Process

First, the fabric pressure sensors would have to be attached to the backpack using conductive thread. After this, all of the electrical components can be placed inside the backpack itself, including the battery, the Arduino, etc. that would be involved in making the vibration motors vibrate in response to the pressure on the pressure sensors. The pressure sensors change their resistance based on how much pressure is being sensed. This resistance would have to be tested based on the backpack wearer’s good posture as well as bad posture in order to wire the circuit correctly to respond in the right manner.

I also thought about where would be the best place to put the vibration motors so that the wearer could feel the vibrations but also not feel uncomfortable wearing the backpack. Since the backpack probably holds items, and the person wearing it feels the weight of the backpack, I thought it would be a bad idea to put the vibration motors under the straps. It is also possible to simply use LEDs instead to notify the wearer that they currently have bad posture, but I feel this would be less effective than feeling a sudden vibration.

I think it would be possible to place the vibration sensors inside the backpack straps, if there was enough padding around them to prevent them from being damaged from the weight.