🚀 go-pugleaf

  For about 15 years I have fantasized about building an EEG interface
to my home computer, to use for home sleep research.  My early efforts were
unsuccessful.  All I need is advice on how to make a simple amplifier circuit
to the following specifications:
  The input signal (from elecrodes on my scalp) is in the range of 1-50 
microvolts, at 1-100 Hz, presumably with very low current.  For safety reasons, 
the circuit should be powered by a low voltage, say 5, 9 or 12 volts.  The
voltage signal must be amplified into something that can be measured
conveniently.  Because of the low input voltage, my impression is that the most
popular op-amps would be inapproriate.
  OK, it would also be good to turn this into a digital signal that can be
sampled by the computer at roughly 100 Hz.  Can this be simply done?      
Please point me to any relevant references and introductory material.  Thanks.
-Chris B.
YQDX@VAX5.CIT.CORNELL.EDU
Cornell Biochem Dept