30-40g is kinda high.

What is the usual radius of a pylon turn and what speeds are we talking about? about?

John,

I will gladly keep you informed. I am not sure what you mean by web addresses for the people I am using. I assume you mean for the hardware I am looking at using.

The MC is made by TI:
http://www.ti.com/corp/docs/landing/...Other+OT+ez430

I have not yet decided on an accelerometer. I have a few different ones coming in the mail from 2 different companies. I have two different chips coming from Freescale Semiconductor (mma6262q, mma7260qt) and one from ST Mirco (lis3l02as4).

The TI chips are nice and cheap, and if they are usable for this, should make assembly of that part a breeze since they can be soldered on directly to headers and easily replaced if needed. It might even be possible to use the Target board profile as a template for mounts for other MC should the need for more data storage arise.

I tried to find some TH accelerometers, but they only ones I found were SMT and I had a hard enough time finding these few that were offered as samples. I have no problem switching to a different chip if needed, I just didn't want to waste the money upfront on experimentation.

Going back to assembly, I don't mind soldering the small stuff. I am qualified to do it (IPC J-stnd), but for ease of use and debug I would rather make it as easy as possible to swap parts around. If I get stuck using SMT accelerometers (which looks to be the case) I will plan on making a board similar to what is produced by Bellin Dynamic Systems (www.beldynsys.com) with the proper footprint that is as small as possible with only the traces and holes needed. I would then try and cram as many as I could onto one of the 2.5x3 in. budget boards that ExpressPCB does and cut them apart myself. If I can keep the cost to under $10 a board, I should be fine.