Note
Hello, welcome to the SunFounder Raspberry Pi & Arduino & ESP32 Enthusiasts Community on Facebook! Dive deeper into Raspberry Pi, Arduino, and ESP32 with fellow enthusiasts.
Why Join?
Expert Support: Solve post-sale issues and technical challenges with help from our community and team.
Learn & Share: Exchange tips and tutorials to enhance your skills.
Exclusive Previews: Get early access to new product announcements and sneak peeks.
Special Discounts: Enjoy exclusive discounts on our newest products.
Festive Promotions and Giveaways: Take part in giveaways and holiday promotions.
👉 Ready to explore and create with us? Click [here] and join today!
2.3 Service Bell
For this project we used a microswitch and an active buzzer to create a service bell. Tap the switch and the buzzer makes a sound.
Micro Switch is also a 3-pin device, the sequence of the 3 pins are C (common pin), NO (normally open) and NC (normally closed).
When the micro switch is not pressed, 1 (C) and 3 (NC) are connected together, when pressed 1 (C) and 2 (NO) are connected together.
Wiring
By default, pins 1 and 3 of the Micro Switch are connected together and GP14 is low. When the Micro Switch is pressed, GP14 is high.
GP15 outputs high to make the buzzer sound.
Code
Note
You can refer to the image below to write code by dragging and dropping.
Import
2.3_service_bell.png
from the path ofeuler-kit\piper
. For detailed tutorials, please refer to Import the Code.
After connecting Pico, click the Start button and the code starts to run. Tap the switch and the buzzer makes a sound.
Note
This project code is exactly the same as the previous project 2.2 Button.