In a message dated 2/16/01 10:48:51 PM Eastern Standard Time, edwianni@........ writes: << Hi Everyone; I have just completed my first home built seismograph and I am feeding it into a chart recorder. I would now like to feed it into my computer but I don't know where or how to start. Any simple clear cut advice would help and be appreciated. Thank you very much. Ed. >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hi Ed, Like you I have just completed a home built seismograph. it is a vertical leaf-spring seismograph made from the plasterer's trowel Sean Thomas recommends. I first checked it out with an oscilloscope to see that it was putting out a signal and now I am recording it with "Windaq", a ~$100 Radio Shack A/D converter and software that converts a computer into a strip-chart recorder. Windaq is good enough for me to see that I am not recording the 6-second microseisms. My amplifier is an AD524 instrument amplifier. The "Windaq" converter shows me I need more amplification. After I get this thing recording the 6-second microseisms and its magnetic damping correctly adjusted, I'll probably replace Windaq with Larry's SDR program. Have fun and good luck, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>