors are distributed evenly on the board at 0.375" intervals.

2019年3月6日 · Pololu QTR-8RC vs QTR-8A Sensor Array. Pololu offered, until recently two different eight sensor arrays, the QTR-8RC and the QTR-8A. The RC array uses an RC circuit and capacitor decay time to determine a reflectance amount whereas the A array uses a voltage divider to determine a reflectance amount.

Learn how to use the QTR 8A with detailed documentation, including pinouts, usage guides, and example projects. Perfect for students, hobbyists, and developers integrating the QTR 8A into their circuits.