This project was made using the Popular Science Super Bundle, our most powerful bundle.
Make an honest ETA device that lets your housemate [parent, significant other, roommate] know when you are on the way home and likely to arrive.
This cloud-connected progress meter tracks your proximity to home by reading your location from your smartphone and displaying it on a bargraph module in your house. If arriving home first, you can text your housemate with the press of a button to let him/her know that you got home first.
*Note: This project works as a circuit setup, so you can make it with just Bits! If you like, you can follow further instructions for adding extra features and constructing the “housing”.
How it works:
This project uses a GPS enabled smartphone, and a few IFTTT recipes, the cloudBit, and a bargraph to visually display information about your proximity to home. The IFTTT recipes are set up using the location channel. This channel triggers when you enter or exit a location radius that you set. Because there are 5 LEDs on the bargraph, we set up 5 radii, each with recipes related to entry and exit so you can track someone as they come and go. When you leave the office, your smartphone will notify the cloudBit as you get closer to home and start lighting up the LEDs on the bargraph. The closer to home you are, the more LEDs will be lit up.
With a threshold, MP3 player and speaker, you can add an audio cue that lets your roommate know when you’ve left the building. The threshold is set to trigger when the bargraph moves to the 2nd LED.
Make it home first? With the addition of a button and an IFTTT SMS recipe, you can have the cloudBit send a text to your roommate to let him/her know you made it home first and that you'll start dinner.
Build it out! Turn this circuit into an interactive wall piece that both displays your progress and holds your wallet. With a small hinged platform that sits directly on top of the button, the act of placing your wallet inside the case will automatically press the button, sending a text message. You can also add some acrylic edge lighting to the bargraph for nice visual effect.