KE4021 Keyes DIY Electronic Brick Knock Sensor

KE4021 Keyes DIY Electronic Brick Knock Sensor

1. Introduction
The Keyes 2021 New DIY Electronic Brick Knock Sensor is a high-quality module capable of effectively detecting knocks and vibrations. Manufactured from eco-friendly materials, this module is suitable for various smart projects and DIY designs, and is widely used in sound detection, alert systems, and interactive devices.

2. Features
- Eco-friendly Material: The module uses black eco-friendly materials that comply with modern safety standards.
- Vibration Detection: Capable of sensing object knocks and vibrations, triggering signal output.
- Anti-Reverse Interface: Equipped with a 2.54mm red anti-reverse connector to ensure safe connections.
- Wide Compatibility: The module is compatible with various microcontrollers (Arduino, Raspberry Pi, etc.), facilitating integration into diverse project designs.
- Easy Installation: The 3-pin white anti-reverse cable design simplifies wiring, making it suitable for beginners.
- Flexible Application: Can be used to develop knock triggers and other interactive projects.

3. Specifications
| Parameter | Description |
|-----------------|--------------------------------------|
| Model | KE4021 |
| Sensor Type | Knock Sensor |
| Cable Length | 200mm |
| Operating Voltage | DC 5V |
| Interface Type | 2.54mm pitch anti-reverse interface |
| Power Consumption | Approx. 20mA (when operating at 5V) |

4. Working Principle
The knock sensor operates by monitoring vibrations. The specific principles are as follows:
- Power Connection: The module connects to a power supply via GND and VCC, supporting DC 5V operation.
- Signal Output: When a vibration or knock is detected, the output signal changes to notify the controller.

5. Pin Description
| Pin Name | Description |
|----------|-----------------------------------------------------------------------------|
| VCC | Positive power supply connection, supports DC 5V input |
| GND | Negative power supply connection |
| S | Signal output pin; outputs a high-level signal when a knock/vibration is detected |