Hi all -- This may be old news, but DataQ is selling their 4-channel 8-bit A/D converter (connects to PC via serial port) for $15 each. See: http://www.dataq.com/cgi-local/SoftCart.exe/products/startkit/di194.htm?E+sc store This could be part of a portable system with a laptop and a portable seismometer (geophone?). Use two or three amplifiers at different gains to feed different channels of the A/D to help with the limitation of only 8 bits. Might be fun to use while camping, on vacation, etc. Karl __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>