Re: home brew tachometer

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Michael Rhodes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rhodes-at-fnrf.science.cmu.ac.th>

You need to set the scope to 'line' trigger mode.  The scope
will then trigger at 50 (60Hz) and the pulse from your sensor
applied to one channel.  The pulse will drift left or right if
your motor is not synched and will stay on the scope in one
position if it is in sync.

--Michael

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, August 09, 2001 11:27 AM
Subject: Re: home brew tachometer


> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
>
> Hi Marc,
>
> Absolutely! A scope can be used to check the rotational speed. All you
need
> to do is trigger the
> scope on each revolution (the Al tape you thought of, prox sensor, light
> sensor, or whatever).
>
> Bart
>