Review of sound card photogates

[James Cameron]

An interesting paper on arXiv ... http://arxiv.org/abs/1103.1760

- shows various photogate sensor designs for attachment to microphone
  inputs,

- describes variations in how microphone inputs on sound cards are
  wired,

- points out some of the value of purpose-built software as opposed to
  use of common tools like Audacity.

-- 
James Cameron
http://quozl.linux.org.au/