Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | TTL Level (High/Low) |
| Detection Type | Through-Beam Infrared |
| Response Time | < 10 microseconds |
| Slot Width | 5mm ± 0.5mm |
| LED Wavelength | 940nm Infrared |
| Mounting Style | PCB Screw Terminal / Pin Header |
| Operating Temperature | -20°C to +70°C |
| Compatible Applications | Smart Cars, Motor Encoders, Speed Counters |
| Package Includes | 1x Sensor Module, 1x Mounting Kit |
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect for my Arduino robot car
This sensor works flawlessly with my Arduino Uno. The response time is incredibly fast, allowing for precise speed measurement on my DIY smart car project. Setup was easy with the provided pins.
Anonymous
Mar 22, 2026
Rating: 5/5
Great for tachometer projects
Used this to build a digital tachometer for a small DC motor. The infrared beam cuts cleanly, and the output logic levels are perfect for direct connection to microcontrollers without extra conditioning.
Anonymous
Mar 22, 2026
Rating: 4/5
Good value, stable signal
I used this to build a motor encoder counter. The signal is very stable and doesn't jitter much even at high RPMs. Just make sure your power supply is clean to avoid noise.
Anonymous
Mar 22, 2026
Rating: 5/5
Reliable and compact
The form factor is small enough to fit into tight spaces on my custom chassis. The through-beam design is much more reliable than reflective sensors in varying light conditions.
Anonymous
Mar 14, 2026
Rating: 5/5
Essential component for velocity control
Bought two of these for a differential drive robot. They provide accurate pulse counts which helped me implement a solid PID controller. Highly recommended for students.
Anonymous
Mar 04, 2026
Rating: 4/5
Works as described
No complaints here. It detects the interrupter disk accurately. The only minor issue is that the mounting holes are a bit tight for standard M2 screws, but it works with some patience.
Q: Can this sensor be directly connected to a Raspberry Pi GPIO?
A: Yes, since the output is TTL level and operates at 3.3V-5V, it can be directly connected to Raspberry Pi GPIO pins. Ensure you connect the VCC to the 3.3V or 5V pin depending on your Pi model requirements.
Q: How do I calculate speed using the pulses from this sensor?
A: Count the number of pulses over a fixed time interval. Speed = (Pulse Count / Number of Slots on Disk) / Time Interval. Multiply by the wheel circumference to get linear speed.
Q: What is the maximum RPM this sensor can accurately measure?
A: With a response time of under 10 microseconds, this sensor can handle very high frequencies. For a standard 10-slot encoder disk, it can accurately measure speeds exceeding 10,000 RPM.
Q: Is this sensor suitable for outdoor use?
A: While the operating temperature range is wide, the open optical slot can be affected by direct sunlight or dust. For outdoor use, we recommend adding a simple shield or housing to protect the beam path.
Q: Does this module come with the interrupter disk or just the sensor?
A: The package includes the sensor module and a mounting kit. The interrupter disk (codewheel) is not included and must be sourced separately or 3D printed according to your specific resolution needs.
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