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.
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DTMF (Dual Tone Multi-Frequency) is a telecommunications signaling method that uses a combination of two sinusoidal frequencies to generate a dial tone.
The MT8870 module is a DTMF receiver that decodes the key pressed on a telephone keypad using a band-split filter. A band-split filter, as the name implies, splits the consolidated frequencies to identify them. The MT8870 module then converts the DTMF signal into 4-bit digital representing all 16 possible combinations on a standard telephone keypad.
Specifications:
- Operating Voltage: 5V
- Interface type: Digital
- On-board MT8870 frequency decoder chip
- On-board audio input interface
- On-board LED lights for output state indication
- PCB Size: 26.5 x 24.5 mm
Library: None
Inclusions:
- DTMF decoder module x1
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