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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The Waveshare Laser Sensor (P/N 9524) is a digital obstacle-detection sensor based on the PT1301 chip. It uses modulated light at 650 nm and reports object presence via a digital output signal.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/9524 9524 – Laser Sensor]<br />
* [https://shop.jw-tech.eu/p/WSAL9524 WSAL9524 – Laser Sensor]<br />
<br />
== Technical overview ==<br />
* Boost chip: PT1301<br />
* Effective detection range: typically 0.01–0.8 m; maximum 1.5 m<br />
* Operating voltage: 2.5 V to 5.0 V<br />
* Dimensions: 53.0 mm × 18.0 mm; mounting holes 2.0 mm<br />
* Principle: A 180 kHz oscillator modulates the laser beam; the receiver accepts only same-frequency reflected light, reducing interference from ambient visible light<br />
* Applications: obstacle detection, pipeline counter, smart robot, obstacle-avoiding car<br />
* MCU wiring: VCC to 2.5–5.0 V supply, GND to ground, DOUT to a digital input of the MCU<br />
* Digital output: returns 0 or 1 rather than an analog value<br />
* Optical wavelength: 650 nm; the receiver detects modulated visible radiation in the 650–950 nm band<br />
* Operating current: approximately 40 mA at 3.3 V<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo apt-get install p7zip-full<br />
cd ~<br />
sudo wget https://files.waveshare.com/upload/f/fd/Laser-Sensor-code.7z<br />
7z x Laser-Sensor-code.7z -o./Laser-Sensor-code<br />
cd ~/Laser-Sensor-code/Pico/c/build<br />
export PICO_SDK_PATH=../../pico-sdk<br />
cmake ..<br />
make -j9<br />
cp main.uf2 /media/pi/RPI-RP2/<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* Do not touch resistors or capacitors on the board while it is powered, to avoid burning out the infrared emitting tube.<br />
* Never point the laser directly at eyes – it can damage vision.<br />
* The STM32 examples are based on STM32F103RBT6 and STM32H743; other boards require custom wiring and code porting.<br />
* The Arduino example targets the Arduino UNO; other boards need modified connections.<br />
* Firmware selection for Pico is version-sensitive: prefer the supplied MicroPython firmware (rp2-pico-20210418-v1.15.uf2), as other firmwares may cause abnormal behavior.<br />
* For Pico C development, the Pico SDK path must be exported correctly; otherwise the build will fail.<br />
* All statements regarding compatibility, current draw, certifications, and warranty come solely from the source and should be confirmed by qualified personnel before release.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Laser_Sensor Laser Sensor - Waveshare Wiki]<br />
* Source revision: 89780<br />
* Captured: 2026-08-29T09:35:16+00:00<br />
* SHA-256: <code>a2d454f645a5630262a9aab4a7cf5445aacfed43ef4cdedf8161a5594f9c977b</code></div>JWTechPublisher