pulse motor Working video and info

[Thaelin]

   Gosh, someone else is actually in oregon?  I live in PDX myself.    Greets at ya.

thaelin

[tropes]

Can anyone tell me part numbers for the hall sensor? And does the transistor need the 1k pot as seen here in pics http://rpmgt.org/SSG.html for dialing in?

Ren
The unipolar Hall sensor is made by Allegro Microsystems, part#: A3121EUA.
The bipolar Hall sensors I bought as a bundle of 40 from Electronic Goldmine in Arizona or online at
http://www.goldmine-elec.com/
Unipolar are sensitive to South Pole only; bipolar swith on with South and off with North Pole.
Peter

[Ren]

hmmm. Thanks Peter. I had a look at the stats on the hall I brought and it was only rated for 5v. Would this one do the trick?

http://www.rsaustralia.com/cgi-bin/bv/rswww/searchBrowseAction.do?D=hall&Nr=AND%28avl%3aau%2csearchDiscon_au%3aN%29&Ntk=I18NAll&Nty=1&Ntt=hall&Dx=mode%20matchpartial&Ntx=mode%20matchpartial&N=0&name=SiteStandard&forwardingPage=line&R=1811441&callingPage=/jsp/search/search.jsp&BV_SessionID=@@@@0524714585.1188943532@@@@&BV_EngineID=ccdladdllikegikcefeceeldgkidhgm.0&cacheID=aunetscape

I will place order with Allegro if it isnt as I cant find any suppliers of that particular sensor here in Australia.

[tropes]

hmmm. Thanks Peter. I had a look at the stats on the hall I brought and it was only rated for 5v. Would this one do the trick?

To understand unipolar, latching and bipolar Hall switches read:
http://www.allegromicro.com/en/Products/Design/an/an27705.pdf
I think what you want is a non- latching unipolar switch rated for up to 24v.
Peter

[Ren]

Thanks Peter!  Two thumbs up! Your simple post and link taught me more than 3 supposed electronics experts could (well you should know your stuff if you work in an electronic component store). Your right, I am after a unipolar switch which is non latching, i.e switches on in the presence of a magnetic field and switches off in its absense.

Thanks mate! I'll order some from RS here in Aus and see how they go.

Sorry just realized above link I provided was incorrect. product I was reffering to was number 181-1441 seen at http://www.rsaustralia.com. There are uni, bi and latched types