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https://github.com/simonprickett/pi-arcade-button-led

Demo using an Adafruit Arcade button with built in LED as both an input and output with Python for Raspberry Pi.
https://github.com/simonprickett/pi-arcade-button-led

adafruit arcade-button iot led piezo-buzzer python raspberry-pi raspberrypi

Last synced: about 1 month ago
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Demo using an Adafruit Arcade button with built in LED as both an input and output with Python for Raspberry Pi.

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# Raspberry Pi Arcade Button LED / Buzzer Demos



This repository contains some example code for building a Raspberry Pi project using an Adafruit LED Arcade button, a Raspberry Pi and optionally a buzzer.



## Shopping List



I used the following:



* [Adafruit Mini LED Arcade Button - 24mm Translucent Blue](https://www.adafruit.com/product/3432) (note the red and green versions of these won't work with the Pi as they need 5v, other colors are ok).

* Raspberry Pi 3 (but any model should do, I just had a 3 on hand).

* Piezo style buzzer, [got mine from Amazon](https://www.amazon.com/gp/product/B0727RGJLY/).

* Food container, the sort that you get fresh soup in.



## LED Button Counter Demo



The first demo I build uses the arcade button and its built in LED.  Whenever the button is pressed, a global variable is incremented and the LED flashes that many times.  The code for this is in `pi_arcade_button_led.py`.  This demo doesn't use the buzzer.



Click to watch a video demonstration and code walkthrough:



[![Video Thumbnail](https://img.youtube.com/vi/olSWVYz0dvE/0.jpg)](https://www.youtube.com/watch?v=olSWVYz0dvE)



## LED Button Counter Demo with Buzzer



This demo is exactly the same as the above, but the buzzer also sounds every time the LED turns on.  Code is in `pi_arcade_button_led_buzzer.py`.



## LED Button / Buzzer Game



This demo works a bit differently.  Again, every time the button is pressed, the LED will flash and a global counter is incremented.  This time, after a random number of button presses (1-5 in the demo), the buzzer will sound.



Imagine this as a game where the person that triggers the buzzer loses or has to do a forfeit, or maybe it's like a pass the parcel game where the person that triggers the buzzer is a winner!



After the buzzer has been triggered, a new random number is chosen and the game immediately restarts.



The code for this example is in `pi_arcade_button_led_buzzer_game.py`.



Click to watch a video demonstration and code walkthrough:



[![Video Thumbnail](https://img.youtube.com/vi/oazOvfxgGPw/0.jpg)](https://www.youtube.com/watch?v=oazOvfxgGPw)



## Running as a Service



As the Pi is stuck in a food container, and I can't access the ports etc, I can't login at the console.  I don't really want to have to SSH into the Pi to start the Python code either, so I made it start at boot by creating a systemd service file for it.



This file is `arcade_button_led.service`.  You can change which of the example code files it runs by altering the line:



```

ExecStart=/usr/bin/python pi_arcade_button_led.py

```



You may also need to update this line depending on where you cloned this repo to on your Pi:



```

WorkingDirectory=/home/pi/pi-arcade-button-led

```



I wrote a blog post on how to set up a systemd service on the Pi, the blog uses a Node.js application as an example but the same steps apply to setting up this Python code.  If you'd like to learn about how to do that, you can [read about it here](https://simonprickett.dev/writing-a-systemd-service-in-node-js-pi/).