link TeleDongle content into main page

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@@ -40,9 +40,14 @@ various friends!
 # Projects #
 
 * [TeleMetrum](TeleMetrum/) 
-is our current project, a dual-deploy rocketry altimeter with improved sensor 
+is our primary project, a dual-deploy rocketry altimeter with improved sensor 
 complement and bidirectional RF telemetry link.
 
+* [TeleDongle](TeleDongle/) 
+is a simple RF interface for use in ground stations interacting with rockets
+using [TeleMetrum](TeleMetrum/).  It may also be useful as a generic RF
+interface for other microcontroller systems.
+
 * [AltOS](AltOS/) 
 is the name of the firmware and related utilities that Keith maintains for
 the set of hardware projects here.