Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Measure Position, Angle, or Motion with Reliable Sensor Data
The Velocity Measurement 2-Channel Kit is an airflow sensor with uart designed for position feedback, angle sensing, speed measurement, and motion control. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Output Voltage: TTL; Max Output Frequency: 100Khz.
Important: Motion sensors often need calibration in software to get the best accuracy. Mounting angle and vibration can change the result.
Why you’ll love it
- Power range: TTL
- Controller output: 100Khz
- Sensor size: 24mm
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: position feedback, angle sensing, speed measurement, and motion control
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Velocity Measurement 2-Channel Kit | airflow sensor with UART | Current item |
| Potentiometer Circular Soft Ribbon Sensor | position angle displacement speed acceleration sensor module | pressure sensing |
| Rotary Angle Sensor CJMCU 103 | rotation sensor | temperature sensing |
| Rotation Sensor Rotary Encoder Analog | rotation sensor with analog output | analog output |
What you can build
This sensor is a good fit for shaft encoders, speed counters, linear feedback, smart knobs, and actuator control.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include USB-to-serial tools, level-safe controllers, displays, and data loggers, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Velocity Measurement 2-Channel Kit |
|---|---|
| Output Voltage | TTL |
| Max Output Frequency | 100Khz |
| Working Voltage | 4.5~5.5 VDC |
| Emitter Voltage Drop | 1.5V |
| Circular Grid Board Diameter | 24mm |
| Circular Grid Board Inner Diameter | 4mm |
| Category | position angle displacement speed acceleration sensors |
Wiring & usage notes
Connect power and ground, then wire TX and RX to a serial-capable controller at the correct logic level and baud rate. Motion sensors often need calibration in software to get the best accuracy. Mounting angle and vibration can change the result.
What’s in the box
1 × Velocity Measurement 2-Channel Kit
Frequently Asked Questions
What does the Velocity Measurement 2-Channel Kit measure?
It is designed to measure liquid or air flow.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this UART sensor?
This version uses UART or serial output, so you connect power plus TX and RX at the correct logic level.
Does it need calibration?
Usually yes. Motion sensors often benefit from software calibration to improve offset, drift, and orientation accuracy.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →