🌍 Raspberry Pi Pico W – SW-420 Vibration Sensor (MicroPython)

This project reads analog vibration levels from an SW-420 sensor using the ADC on Raspberry Pi Pico W.

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⚙️ Hardware Setup

SW-420 Pin	Pico W Pin	Description
VCC	3.3V	Power
GND	GND	Ground
AO	GPIO26 (ADC0)	Analog signal
DO	(optional) GPIO16	Digital signal (threshold output)

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🧠 Working Principle

The SW-420 sensor detects vibrations or knocks using a spring-based mechanism.
The onboard comparator circuit can also generate digital threshold signals.

The analog output (AO) gives continuous vibration intensity, read via ADC0.

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🚀 Run the Code

1. Open Thonny IDE
2. Connect Pico W
3. Save code as main.py
4. Tap or shake the sensor — view analog readings in the shell

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