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[web/altusmetrum] / EasyTimer / index.mdwn

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 # EasyTimer
 
 This board provides two programmable timer-based pyro channels with tilt
-limits.  
+limits.  It is the same size and shape with the same connector layout as
+our [EasyMini](../EasyMini) flight computer.
 
 The IMU used is the same as on TeleMega and EasyMega, allowing acceleration 
 based launch detection, and gyro-based tilt limiting.  This means it's 
@@ -14,10 +15,18 @@ For projects that require staging or air starts, EasyTimer is a low-cost
 alternative to use of our more expensive products, while retaining the safety 
 aspects of tilt-limiting.
 
-There is no EasyTimer firmware yet, but it will be part of the 
-[AltOS](../AltOS) suite eventually.
+EasyTimer firmware and associated configuration software is part of the 
+[AltOS](../AltOS) suite.
 
-Prototypes of v1 are underway.  This design is not yet for sale.
+Photos of the first production unit (the current version 2 looks nearly 
+identical!):
+
+<a href="v1/easytimer_v1_top.jpg"> <img src="v1/easytimer_v1_top-thumb.jpg"></a>
+<a href="v1/easytimer_v1_smt.jpg"> <img src="v1/easytimer_v1_smt-thumb.jpg"></a>
+
+EasyTimer v2 is available for sale now at 
+[Bdale's web store](http://shop.gag.com/flight-computers/easytimer.html) 
+and from Altus Metrum distributors.
 
 ## Features ##
 
@@ -31,9 +40,34 @@ Prototypes of v1 are underway.  This design is not yet for sale.
 
 ## Artifacts ##
 
+There is a single manual for EasyTimer and most other Altus Metrum products,
+which is available in [html](../AltOS/doc/altusmetrum.html) and 
+[pdf](../AltOS/doc/altusmetrum.pdf) formats.
+
 This board was designed using lepton-eda and pcb-rnd.
 
 The hardware design files are available from 
 [git.gag.com](http://git.gag.com) in the project 
 [hw/easytimer](http://git.gag.com/?p=hw/easytimer;a=summary).  
 
+For those who don't have ready access to the gEDA suite, here are pdf snapshots
+of the files for current production PCB version 2 in more easily readable form:
+
+* [schematic](v2/easytimer-sch.pdf)
+* [pcb artwork](v2/easytimer-pcb.pdf)
+* [bill of materials](v2/partslist.csv)
+
+## Previous Versions ##
+
+All versions of EasyTimer have the same user-visible features and 
+specifications, except that v1 did not contain on-board flash data storage
+making post-flight analysis .. "challenging".  Other than that, the 
+differences are primarily in the choice of processor and sensors, which 
+is driven by availability.
+
+Here are the schematics, artwork, and bill of materials for version 1:
+
+* [schematic](v1/easytimer-sch.pdf)
+* [pcb artwork](v1/easytimer-pcb.pdf)
+* [bill of materials](v1/partslist.csv)
+