[ANSS-netops] Earthworm Guide Channel Triangle Wave Generator

[Gray Jensen]

The Earthworm triangle channel will work with any function generator that can produce a reasonably linear triangle wave signal that is close to +/- 2.0 volts (4vp-p) and 2.0 hz.  Attached is a PDF of a simple circuit circuit that will do the trick.  I can provide Gerber files, etc. for a PCB for this circuit if you email me at the address below.

Gray Jensen
USGS (retired)
gjensen at usgs.gov

  ----- Original Message ----- 
  From: David C Wilson 
  To: anss-netops at geohazards.usgs.gov 
  Sent: Friday, October 15, 2010 12:47 PM
  Subject: [ANSS-netops] Earthworm Guide Channel Triangle Wave Generator



  Hello, 

  I am sending a note here on behalf of HVO, they are experiencing problems 
  with their Earthworm Guide Channel Triangle Wave Generator.  It seems to 
  be producing spikes that are causing DAQ restarts and subsequent data gaps. 

  Does anyone have a spare Triangle Wave Generator or at least the schematics 
  so that they can build a new one? 

  Thanks, 
  Dave 

  David Wilson
  US Geological Survey                                    
  Albuquerque Seismological Laboratory  
  P.O. Box 82010                                                    
  Albuquerque NM 87198-2010




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