+* [TeleNano](TeleNano/)
+is a tiny rocketry altimeter with telemetry using only a barometric
+pressure sensor
+
+* [TelePyro](TelePyro/) is a companion board for [TeleMetrum](TeleMetrum/)
+that adds 8 additional pyro channels.
+
+* [TeleScience](TeleScience/) is a companion board for
+[TeleMetrum](TeleMetrum/) that adds 12 channels of thermistor or generic
+analog sensor input, and 5 general purpose I/O lines.
+
+* [TeleShield](TeleShield/) is an [Arduino](http://arduino.cc) radio shield.
+
+* [TeleTerra](TeleTerra) is a hand-held ground station for use with
+[TeleMetrum](TeleMetrum/) and [TeleMini](TeleMini/).
+
+# Hobby Rocketry #
+
+The motivation for the circuits and software you will find on this site is
+our loosely-knit group's shared interest in hobby rocketry. This very brief
+[Ted presentation by Steve Jurvetson](http://www.ted.com/talks/steve_jurvetson_on_model_rocketry.html)
+quickly conveys at least part of why we do this. John Coker
+has published an excellent
+[overview of hobby rocketry](http://www.jcrocket.com/welcome.shtml)
+on his web site. Keith has also put together some useful notes about the
+process of [certification](http://keithp.com/rockets/certification/) to
+fly high power rockets.
+<p>
+To find more information about the rockets Bdale and his son have built, see
+[Garbee Rockets](http://www.gag.com/rockets).
+<p>
+As Bdale and Robert became more experienced in the hobby and started to build
+and fly more sophisticated projects, we started to feel limited by the
+existing electronics products available. OpenAlt was Bdale's first
+attempt to address this situation with a completely open hardware and software
+design... other project have since followed, and it's cool to have help from
+Keith and other friends!
+
+# [Using Altus Metrum Products](Uses) #