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 →The Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor is a dust sensor designed for climate logging, weather nodes, and room monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Particle Range of measurement: 0.3 ~ 1.0μm; 1.0 ~ 2.5μm; 2.5 ~ 10μm; Particle Resolution: 1ug / m³.
| Product | Sensor style | Standout |
|---|---|---|
| Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor | dust sensor | Current item |
| Air Quality Sensor Breakout VOC and eCO2 CCS811 | gas sensor with I2C | I2C interface, gas detection |
| Adafruit SGP40 Air Quality Sensor Breakout - VOC Index - STEMMA QT / Qwiic | gas sensor with I2C | STEMMA QT connector, Qwiic connector |
| Adafruit BME680 - Temperature, Humidity, Pressure and Gas Sensor - STEMMA QT | environmental sensor with I2C | STEMMA QT connector, Qwiic connector |
This sensor is a good fit for weather stations, room monitors, greenhouses, incubators, and climate data loggers.
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Useful add-ons include fresh-air test setup, an enclosure with vents, and a display for local readout, depending on how you plan to power, mount, and log the sensor.
| Product | Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor |
|---|---|
| Minimum distinguishable particle diameter | 0.3 micrometer |
| Particle Range of measurement | 0.3 ~ 1.0μm; 1.0 ~ 2.5μm; 2.5 ~ 10μm |
| Particle Counting Efficiency | 50%@0.3μm 98%@>=0.5μm |
| Particle Effective Range (PM2.5 standard) | 0 ~ 500μg/m |
| Particle Maximum Range (PM2.5 standard)* | >0 ~ 2000ug / m³ |
| Particle Resolution | 1ug / m³ |
| Particle Maximum Consistency Error (PM2.5 standard data)* | ±10%@100~500μg/m³ ±10μg/m³@0~100μg/m³ |
| Particle Standard Volume | 0.1 L |
Check the pin labels on the Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor and match them to your controller voltage, ground, and signal pins. Keep wiring short and verify the logic level before powering the module. Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
1 × Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor
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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.
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 →Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →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 →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 →Share what you built. Photos, BOM, what worked, what didn't.
view thread →Symptom + what you tried + clear photo = answers within hours.
view thread →Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →