My project is updated at PROJECT LOGS (These are the modifications and improvements of the project)
My project has been shared on http://arduino.vn/result/1621-vong-deo-tay-ho-tro-nguoi-mu (An arduino community site in Vietnam).
With some knowledge of arduino, anyone can do this.
The bracelet has 3 operating modes:
- Battery charging mode: Enabled when plugging the 5 volt charger into the DC Jack. When the battery reaches 4.2 volts, the charging mode will be turned off.
- Finger vibration mode: When the distance to the object is less than 1 meter, the motor on the thumb will vibrate slightly to alert. When the distance to objects from 1 meter to 2.5 meters, the motor on the little finger will vibrate slightly to alert.
- Sound mode: the sound will ring faster when approaching the object. The sound will slow down as you move away from the object.
* "Button" is used to turn the device on or off by pressing and holding for 3 seconds. Or to switch between two modes, finger vibration mode or sound mode.
Below is a video showing how to turn on my device and how it works in sound mode.
Below is a video showing the bracelet being charged
The bracelet weighs about 60g. I designed a wearable device on my hands, it was easily worn on my hands and easily removed from my hand. Another advantage is that, the hand can still hold or grasp other objects normally when wearing the device.
Long-lasting motor vibrations can cause finger pain. So I let the motor only have a slight vibration level, enough for the blind to feel the vibration from the finger.
When in finger vibration mode, the blind can get used to the feeling: The motor vibrates on the thumb, ie the object is near. The motor vibrates on the little finger, which is far away (from 1 meter to 2.5 meters). Both motors are not vibrating when the distance is greater than 2.5 meters.