https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL12225_%E2%80%93_Photo_Interrupter_Sensor%2FenWSAL12225 – Photo Interrupter Sensor/en - Versionsgeschichte2026-10-23T22:11:24ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL12225_%E2%80%93_Photo_Interrupter_Sensor/en&diff=1308&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:27:14Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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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 />
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== Summary ==<br />
The Photo Interrupter Sensor is a light-interruption sensor used for speed measurement, e.g., in smart cars. It uses a WYC-H206 slot photoelectric sensor with an infrared emitter and receiver plus a Schmitt trigger for stable signals.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL12225 WSAL12225 – Photo Interrupter Sensor, Speed Measuring]<br />
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== Technical overview ==<br />
* Principle: An infrared transmitter and receiver form a slot; when the beam is interrupted, the receiver output goes low through an inverting Schmitt trigger.<br />
* Power supply: 3.3 V to 5 V (VCC).<br />
* Dimensions: 26.8 mm × 15 mm × 18.7 mm; mounting hole diameter 3 mm; gap width 6 mm.<br />
* Pinout: DOUT = digital data output, GND = power ground, VCC = 3.3–5 V supply.<br />
* Pico connection: VCC to 3.3 V, GND to GND, DOUT to GP22.<br />
* STM32 connection (example on STM32F103RB): VCC to 3.3 V, GND to GND, DOUT to PA4.<br />
* Arduino UNO connection: VCC to 5 V, GND to GND, DOUT to D2.<br />
* Expected behavior: When blocked by an object, the signal LED turns on and the serial port prints “ON”; otherwise the LED stays off and the serial port prints “OFF”.<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/f6/Photo_Interrupter_Sensor_Demo.7z<br />
7z x Photo_Interrupter_Sensor_Demo.7z -o./Photo_Interrupter_Sensor_Demo<br />
cd ~/Photo_Interrupter_Sensor_Demo<br />
cd 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 />
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== Notes and version constraints ==<br />
* The provided sample demos are tied to specific boards (e.g., STM32F103RB, Arduino UNO); other boards may require modified connections and possibly custom porting.<br />
* Firmware versions can affect script behavior; using the supplied MicroPython firmware is recommended.<br />
* Speed-measurement accuracy depends on slot geometry (6 mm gap) and sampling rate; no further measurement values are given in the source text.<br />
* No information on certifications, warranty or safety notes is present – clarify separately before product integration.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Photo_Interrupter_Sensor Photo Interrupter Sensor - Waveshare Wiki]<br />
* Source revision: 70301<br />
* Captured: 2026-08-30T03:21:34+00:00<br />
* SHA-256: <code>a194b2c00700ac45496133d86b2c51f6ca34a53f39a9096ab5140e7a2fc428f0</code></div>JWTechPublisher