Everything went fine until I found that the button is missing!
So I edited the code and let the led blink itself….
https://photos.app.goo.gl/YAbJNKAYSofp4Hav6
Here are the ideas for final project!
The first idea is a smart lock that detects the keys via NFC, and reminds the user if they forgot them. It uses distance sensor to detect the status of the door (open? closed) and requires a speaker that plays the siren.
The second idea is a clock with a background light that changes like the lunar phase. It requires a bunch of LEDs (diffused?) and motors that can control the hands.
The third idea is from a prototype developed in the Affirming Artifacts. It is basically a torchlight controlled by a smartphone. It requires a Processing sketch on the phone and a Bluetooth adaptor that connects to the phone. It also requires batteries, some LEDs and a solid body (3D printing?).
I’ll bring you an extra pushbutton for class tomorrow. There may also be some in the VFL electronics cabinet.
Your final project brainstorm ideas should also be in this post!
Nice brainstorm, Hui!
1. NFC is short range (max 4in/10cm). So for this to work, the user would have to touch their keychain to the device (not a huge deal but thought you should know). For the door, a magnetic reed switch is more appropriate than a distance sensor to detect it being ajar (https://www.adafruit.com/product/375). Here’s a good NFC reader that will work with your Metro board: https://www.adafruit.com/product/789 Here’s a keychain tag: https://www.adafruit.com/product/363 You could use this sound board to play whatever recorded audio you like: https://www.adafruit.com/product/2210 (2MB version, if your sound is very long, get the 16MB version) or you could use a simple piezo buzzer: https://www.adafruit.com/product/160 (check and see if you have one in your kit)
2. I’m not sure this sketch/idea is fleshed out enough for me to provide too much suggestion. Arduino boards by themselves don’t keep time very accurately, so a realtime clock module is required: https://www.adafruit.com/product/3296 They make addressable LED strip that is only white, too: https://www.adafruit.com/?q=dotstar%20white
3. For a simple bluetooth controlled setup, try something like this: https://www.adafruit.com/product/3406 (works with the Adafruit Bluefruit LE Connect app for android/iOS), nothing needs to plug into the phone if it has bluetooth already. You can power feathers with a limply battery, and recharge it via the micro usb port. https://www.adafruit.com/category/574 and here are some honking-bright LEDs: https://www.adafruit.com/?q=3w