tag:blogger.com,1999:blog-7294135473370786875.post7680645737300755514..comments2014-07-17T18:57:29.528-04:00Comments on Project Potpourri: Magic Smoke and MirrorsDUhttp://www.blogger.com/profile/15427884103652875815noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-7294135473370786875.post-11166229377482683732008-11-19T07:18:00.000-05:002008-11-19T07:18:00.000-05:00Yes, I see now that the pumps are submersible, whi...Yes, I see now that the pumps are submersible, which doesn't work for me. Well...I could probably disassemble and make it work somehow. But meh.<BR/><BR/>This SSV is pretty cool, thanks.DUhttps://www.blogger.com/profile/15427884103652875815noreply@blogger.comtag:blogger.com,1999:blog-7294135473370786875.post-18074672229896164832008-11-18T23:49:00.000-05:002008-11-18T23:49:00.000-05:00submarine webpage I don't think the ones he used h...<A HREF="https://mywebspace.wisc.edu/tstanford/web/index.htm" REL="nofollow">submarine webpage</A> <BR/><BR/>I don't think the ones he used had garden hose attachements. However, from my limited understanding of what they're intended for, there has to be some sort of hose attachment.Davehttps://www.blogger.com/profile/14854096881452687343noreply@blogger.comtag:blogger.com,1999:blog-7294135473370786875.post-69010512832476422992008-11-18T19:23:00.000-05:002008-11-18T19:23:00.000-05:00Whoa whoa whoa. I've been looking for medium size...Whoa whoa whoa. <BR/><BR/>I've been looking for medium sized (i.e. bigger than aquarium, smaller than huge) pumps for a long time now. Do you know if they have a regular garden hose attachment?<BR/><BR/>And does your brother's autonomous submarine have a webpage?DUhttps://www.blogger.com/profile/15427884103652875815noreply@blogger.comtag:blogger.com,1999:blog-7294135473370786875.post-15450437264985144472008-11-18T18:58:00.000-05:002008-11-18T18:58:00.000-05:00My brother used TIP-120 NPN-D Darlington transisto...My brother used TIP-120 NPN-D Darlington transistors for the motors he used in his autonomous submarine. However, his <A HREF="http://www.go2marine.com/product.do?no=44132F" REL="nofollow">motor</A> only drew 2.5 amps.<BR/><BR/>A quick 'drill motor' search on google shows me some drill motor specs, and a lot of other motor vendors.Davehttps://www.blogger.com/profile/14854096881452687343noreply@blogger.comtag:blogger.com,1999:blog-7294135473370786875.post-5758285187416462502008-11-18T08:44:00.000-05:002008-11-18T08:44:00.000-05:00Reasons I'm using this motor:1) I tried using some...Reasons I'm using this motor:<BR/><BR/>1) I tried using some tiny-to-medium motors and they weren't nearly enough. This was the next biggest thing I had.<BR/><BR/>2) I was already using the battery from the drill to power the project.<BR/><BR/>3) I later realized that this whole thing will be outside in the cold. I probably need to overdesign the power so that it will work in much-reduced circumstances. <BR/><BR/>But you've definitely nailed one of my nagging worries with the speed control. My drill works the same. <BR/><BR/>I think the thing in the magic box that looks like a transistor IS a transistor. I looked up the data sheet on that but couldn't find it. However, I did find a comment in Russian that looked like it was saying the transistor was up to 8A. But it's a 20-25A motor. Maybe that's a transient number that the transistor can handle while 8A is continuous?<BR/><BR/>Maybe I should ditch my whole rubegoldbergian relay setup and get power transistor that can handle good amount of current? Then I could control the speed directly and simply.DUhttps://www.blogger.com/profile/15427884103652875815noreply@blogger.comtag:blogger.com,1999:blog-7294135473370786875.post-26721809756121488242008-11-18T08:32:00.000-05:002008-11-18T08:32:00.000-05:00Presumably, you're using a drill motor because you...Presumably, you're using a drill motor because you actually need all that power (300 W) and torque? Because if you're using the drill motor because it was free, it sounds like you aren't doing yourself any favors. I know my drill goes at a different speed based on the depth of the trigger I pull. Since I don't expect you want it spinning as fast as possible, unless you have some sort of gear box, I presume you know how the switch handles going at different speeds? <BR/><BR/><BR/><BR/>Have you tried looking up drill motor data sheets?Davehttps://www.blogger.com/profile/14854096881452687343noreply@blogger.com