Supercapacitor Contest!


What can you do with a lot of supercapacitors? This is no idle question. I picked up a bag of 100 on eBay. These are sweet: Cooper PowerStor Series A carbon aerogel capactitors with ultra-low resistance. Specifications: 2.5 V, 1.5 F, with nominal equivalent series resistance of 60 milliohms at 1 kHz. I recently saw these at Digi-Key for $9.60 each. These aren't the wimpy memory backup caps that aren't rated for enough current to drive an LED. These are power caps, meant for high current charge and discharge.

Obviously, these are meant for great things. It only leaves one question: What great things should I do with them? To help answer that, I'm holding a contest: Come up with the best use for a pile of supercaps, and you'll get ten of them to play with.


Here are the details:
Enter by posting a good idea for a supercapacitor project. Your suggestion doesn't have to use all of the caps, or even most of them-- something that uses only one might be a perfectly good suggestion. Enter as often as you like. You can post your entry as a comment here or E-mail your entry. You have until July 31, 2006, midnight PDT. (If you post anonymously, you might want to leave some contact information as well so that I can contact the winner.)

The winner will be judged by the EMSL staff. Points will be awarded for originality, cleverness and geek appeal. The prize for the best entry is a set of ten supercapacitors, sent by mail. You could possibly interpret the prize value to approach $100! If there are enough good entries, five caps each will be sent to the two runners up.

Here are a few ideas to get you started:

  • Rechargeable LED throwies!
  • Storage element for bike headlight generator.
  • Fast recharge radio control battery for electric model planes, to enable mid-air refueling!
The contest begins... Now!

[Update: Contest has ended. The winners were announced here]

47 comments

The following comments are owned by whomever posted them. This site is not responsible for what they say.
Authored by: christian on Friday, July 14 2006 @ 12:04 PM PDT Supercapacitor Contest!
Use supercapacitors to build a beaded curtain.
Authored by: Anonymous on Friday, July 14 2006 @ 01:22 PM PDT Supercapacitor Contest!
christian: no offense, but if you just want to make a curtain out of capacitors, I'll find you some much more varied (colorful, sizes, ratings, etc) ones to use. Supercaps are "special" in that they are rated to hold an extremely large charge in a relatively compact space. If you tried to get the equivalent size in an electrolytic capacitor, it'd be approx the size of a toaster.

I have always wanted to see if they could be used in a BEAM-style circuit: charge up during the day and discharge slowly during the night. Maybe this is a little roving thing that doesn't depend on sunlight at night. Definitely sign me up for the 10, and thanks in advance.
Authored by: brian on Friday, July 14 2006 @ 01:25 PM PDT Supercapacitor Contest!
Sorry, just getting the hang of your site - the previous BEAM comment/posting was mine. Thought I was logged in. :(
Authored by: Anonymous on Tuesday, August 15 2006 @ 09:44 AM PDT Supercapacitor Contest!
make an EMP gun to destroy unwanted electronics. either old equipment, or that guy who plays his stereo too loud.

or a door knob taser... yeah... that'd be funny.


-Purplejesus
-not affliated with any soul collection agencys

-maybe i outta set up an acct.... lots of cool things here... may the gods bless the Firefox Sumbler..
Authored by: christian on Friday, July 14 2006 @ 12:09 PM PDT Supercapacitor Contest!
Make Christmas tree ornaments out of supercapacitors. You might want to
use them to power an LED or two on the inside of the ornament...
Authored by: Windell on Friday, July 14 2006 @ 12:46 PM PDT Supercapacitor Contest!
Better yet, use the supercapacitor as the ornament-- just tie the leads around a branch.

---
Windell H. Oskay
drwho(at)evilmadscientist.com
http://www.evilmadscientist.com/

Authored by: Anonymous on Friday, July 14 2006 @ 01:31 PM PDT Supercapacitor Contest!
Make a railgun, using one capacitor to drive each coil.
Authored by: Anonymous on Friday, July 14 2006 @ 01:54 PM PDT Supercapacitor Contest!
I second the motion. This guy has the right idea:

http://www.powerlabs.org/emguns.htm
Authored by: Anonymous on Friday, July 14 2006 @ 02:03 PM PDT Supercapacitor Contest!
Yeah, I third this. (thought actualy more like a gauss gun)
Authored by: Anonymous on Friday, September 29 2006 @ 06:14 PM PDT no
coilgun
Authored by: Anonymous on Tuesday, December 30 2008 @ 10:39 AM PST Supercapacitor Contest!
A railgun uses rails. What you're thinking of is a coilgun.
Authored by: nerd256 on Friday, July 14 2006 @ 01:55 PM PDT Supercapacitor Contest!
90 Super capacitors ( presumably you gave away 10 of them ) =
135 F, pretty impressive, but I like the serial configuration better

90*2.5 = 225V at 16.67mF = 421.875 Joules.

