Introduction: LED HDPE Plastic Handbag
I've been saving the 1L HDPE bottles for a while now, mainly because once you cut off the top and the bottom, you will end up with a nice, straight piece of relatively thick plastic that can be easily shaped and welded into all sorts different things. And so I decided to make another handbag for those who liked myfirst one, but don't have a sewing machine. Here goes ;)
- 5 x 1L HDPE瓶子
- Slide switch
- Arduino Pro mini
- TP4056 18650 battery charger
- 18650 battery - salvaged from an old laptop battery
- double sided tape
- Wires - damaged Ethernet cable
- 2 x Snap fasteners
- small push switch
- craft knife
- soldering iron (I tend to use a separate one for welding plastics)
- needle & thread
Next I printed out the template and moved onto the fun part.
Step 3: Bending
Before welding the handbag together, I proceeded to bend the pieces along the scored lines. Most of these were inward bends apart from the very top of the front and back pieces where the handles would later be attached to and the top of the inner wall. For these I bent them inwards first and then outwards.
For this step I started by uploading the code to the Arduino and attached the header pins, so that the code could be easily re-uploaded later.
Next I soldered the two wires for the push button onto the pin 2 and ground pin and three wires for the LEDs onto the pin 6, VCC and GRD pin.
To make sure everything works as intended, I attached the wires onto the LEDs and the battery and shorted the push button wires. To make the soldering onto the battery easier and avoid applying too much heat I gently filed both ends of the battery with a nail file.
Since everything worked as desired, I removed the wires from the LEDs and the battery and stitched the charger and Arduino to the inner wall.
Step 5: Welding
To begin the welding process, I slid the cover over the header and aligned it with the inner wall, then I poked a lot of holes through the two plastic layers with the tip of the soldering iron to create a strong joint. Then I attached the hood for the Arduino headers.
When it comes to creating shapes from plastic sheets, you can pretty much treat it as a paper craft project except you would use heat to create a bond instead of glue.
Step 6: Inner Wall
To keep the wires organized and out of the way, I cut the inner wall tabs wherever necessary into smaller strips and used those as wire fasteners.
Next I shortened and soldered on the battery wires and made a small battery cover.
Upon turning on the LEDs I found the electronics to be a little distracting and so I decided to cover the inner wall with a piece of white plastic sheet salvaged from an old monitor, stuck onto the inside of the inner wall with some double sided tape. This could be easily substituted with any white sheet. Once that's done I secured the top of the inner wall onto the top of the front piece from the outside.
For the closing mechanism I decided to go with the sew on snap fasteners. I cut two small holes on the back side of the bag for the bulging parts of the fasteners to sit in and welded on the handles to the front and back of the bag. Next I sewed on the fasteners and welded on the bottom piece of the bag.
Step 10: Final Thoughts
I love how the handbag turned out. I manged to get 22 hours of continues illumination on a 5 hour charge, but this will hugely depend on the battery itself. This bag could be used especially if you like to stand out in a crowd or as a safety measure on those walks home at night. It could also be used as a night light since it gives enough light to let you see where you're walking but it's not blinding. Also the cost of making the bag is very low since most of the items necessary could be salvaged from the recycle bin and broken electronics.
Runner Up in the
Make it Glow Contest