More Than You Ever Wanted to Know About Electrical Engineering, Part 13: Capacitance
Resistors are pretty easy to understand - you burn energy going through something that impedes the flow of charge through it. (If you’re talking about enough current, the burning may even be literal!) Now we’re going to start to look at circuit elements that can store energy, rather than just dissipating it. We’ll start with capacitors.
It’s really easy to make a capacitor. In fact, they’re so easy to make that you frequently make one by accident when building a circuit. (This can cause all kinds of headaches, depending on what you’re trying to do.) The only thing you need is two conductive surfaces separated by an insulating material (i.e. a dielectric material). That dielectric can be wire jacketing, or a special insulator, or even just air.
So. If you put this thing in a circuit, what happens?
Phew got the air conditioner fixed after a night in hell. Turns out something had gone wrong with the capacitator *shrug*
On the plus side of last night, got almost 3k words done of the next chapter in Of Iron.
Haha! May not seem like much but that’s a crazy amount for me, and it isn’t even finished yet! Guess that’s what happens when there’s suddenly 12 other dwarves, a hobbit, and a wizard. But it makes me happy to know I did that.
Really, though. It’s so nice not living in Mordor. Ahhh.
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A minha url abrange duas questões, o meu fascínio por anjos, e a minha paixão pelas palavras. E por que não unir ambos? foi exatamente isso que fiz. Além de que, acredito que Deus nos capacitou com a sabedoria, para que através de palavras se pudesse descrever certos sentimentos imensuráveis, tão divinos quanto anjos.
Brooke Francesi is very interested in process and decided to explore textiles from a different angle in her work–Responsive Textiles. This is her description of the project:
Humans are inherently drawn to objects and materials that satisfy multiple sensory triggers. I collaborated with He Zhang to question the dialogue between analog and digital to create connections between tactile interaction and proximity visualization.
Brooke was interested in creating two specific interactions–one piece was strictly tactile, laser cut mat board triangles glued to the back of organza. The other piece appeared tactile, but within the lasercut Plexiglas triangles were LEDs which would illuminate when someone approached. The magic was an Arduino using the Capacitive Sensing program with conductive thread, but it did take some tweaks along the way.
The most difficult part about this project was tuning the cap sensor code to different environments. We showed it at about 3-4 different events and each time it would take forever to get the proximity intervals correct in the code. The first time we had to make adjustments, I was wearing a vest with some metal on it which meant that the LEDs were lighting up when I was about 3 feet away! It took a second to realize what was going on.
I really like these geometric textiles and the way they move through the hands. It was a nice touch to make them appear as inverses of each other, as well. Brooke said that people reacted with surprise with the LED piece and it became an opportunity for them to learn through the interaction.
Ideas like to build on each other and Brooke felt the project definitely resulted in something larger with future potential.
There are definitely possibilities, such as creating messaging (or lighting) on garments that appear as someone gets close to you. One of my favorite things as an artist and designer is creating situations that encourage people to interact with other people who they wouldn’t normally interact with, or encouraging interactions that wouldn’t typically occur in that particular situation.
Such an interesting project, and just a reminder that part of the magic is using conductive thread. So, maybe you should pick up a bobbin while you’re here. You can sew by hand or use it in the bobbin of your sewing machine. Think of the cool quilts you can make.