So, were you to string them up in series, charge all of them, you'd have quite the "ESD tester". Hook it up to an LED and see what happens. Want to get back at that op-amp thats been giving you trouble? Tired of your peers who are sucking up your bandwidth (disconnect own computer first) ?

Or you could just pop them into a wall outlet and have them explode spectacularly.

Sorry, all my ideas have to do with death and destruction.
Safety / Legality not guarenteed.
Authored by: Anonymous on Friday, July 14 2006 @ 02:00 PM PDT Supercapacitor Contest!
It probably isn't possible, but I have always wondered if someone could figure out how to engineer one of these with a self contained power source, even if it only hovers a short time.

http://jnaudin.free.fr/lifters/main.htm
Authored by: Anonymous on Friday, July 14 2006 @ 03:55 PM PDT Supercapacitor Contest!
Use them in building a Tesla coil.
http://brianb.org/tesla.htm
Authored by: MikeFez on Friday, July 14 2006 @ 04:46 PM PDT Supercapacitor Contest!
I emailed you this but I just figured out how to reply, Wire them all up to the nessacary voltage and place them in your trunk of your car so that if your battery dies you have a quick restart so you can at least get going.

Another one:
Just wire them up for portabal appliances such as a xbox or computer
Authored by: fergbrain on Friday, July 14 2006 @ 05:51 PM PDT Supercapacitor Contest!
Make a coil gun. I made one my senior year in high school using a bunch of capacitors from disposable cameras (we went around to the local stores and they would give us large boxes filled with spent disposable cameras). We ended up using some 300 capacitors (each was around 330 micro Farads) and a set of capacitors from an old defibrillator. We wrapped a bunch of wire around a PVC tube, placed a magnet inside, charged the bank, then fired it. Wow.
Authored by: Anonymous on Wednesday, July 19 2006 @ 09:43 PM PDT Supercapacitor Contest!
Make an electric mine field by using the "capacitor grenade" design at the bottom of this page:

http://rotteneggs.com/r3/show/se/132965.html

(I wonder if that's enough voltage to kill a rat? Put some PB under it and use them as elcro-rat traps!)
Authored by: Matt on Thursday, July 20 2006 @ 01:39 AM PDT Supercapacitor Contest!
Tiny, tandem-rotor helicopters that zoom straight up in the air! With bright LED for nighttime use.
Authored by: Matt on Thursday, July 20 2006 @ 01:47 AM PDT Supercapacitor Contest!
Power an electromagnetic pendulum clock by storing solar energy!
Authored by: Matt on Thursday, July 20 2006 @ 01:51 AM PDT Supercapacitor Contest!
Rechargeable mitten warmers!
Authored by: Matt on Thursday, July 20 2006 @ 01:55 AM PDT Supercapacitor Contest!
Anti-lock power brakes for bicycles!
Authored by: Matt on Thursday, July 20 2006 @ 02:00 AM PDT Supercapacitor Contest!
Screwdriver degausser/remagnetizer!
Authored by: Matt on Thursday, July 20 2006 @ 02:23 AM PDT Supercapacitor Contest!
Pimp your boombox amp!
Authored by: Matt on Thursday, July 20 2006 @ 02:39 AM PDT Supercapacitor Contest!
Make a coil g... no, wait! Make a Big Oscillator :)
Authored by: Anonymous on Sunday, July 23 2006 @ 02:38 AM PDT Supercapacitor Contest!
well just uhh..."presumeing you have played the rts command & conquor 95 trought c&c red alert...make a tesla coil....or just put them up on an old 6v battery and run small appliences off it with a wall socket =p it will juice it =-p
Authored by: peterman921 on Tuesday, July 25 2006 @ 03:21 PM PDT Supercapacitor Contest!
use them for rechargable flashlights using old servos or gear motors.

Authored by: Matt on Wednesday, July 26 2006 @ 10:24 PM PDT Supercapacitor Contest!
Some kind of vibration damper. Hmm...
Authored by: Matt on Sunday, July 30 2006 @ 11:27 PM PDT Supercapacitor Contest!
Inductively-charged bubble-bath mood lights! (um, embedded in crystal clear epoxy or something ;)

yeah, molded into shapes! Cute blue-LED clouds, amber suns, emerald leaves, a school of multicolored fishes / sea life (with Glowing Innards)
Authored by: Matt on Sunday, July 30 2006 @ 11:46 PM PDT adding a thermistor...
...to control multiple color LEDs or blinking, might produce an interesting effect
Authored by: Matt on Tuesday, August 01 2006 @ 02:06 AM PDT Supercapacitor Contest!
One-dimensional CCD for really really bright light!
Authored by: Anonymous on Monday, August 14 2006 @ 10:21 PM PDT Supercapacitor Contest!
Unless I missed it, I didn't see anyone suggest just charging them up...then you just toss one to a "friend" to catch...great party.

