Ultra-Slim Round Fingerprint Sensor and 6-pin Cable

Add biometric security to your project with this ultra-slim optical fingerprint sensor from Adafruit. The compact round design with built-in blue LED ring makes it perfect for panel mounting in enclosures, safes, and access control systems.

The onboard DSP handles all image processing, feature extraction, and matching. Communicate via TTL serial from any microcontroller. Store up to 80 fingerprints in the built-in flash memory.

Key Features

• Ultra-Slim Design – Compact round sensor for panel mounting
• Blue LED Ring – Illuminates when waiting for finger touch
• Onboard DSP – Handles all image processing and matching
• 80 Fingerprint Storage – Built-in flash memory for enrolled prints
• TTL Serial Interface – Easy connection to any microcontroller
• Library Support – Arduino and CircuitPython libraries available

Specifications

• Sensor Diameter – 20.8mm
• Cable Length – ~100mm
• Interface – TTL Serial UART
• Baud Rate – 115200 (not the standard 57600)
• Operating Voltage – 3.3V
• Connector – 6-pin Molex-style, 1mm pitch

Wiring

• Black – GND
• Yellow – Microcontroller TX (data out)
• Green – Microcontroller RX (data in)
• Red – 3.3V VIN
• White – IRQ (optional)
• Blue – 3.3V VCC (optional)

Ideal For

• DIY safes and lock boxes
• Access control systems
• Attendance tracking
• Secure enclosure projects