I have been thinking of creating a seismograph for some time now, but studies blocked my way and the project was put on hold.
Now that it's almost summer, i'm thinking of making it as a summer project and bringing it back to life.
I'm thinking of creating a Lehman seismograph and having a magnet on the beam brush past a coil (similar to this setup: http://www.vaxman.de/projects/.....meter.html ) and because i'm planning to have a raspi NFS server online 24/7, i could probably use an interface of some sort and have it log the data.
Being in the Philippines, which is situated in the Pacific ring of fire, i'm expecting alot of seismic activity. I have everything planned out in my mind, the only problem i have is the interface from the coil to the raspi
I was thinking of having it connected to a USB sound card microphone jack then record it 24/7 with an audio recorder (i've been looking hours on the net to find a soundcard-based seismometer data logger to no avail) and view the waveform later on. But because it's the Raspberry Pi, i can probably use a gertboard then have a seismograph recorder of some sort record the signal (again WHERE IS THE PROGRAM D: )
The interface part is a tough nut to crack, so i will need some help with it.
Thanks in advance