14 December 2009 - Meeting with Pietro

Recapitulation of the systems

System 0 - JPL hardware. 16 channels, 0.4Hz. Not fast enough to see the fine-grained behavior.
System 1 - High temporal res USB-based 4-channel card. Sample at up to 100Hz with 22 bits signal. A piece of rag soaked with the odorant is placed in a small cup and slid under the sensor. The sensor is dangling in a paper cylinder. The odor is presented for 30s, then off for 30s, on again etc.
System 2 - Same USB card, with airflow modulated by hand-squeezing a rubber bellows attached to a glass jar. The sensor is hanging inside the jar.
System 3 - Sensor in a long-thin chamber with the puffing bellows at one end.

Edgardo is starting response vs. concentration study, on the 2 new sensors he sprayed.

We will meet Friday to look at the results.

Probably from Digikey:

Elsewhere:

Data logger w/ temperature and humidity (so I can do tests on systematic)
- Problem so far is that none of them write non-proprietary files
- Oh well, get one anyway
Sniffer
- Best options for modulating this?
Can something like this be used to modulate smells, or the humidity, for testing purposes?
Here's a multi-purpose gadget that could (conceivably) serve as a sniffer and a humidity modulator at the same time! Pretty cool. Do more research on this.
This might make a good chamber for putting the sensor in and controlling heat and/or humidity?

Automatic software gain set working properly
- Replaces the not-so-useful hardware gain set command
Visual feedback
- Writing up something in wxpyton now
- Really helpful for seeing, real-time, what's going on

Before talk need: