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 Infrared Sensor Adjustable E18-D80NK is an infrared proximity sensor with digital output designed for presence sensing, short-range detection, and touchless automation. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Adjustable detection range: 3cm - 80cm; Power Supply: 5V; Output Operation: Normally Open.
| Product | Sensor style | Standout |
|---|---|---|
| Infrared Sensor Adjustable E18-D80NK | infrared proximity sensor with digital output | Current item |
| Distance Sensor 10-80cm GP2Y0A21YK0F Sharp | infrared distance sensor with digital output | adjustable sensing range, infrared sensing |
| Infrared Tiny Adjustable 3 - 100cm Sensor Switch | button or switch input module | adjustable sensing range, infrared sensing |
| IR Proximity Obstacle Avoidance Sensor Module | infrared proximity sensor with digital output | adjustable sensing range, digital output |
This sensor is a good fit for touchless dispensers, object counters, door triggers, small robots, and presence alarms.
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Useful add-ons include a microcontroller board, jumper wires, and pull-up or pull-down support when needed, depending on how you plan to power, mount, and log the sensor.
| Product | Infrared Sensor Adjustable E18-D80NK |
|---|---|
| Model | E18-D80NK |
| Output Operation | Normally Open |
| Output DC | Three Wired System (NPN) |
| Adjustable detection range | 3cm - 80cm |
| Power Supply | 5V |
| Working Current | 100mA |
| Diameter | 18mm |
| Length | 45mm |
Connect power and ground, then wire the output pin to a digital GPIO input. Check whether the module uses active-high or active-low logic in your code. Infrared and optical readings change with target color, surface finish, distance, and strong ambient light. Test with your real target before final mounting.
1 × Infrared Sensor Adjustable E18-D80NK
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One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
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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.
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