-# AltusMetrum
+[[!meta title="OpenAlt"]]
+# OpenAlt
This is the design that started it all! Bdale got frustrated with existing
commercial altimeters and decided to build his own. This project was
-presented in talks at LCA, SCALE, OLS, and Debconf in 2008.
+presented in talks at LCA, SCALE, OLS, and Debconf in 2008.
Here are photos of the front and back sides of the version 0.1 prototype PCB,
which was 100% auto-routed on 2 layers using the
* the 3-axis accelerometer has a max scale of +/- 6g. This is insufficient
for characterizing the kinds of motors that we're playing with now.
-* while using a gcc-based toolchain to cross-develop for the ARM7 core works
- reasonably well, it's a heavy toolchain to build and maintain, and the
- processor really is serious overkill for the task at hand.
+* while using a gcc-based toolchain to cross-develop for the ARM7 core worked
+ reasonably well, in 2008 it was a heavy toolchain to build and maintain,
+ and the processor was serious overkill for the task at hand. Since then,
+ ARM Cortex SOCs have become so cheap, and the required toolchain so well
+ supported in [Debian GNU/Linux](https://debian.org) and elsewhere to change
+ this from a bug to a feature.
## Artifacts ##
2008. Note that there are many photos included, so this is a HUGE file!
The version 0.1 design had enough issues that Bdale decided not to publish
-it. Work on an 0.2 revision is mostly complete at the schematic level, and
+it. Work on an 0.2 revision was mostly completed at the schematic level, and
some printed circuit board artwork updates were made, but a second run of
-boards was never attempted. This design is now mostly of historical interest.
+boards was never attempted. This design is now entirely of historical
+interest.
## Futures ##