Introduction: Make Your Own Bluetooth Gps Navigator Bracelet
This project consist of a bluetooth bracelet connected to the user's smartphone, who indicate when to turn or do a maneuver.
The main aventages of this project instead of a traditionnal gps or a smartphone are:
- It drains less battery on the smartphone.
- It doesn't required earbuds or headset (who can be dangerous on bicycle or motorcycle).
- It doesn't required special mounts.
- It vibrate when you need to do something.
It's made of several leds and a cellphone vibrator.
The bracelet indicate the road to take with some combinaisons of blinking light and vibrations. For exemple, when the user should take the left road, the left LED will blink and the motor will vibrate at the same time.
When the user should take the 3rd exit of the roundabout, all LEDS will blink 3 times and the motor will vibrate 3 times also.
It recalculate the route if the user take the wrong road and calculate the best route for the selected locomotion.
It's based on the google direction API, it will be replaced with a opensource alternative in the future (mapquest, skobbler or even Mapzen.
It's not perfect,I don't have a incredible skill in programming, but I want share my work instead of let it rotting on my HDD.
This project is made with some opensources technology and the help of tutorials on the internet (which include instructables ;) ), so I let it opensource for everyone.
Have fun ! :D
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Step 1: Parts
This is the list of components you will need for this project.
- 5 LED (3mm)
- 1 3.7v 20c 240mah battery
- 1 HC-06 blutooth transmitter
- 1 ATTINY 84
- 1 Arduino Uno
- 1 Capacitors (10µF/25V)
- Some jumpers
- 1 opaque plastic piece
- 1 Lithium Battery Charge Controller
- 1 cellphone vibrating motor
- A band
- A case (optionnal)
- 1 slide switch
The case can be downloaded here :
(Solidwork and stl file)
Step 2: Program You ATTINY84
There is a nice tutorial to install the ATTINY84 library here :
Then select the ATTINY84 and burn the 1Mhz bootloader.
Wire like on the picture:
After that, send this .ino file into the ATTINY.
Step 3: Breadboard Time !
Set everything up like on the picture.
You can add resistor for each LED if you want to.
There is also the frizting file here:
Step 4: Test Everything
Power up the circuit and connect the bluetooth module to your smartphone.
Type 1234 for the pin number and install the following app :
Bluetooth MAC Adress
Get the MAC adress of the bluetooth module
Then test the circuit with this app :
The source code of the cordova project is in the rar archive
Step 5: Generate Your Google Map Key
First of all, go on your Google API Console
Then create a project and go to credentials.
Generate a new api key.
Step 6: Install the Application
There is the apk and rar which contain the source code
Step 7: Change Preferences
Go in the preference menu (press this icon on the top right corner)
Then put your key and the bluetooth mac adress in those fields
Step 8: Conclusion
Thank you reading this instructable :)
This project have taken a lot of time, so I would like that everyone respect what I made.
I know I made a lot of mistakes, so don't hesitate to remade your own version, comment what's wrong in the comment section or you can go on the github.
I would like to thanks some people for them incredible great work :D.
-Don Coleman (who made the bluetooth serial plugin for Cordova)
I will make a github for this project and I think I will maintain the project.
The bracelet can be use for other things.
A pebble smartwatch version will come out.
Respect the opensource community, if you republish it, I would like to be credited.
Thank you for respect those principle.
Github link : here
My youtube channel : here
My email address : nicolas[dot]mahieu[dot]isf[at]gmail.com
Participated in the
Design Now: 3D Design Contest 2016
Participated in the
Arduino Contest 2016
Participated in the
First Time Authors Contest 2016