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Model Forum / General / Railroads / December 2007Li'l tiny motors
Found a source today for really tiny motors; took apart a PDA/phone thingy that someone had discarded, and found the vibrator in one corner of the circuit board. It's a little DC motor, about 7/16" long by 3/16" diameter, driving an unbalanced weight. Probably could power all kinds of things by removing the weight. Made for surface mounting. >Found a source today for really tiny motors; took apart a PDA/phone >thingy that someone had discarded, and found the vibrator in one corner >of the circuit board. It's a little DC motor, about 7/16" long by 3/16" >diameter, driving an unbalanced weight. Probably could power all kinds >of things by removing the weight. Made for surface mounting. Electronic Goldmine, one of my absolute favorite places to buy such things, has a great selection of them. Not a one of them is over $1.29US and all are new. No desoldering required. http://www.goldmine-elec-products.com/products.asp?dept=1107 -- Ray On 12/29/2007 3:03 AM Ray Haddad spake thus: >>Found a source today for really tiny motors; took apart a PDA/phone >>thingy that someone had discarded, and found the vibrator in one corner [quoted text clipped - 6 lines] > $1.29US and all are new. No desoldering required. > http://www.goldmine-elec-products.com/products.asp?dept=1107 Yeah, I figured there was a way to get these little buggers without having to cannibalize consumer units. Sure enough, http://www.goldmine-elec-products.com/prodinfo.asp?number=G13566 is just like the one I pulled out (and one sale for $1). So what ideas do folks have for using these? I was thinking they're *almost* small enough to think about making something like a homemade "flea" unit, like those powered trucks NWSL makes (still?) for HO. >*almost* small enough to think about making something like a homemade "flea" unit, like those powered trucks< Problem is these motors have no torque so powered trucks wouldn't work. Also they would need a way to be geared down which would be a lot of work. So they would be useful for anything that would work at the rpm they have and didn't require torque. > So what ideas do folks have for using these? I was thinking they're > *almost* small enough to think about making something like a homemade > "flea" unit, like those powered trucks NWSL makes (still?) for HO. I've seen one of these in a scratch built Nn3 Shay also had sound!! WOW!! Way/Whey/Weigh cool. I've seen this a couple of GATS (or whatever they are calling themselves now) shows. I can't remember the name of the modular group he belongs to. These things are almost as common as dirt: http://www.allelectronics.com/cgi-bin/item/DCM-320/search/TINY_VIBRATING_MOTOR_.html I'm sure there are any number of other sources. Paul N. > > So what ideas do folks have for using these? I was thinking they're > > *almost* small enough to think about making something like a homemade [quoted text clipped - 12 lines] > > Paul N. It's going to need a very large gear reduction before it will do anything useful and (multiple) worm/pinion reductions are inefficient enough to use up all the available torque. One could use multiple stage spur gear reduction between 2 or 3 shafts but that's going to be a lot of very fine gears! Perhaps it could drive Diesel loco fans with a rubber belt drive - I'm a steam loco man. HO workman with pneumatic drill miniscene? Greg.P. David is this newsgroup about toy trains about sourcing new parts or distribution? you seem to have a problem with my posts. so you found a new source...am I to contact you to get more information? Please post the scope and use of this newsgroup on toy trains for all to see. > Found a source today for really tiny motors; took apart a PDA/phone thingy > that someone had discarded, and found the vibrator in one corner of the > circuit board. It's a little DC motor, about 7/16" long by 3/16" diameter, > driving an unbalanced weight. Probably could power all kinds of things by > removing the weight. Made for surface mounting. > David is this newsgroup about toy trains about sourcing new parts or > distribution? you seem to have a problem with my posts. so you found a new > source...am I to contact you to get more information? Please post the scope > and use of this newsgroup on toy trains for all to see. Are you incredibly stupid as well as an a.shole, or just playing obtuse on purpose? No one would have complained if you posted a reference to an interesting or cheap source of electrical or scratchbuilding parts. But you persist in continual messages abou individual items you are selling on eBay. We all know where to find eBay if we want. We might not know and might not find goldmine or other sources, so sharing info with NO PART PLAYED BY PERSONAL GAIN is appreciated. Your selfishness is not. FOAD.  SignatureSteve > David is this newsgroup about toy trains about sourcing new parts or > distribution? you seem to have a problem with my posts. so you found a new > source...am I to contact you to get more information? Please post the scope > and use of this newsgroup on toy trains for all to see. [snip] I don't usually reply to spammers, but you've raised my hackles: a) although most people will ignore notices of e-Bay auctions, some people are annoyed, because this is a discussion group, not an advertising group. If you have some useful information about model trains or toy trains, post it. For example, you may have found an easy way to get rid of rust on old AF tracks. b) if people want to know about e-Bay auctions, they go to e-Bay. So your posts informing about stuff you have on e-Bay are utterly pointless. c) you top-post, which indicates that you don't in fact read to the end of whatever scribblings you are responding to. d) you've used the same verbiage in several "answers" to posts. e) This particular post about li'l tiny motors provided useful information, about a surprising place to find these critters, and the follow-ups provided more, about a commercial source for them. Not provided, please note, by that source, but by someone who has used that source for all kinds of useful Stuff. Bye, bye. >Found a source today for really tiny motors; took apart a PDA/phone >thingy that someone had discarded, and found the vibrator in one corner >of the circuit board. It's a little DC motor, about 7/16" long by 3/16" >diameter, driving an unbalanced weight. Probably could power all kinds >of things by removing the weight. Made for surface mounting. You can get these in a number of ways: - Like you discovered, any junked phone or pager with a vibrate feature has one. The problem is they have an offset weight (hopefully) glued or (sadly, more likely) welded to the output shaft that makes them wobble under power. If you can get it off, you're all set, but it's easy to trash the motor while trying to do it. - Microrobot places like solarbotics.com sell them in a clean form, for example http://www.solarbotics.com/products/tpm2/. - If you can find a radio sh.t store that still sells zip-zap cars, they are powered by these motors, and you'll also have a nice selection of gear work, mounts, and even a neat controller you can salvage. * Signature* PV something like badgers--something like lizards--and something like corkscrews. |
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