I was thinking when we use a flashlight nowadays. But I couldn’t think anything else to use without very special occasions. (Instead, a lot of people prefer to use their mobile LED flashlight.) So I want to make a flashlight for only emergency situations, (e.g out of battery of smartphone) but it could be carried all the time because it is very lightweight and portable, so I can put this flashlight in my wallet.
That’s some keywords : portable, lightweight, DIY or disposable …
So I think whenever I roll up this flashlight card, the led turns on.
Materials that I am going to use…
- Coin battery
- Copper tape
- white Led
- paper or PET
So, I started to make a flashlight card with 3.5x2inch size.
It works like that,
But definitely, there are some problems.
- It is difficult to roll-up and hold the cylindrical shape. ( looking for different shapes for turning on.)
- The copper tape and led had a bad connection.
- Paper is too weak for turning on several times.
I thought different shapes of the flashlight cards…
So I started to make again! And I decided to make a kind of the box shape (like above 1st and 2nd pictures) because it can be folded and opened easily.
So I tried to illustrate how it would be like and measure the dimension to be card size.
I also used same materials that I used before for previous prototyping. But I want to turn on the LED light when it just slides up right to left. And it was created based on the ideas of how pop-up card work. (But I have to push the center of the card a little bit… because the pop-up card structure is not good. )
Folding & Unfolding
I can put my flash light in my wallet! I am so happy! 😀