Of course, once everyone catches on, you'll have to rig them up as dual-tip darts to get the same effect.

Authored by: Anonymous on Thursday, August 17 2006 @ 08:05 PM PDT Supercapacitor Contest!
Make a glove that stuns people, or a stun gun
Authored by: Anonymous on Wednesday, August 23 2006 @ 12:36 AM PDT Supercapacitor Contest!
These caps can't be used to build a Tesla coil. Caps in a Tesla coil must charge to over 20kV, these caps are only rated for 2.5V Even if you connected all 100 together it wouldnt work. These also can't be used to shock anyone or anything. Charged to 2.5 volts isnt enough to do any damage to anything.

These caps are probable best used like a battery. Maybe in some sort of solar powered device.

I'm sure someone can come up with some good ideas!
http://www.teslamap.com
Authored by: Anonymous on Wednesday, August 23 2006 @ 12:38 AM PDT Supercapacitor Contest!
Let me rephrase... I'm sure someone can come up with some *more* good ideas! ;-)
Authored by: Anonymous on Tuesday, June 30 2009 @ 07:16 PM PDT Supercapacitor Contest!
actually they can be used to power a timer timer circuit to drive a voltage multiplier
Authored by: Anonymous on Wednesday, August 23 2006 @ 09:20 PM PDT Supercapacitor Contest!
Unroll them and use the foil for tree decorations at Christmas
Authored by: Ozyg on Sunday, September 24 2006 @ 11:21 AM PDT Supercapacitor Contest!
Make several electronic grasshoppers. Attach some solar cells (from cheap calculators maybe) and buzzers, to make them recharge at day and chirp at night! Then seal them in epoxy to make them waterproof.
Authored by: Windell on Sunday, September 24 2006 @ 11:45 AM PDT Supercapacitor Contest!
That's an interesting idea. We actually have been making some solar circuits
that are sealed in epoxy (to make them waterproof); do you know of any
waterproof buzzers that could work in a system like that? If we took
regular speakers and dipped them in epoxy, they certainly wouldn't work
any more.

---
Windell H. Oskay
drwho(at)evilmadscientist.com
http://www.evilmadscientist.com/
Authored by: Ozyg on Sunday, September 24 2006 @ 04:20 PM PDT Supercapacitor Contest!
Unfortunately, no. Maybe you could try buzzers (or however they should be called) used in watches? They may work while sealed in epoxy...
Authored by: Anonymous on Monday, June 29 2009 @ 07:13 AM PDT Supercapacitor Contest!
Piezo plates. Whether the vibration is dampened is another matter. You could leave a hole/tube/chamber on the front side and maybe silicone seal. The plate hardly cares for moisture. Actually, they're used in cold mist generators (ultrasonic humidifiers).
Authored by: Anonymous on Thursday, January 10 2008 @ 09:11 PM PST Supercapacitor Contest!
You can use a charged capaciter and connect it to a pager motor with a small fan attached. This will cause the lightweight aircraft to hover arround the room.

spartas_phalanx(at)hotmail.com
Authored by: Anonymous on Thursday, January 01 2009 @ 02:04 PM PST Supercapacitor Contest!
a high voltage Marx generator.
Authored by: Anonymous on Wednesday, April 08 2009 @ 11:17 AM PDT Supercapacitor Contest!
THROW THEM AT A CAT!!! :)
Authored by: Anonymous on Saturday, July 11 2009 @ 08:12 AM PDT Supercapacitor Contest!
YES! I like the way that guy thinks!
Authored by: Benjiman on Sunday, April 12 2009 @ 03:49 PM PDT Supercapacitor Contest!
Get two cheap & blunt Samurai swords, take apart. Build bank of these caps into handles, +ve to blade and -ve to cable out bottom (and vice-versa for blade 2), attach sword handles with power cable, so its a big open circuit until sword blades hit.

Now you have electric swords. Fight in the dark for sparking action!

Authored by: Anonymous on Wednesday, May 20 2009 @ 10:32 PM PDT Supercapacitor Contest!
make regenerative brake for bicycle
Authored by: Nonya-Biz on Tuesday, July 14 2009 @ 08:19 PM PDT Supercapacitor Contest!
a quick charge mp3 player would be ausome. caps in bowth charger, and the player for power.

would need to limit the current but 2 would make 5v wich would be perfect.

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