X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=doc%2Ftelemetrum.inc;h=7ef9876f6439eeff0dc91b5d011df7a2d1a9fa31;hp=54185bff2f9d75038f2b808a3e81e4cfc725f413;hb=5b1bd4f87f682c1956e173a27414ceb076b20ceb;hpb=9aed128dc0aab5d49e1b3264c864a6c3e929bffe

diff --git a/doc/telemetrum.inc b/doc/telemetrum.inc
index 54185bff..7ef9876f 100644
--- a/doc/telemetrum.inc
+++ b/doc/telemetrum.inc
@@ -1,10 +1,10 @@
 == TeleMetrum
 
 	.TeleMetrum v2 Board
-	image::telemetrum-v2.0-th.jpg[width="5.5in"]
+	image::telemetrum-v2.0-th.jpg[width=400]
 
 	.TeleMetrum v1 Board
-	image::telemetrum-v1.1-thside.jpg[width="5.5in"]
+	image::telemetrum-v1.1-thside.jpg[width=400]
 
 	TeleMetrum is a 1 inch by 2¾ inch circuit board.  It was designed to
 	fit inside coupler for 29mm air-frame tubing, but using it in a tube that
@@ -17,6 +17,18 @@
 	fin can end of the board, meaning an ideal “simple” avionics
 	bay for TeleMetrum should have at least 10 inches of interior length.
 
+	There are two generations of the TeleMetrum design. The
+	major changes after v1 generation are:
+
+	* uBlox GPS chip certified for altitude records
+
+	* Higher power radio (40mW vs 10mW)
+
+	* APRS support
+
+	Otherwise, they're the same size, with mounting holes and
+	screw terminals in the same position.
+
 	=== TeleMetrum Screw Terminals
 
 		TeleMetrum has six screw terminals on the end of the board
@@ -25,8 +37,9 @@
 		circuits. Using the picture above and starting from the top,
 		the terminals are as follows:
 
+		.TeleMetrum Screw Terminals
 		[options="header",grid="all",cols="2,3,10"]
-		|=========================
+		|===
 		|Terminal #|Terminal Name|Description
 		|1	|Switch Output	|Switch connection to flight computer
 		|2	|Switch Input	|Switch connection to positive battery terminal
@@ -34,7 +47,7 @@
 		|4	|Main -		|Main pyro channel connection to pyro circuit
 		|5	|Apogee +	|Apogee pyro channel common connection to battery +
 		|6	|Apogee -	|Apogee pyro channel connection to pyro circuit
-		|========================
+		|===
 
 	=== Using a Separate Pyro Battery with TeleMetrum
 
@@ -49,14 +62,15 @@
 		stranded, into the GND hole just above the screw terminal
 		strip and solder it in place.
 
-		Connecting the positive battery terminal to the pyro
+		Connecting the switched positive battery terminal to the pyro
 		charges must be done separate from TeleMetrum, by soldering
-		them together or using some other connector.
-
+		them together or using some other connector. Note that you 
+		must include a switch in the positive lead from the pyro 
+		battery for safety!
 
 		The other lead from each pyro charge is then inserted into
-		the appropriate per-pyro channel screw terminal (terminal 4 for the
-		Main charge, terminal 6 for the Apogee charge).
+		the appropriate per-pyro channel screw terminal (terminal 4 
+		for the Main charge, terminal 6 for the Apogee charge).
 
 	=== Using an Active Switch with TeleMetrum