Comments on: Polycarbonate fish uses three servos to swim http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/ Fresh hacks every day Fri, 10 Feb 2012 15:55:42 +0000 hourly 1 http://wordpress.com/ By: SIKDIDIT http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102292 Mon, 19 Oct 2009 07:19:50 +0000 http://hackaday.com/?p=17404#comment-102292 ROBO-FISH… Predecessor to the Tumanator 2000! It will become self aware on December 31st 2010!

]]> By: Amnon http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102288 Mon, 19 Oct 2009 06:15:39 +0000 http://hackaday.com/?p=17404#comment-102288 gomer pyle the torque is so small ( and it getting smaller after the water proofing ) that this problem is irrelevant on this prototype.

]]> By: gomer pyle http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102250 Mon, 19 Oct 2009 02:04:29 +0000 http://hackaday.com/?p=17404#comment-102250 Sure it’s cool, but is it SAFE?
You could possibly get your fingers caught and pinch yourself…better put on a helmet before you build this.

]]> By: Roberto http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102237 Mon, 19 Oct 2009 01:32:39 +0000 http://hackaday.com/?p=17404#comment-102237 Do robot fish dream of electric… coral reefs?

]]> By: Amnon http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102210 Sun, 18 Oct 2009 23:06:06 +0000 http://hackaday.com/?p=17404#comment-102210 I have used water proofing technique from this tutorial

http://www.societyofrobots.com/actuators_waterproof_servo.shtml

and I tested it for more then a week in side a bucket of water (with no extra presser)

Amnon

]]> By: Jeff http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-102206 Sun, 18 Oct 2009 22:56:49 +0000 http://hackaday.com/?p=17404#comment-102206 TRAXXAS has a line of waterproof servos: http://www.traxxas.com/products/accessories/trx_accessories_servos.htm. The warranty only covers “splashing” but I’ve had some run about 100 hours at 3 feet without leaking. Coating all the o-rings with marine grease helps.

]]> By: sneakypoo http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101952 Sat, 17 Oct 2009 23:49:10 +0000 http://hackaday.com/?p=17404#comment-101952 @Caleb Kraft: “Page break”, that makes more sense, I can live with that. Thanks :)

]]> By: donk http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101936 Sat, 17 Oct 2009 22:30:27 +0000 http://hackaday.com/?p=17404#comment-101936 Be careful dipping electrical components in epoxy – some epoxies reach temperatures high enough to damage them. Look for a slow-set epoxy or one that will cure in a refrigerator.

Worked for me on a college project, after destroying a few circuits and being confused for a few days.

For connections…we ran everything into small pelican boxes through drilled holes, and sealed the holes with epoxy… for this, though, maybe use a waterproof matches case or something similar from a dive shop.

Just my two. Cool project.

]]> By: Caleb Kraft http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101927 Sat, 17 Oct 2009 22:08:55 +0000 http://hackaday.com/?p=17404#comment-101927 We have to split longer articles up into two parts so our front page doesn’t get overrun by a single article. The page break is often referred to as just the “break” on blogs. I recall finding it a bit weird at first too.

]]> By: conundrum http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101925 Sat, 17 Oct 2009 21:55:59 +0000 http://hackaday.com/?p=17404#comment-101925 perhaps encase the electronics in polymorph, then use a magnetic contact (maplins sell these called Magtrix) for the programming and power… you could also use optics for programming.

]]> By: Amnon http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101913 Sat, 17 Oct 2009 21:07:01 +0000 http://hackaday.com/?p=17404#comment-101913 As you can see there is a coca cola cap on the controller board. The cap is screwed to a small piece of a coca cola bottle . And it should have use for sealing a connector from the water. The idea was to connect the programmer to the controller using a connector that will be under the cola cap .

This idea didn’t work this time due to a connector problem . The problem evolved after the circuit was submerged in epoxy .

In this Cap trick , I can re program and recharge the battery , using a conventional wired method. But the wireless suggestion is very neat!

Amnon

]]> By: sneakypoo http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101910 Sat, 17 Oct 2009 21:02:54 +0000 http://hackaday.com/?p=17404#comment-101910 A completely off topic question here but I have to ask. As a non native english speaker, what’s up with the “after the break” sentence I see in every other post both here and at places like Giz? I know it’s used on TV for commercials and such but it just doesn’t make any sense to me here and it’s driving me bonkers! :P

]]> By: xeonon http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101906 Sat, 17 Oct 2009 20:26:17 +0000 http://hackaday.com/?p=17404#comment-101906 Just a thought… put the electronics in a ziplock bag. Cheap, and will keep them dry. Added benifit of being able to program it later. Worth a try at least.

]]> By: thethirdmoose http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101905 Sat, 17 Oct 2009 20:22:20 +0000 http://hackaday.com/?p=17404#comment-101905 You should try making an inductive charger and a wireless programmer. Those two combined will let you seal it and still recharge/reprogram it.

]]> By: Potterda42 http://hackaday.com/2009/10/17/polycarbonate-fish-uses-three-servos-to-swim/comment-page-1/#comment-101902 Sat, 17 Oct 2009 19:47:33 +0000 http://hackaday.com/?p=17404#comment-101902 Very nice, I would also have liked to see it dipped in molten glue. I like this idea, perhaps there is a way to waterproof it using removable casing?

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