On Friday Ai Ling, Tim, Glenn and I headed over to Erik Sanchez's
physics lab in SB2 to take a look at his vacuum chambers. Glenn set up
the meeting, since he worked with Erik a few years ago when he built an
electron microscope out of spare parts (sheesh, some people have all the

Now I hate to coin a new phrase, but vacuum chamber envy is just about
right. Erik has a giant vacuum chamber that actually needs a hydraulic
lift to open the top of the chamber. Yes, it's that big. As Glenn noted,
it's "microsatellite" big, so Erik will be hearing a lot from us, I think.

On some Friday afternoon in the next 0-2 weeks, I'd like to do that
pressure test we've been talking about. This means hooking up some
to-be-determined analog pressure sensor and the SCP1000 digital pressure
sensor to an LPC2148, and then have the LPC2148 steam the current
reading using a UART. We have a giant "Conflat" connector with a
bzillion leads, so we'll be able to send power, ground, RX and TX into
the chamber.

- Ai Ling needs to find us an analog pressure sensor
- Maria needs to talk with Andrew and Tim and think really hard if we
can use the SCP1000 as a barometric altimeter. It might just be too
slow... so we might want to go with a absolute analog version? Let's
talk Tuesday.
- Jeremy (ADC) and Mike (SPI) need to get the interface to the pressure
sensors working ASAP.


Andrew Greenberg

Portland State Aerospace Society (http://psas.pdx.edu/)
and...@psas.pdx.edu  P: 503.788.1343  C: 503.708.7711

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