Search found 113 matches

by jaem
Sun Jun 17, 2007 9:32 pm
Forum: General Discussion
Topic: Stepper Motor ID'ing and hookup
Replies: 13
Views: 5093

Thanks - that's exactly what I was looking for!

Although, for the record, the motor has 11 connections - see my first post for that. (some go to two 4-pin surface mount components with no model number, and where they go from there, I don't know)

I'll try that as soon as I can.
by jaem
Sun Jun 17, 2007 9:31 am
Forum: General Discussion
Topic: Stepper Motor ID'ing and hookup
Replies: 13
Views: 5093

ok... is there any way to test the connections on the ribbon cable to determine how to hook it up before? I thought I read something about continuity testing for the coils... I guess the main thing I need to know is whether it's bipolar or unipolar - I have some info that might help me after that. C...
by jaem
Wed Jun 13, 2007 3:58 pm
Forum: General Discussion
Topic: Stepper Motor ID'ing and hookup
Replies: 13
Views: 5093

Stepper Motor ID'ing and hookup

Hello, I have a motor sitting in my junk drawer, which I am pretty sure is a stepper motor. (I've never actually used one, so I could be wrong, but it seems to fit the description.) The trouble is that I can't figure out what type it is, and thus how to connect it to anything. (And, yes, I'm aware i...
by jaem
Sun Mar 18, 2007 2:42 pm
Forum: General Discussion
Topic: IGBTs for Beginners
Replies: 2
Views: 2252

IGBTs for Beginners

hey, I ordered some (free samples! of) IGBTs from ST the other day, just out of interest, but aside from the basic concept of them, I don't really know anything about them - my textbook this year had a one page section on them. Does anyone know where I can find a good beginner's reference on them? I...
by jaem
Fri Feb 23, 2007 10:22 pm
Forum: General Discussion
Topic: Looking for "non-existent" IC datasheets
Replies: 8
Views: 4166

If it's made by or for Poineer products, then it probably has something to do with Audio or video. Being a small DIP device without much heatsinking, I doubt it is a final amplifier but it may be an audio decoder (like dolby) of some sort in the preamp chain. it said "decoder" on the PCB ...
by jaem
Wed Feb 21, 2007 5:04 pm
Forum: General Discussion
Topic: Looking for "non-existent" IC datasheets
Replies: 8
Views: 4166

sorry - not intending to **Bump**... I got an e-mail from Pioneer, and they said that they "don't have datasheets for their ICs"... go figure! They sent me a page from a service manual containing it, and it's used in a laserdisc player - based on it's location, and the limited (one page) v...
by jaem
Thu Feb 15, 2007 5:37 pm
Forum: General Discussion
Topic: Looking for "non-existent" IC datasheets
Replies: 8
Views: 4166

sorry, I meant to include some of that...

the Motorola is a 14-DIP
and the Pioneer is a 22-DIP

The board was silkscreened with "Decoder IC" under the Pioneer chip; no idea what the other one is...
by jaem
Thu Feb 15, 2007 3:49 pm
Forum: General Discussion
Topic: Looking for "non-existent" IC datasheets
Replies: 8
Views: 4166

Looking for "non-existent" IC datasheets

Hello, I'm looking for datasheets for a couple of ICs that I pulled out of some old boards, and I'm having no luck... The first is a Motorola L8242 - the only hit on Google that isn't spamdexed junk is a site selling lingerie with the same model number, so there's no point in looking there - I phone...