Search found 4 matches

by missouridave
Sun May 28, 2006 6:35 am
Forum: General Discussion
Topic: frequency counting for rpm
Replies: 7
Views: 2252

Let me correct some of my numbers:
This is a ten pole alternator, not twelve and the frquency at 900 rpm is 120 cps.
by missouridave
Sun May 28, 2006 6:26 am
Forum: General Discussion
Topic: frequency counting for rpm
Replies: 7
Views: 2252

I am trying to measure the engine speed of a railroad locomotive. The engine is directly coupled (shaft) to the alternator. There are a lot of these engines and the shaft is not easy to get to, so I don't really want to add any kind of pickup. That's why I thought measuring the frequency would be ea...
by missouridave
Sat May 27, 2006 7:11 pm
Forum: General Discussion
Topic: frequency counting for rpm
Replies: 7
Views: 2252

frequency counting for rpm

I want to measure rpm by counting the freqency of a 12 pole alternator. The range I need is 0-1000 rpm. Portabilty would be a plus. Any help would be appreciated.
Thanks,
Missouridave
by missouridave
Tue Mar 14, 2006 7:02 pm
Forum: General Discussion
Topic: Swap meet?
Replies: 22
Views: 7322

Re: Swap meet?

This web site:
http://www.freecycle.org/
has a concept that might work here. You can only give things away for free. It works well regionally, and could probably work for electronica, if someone (N&V) set it up.