Joe Gwinn
Stainless
- Joined
- Nov 22, 2009
- Location
- Boston, MA area
In the now closed (why? the title is perfectly clear to me) recent Taylvel thread, I mentioned that the legacy electronic circuitry was simple to implement using present-day electronics, and mentioned that I had dug into the building of such a level.
These kinds of levels can detect the slight changes in local earth surface slope due to imperceptible passing seismic waves and the like. They were originally built for exploration of large surface plates to find low and high spots. These days, optical means are typically used for this.
Anyway, for those who are interested, the original thread was on the <rec.crafts.metalworking> usenet newsgroup circa April 2009. Many references are given. Search for "taylvel" and "gwinn" to recover the traffic. Here is one hit in that thread, as a starting point.
Precision Electronic Levels - The Germans Arrive
These kinds of levels can detect the slight changes in local earth surface slope due to imperceptible passing seismic waves and the like. They were originally built for exploration of large surface plates to find low and high spots. These days, optical means are typically used for this.
Anyway, for those who are interested, the original thread was on the <rec.crafts.metalworking> usenet newsgroup circa April 2009. Many references are given. Search for "taylvel" and "gwinn" to recover the traffic. Here is one hit in that thread, as a starting point.
Precision Electronic Levels - The Germans Arrive
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