I embroidered this tote bag using alpaca yarn, my favourite fibre.
In this project the canvas bag lights sewed at the front of the canvas bag indicate the weight being carried inside the bag. There is a scale of lights depending on the weight placed inside. The first light turns on to indicate there is something in the bag, the second light will turn on when more weight is added, and the third light indicates the maximum weight has been reached.
Sensor was made with two layers of aluminum foil separated by a layer of velostat. I glued aluminum foil to velostat in the four corners on each side and covered this with a sleeve made of non-conductive fabric. Sensor’s input goes through pin A2 and output to LED lights goes through pins A1, A3 and A7.
The sensor is placed at the bottom of the canvas bag, so when some weight is placed on the bag and a person lifts it, LED lights will go on depending on the weight of the bag.
Parts and Materials List
- Adafruit Circuit Playground Express
- Sewable LED lights
- Li-Ion Poly 1200mAh battery
- Aluminum foil
- Non-conductive fabric
- Alligator-clip jumper wires
- Conductive thread
- Non-conductive thread
- Canvas bag embroidered with Alpaca yarn
- Glue gun
See code here.