Applied Sensors Chapter 5 Wire and Fire Procedure
  1. Build the 555 timer circuit shown on page 128
  2. Wire the conductance probes between pins  2 and 3 of the 555 timer chip
  3. Run test555.bs2 program
  4. Get results of cnt value
  5. Do the math to get the duration value (P132)
  6. Run the calibrate555.bs2 program with new duration value (P133)
  7. Test 1 - You should see 100E-7 and 100000 (100K)  in debug
  8. Fine Tune the duration value (if needed)
  9. Test 2 - Put another 100K resisor in parallel (Debug results should be approx 1/2)
  10. Conduct your experiment using conductance results from a modified calibrate555.bs2 program