another funny spotted on FB

[web/gag.com] / homeshop / cncfpga / index.mdwn

diff --git a/homeshop/cncfpga/index.mdwn b/homeshop/cncfpga/index.mdwn
index 89158c4ba36f02c55e00f4439b4c86881c96dc6f..09832ca742d135407d979da8098711a26cebd253 100644 (file)
--- a/homeshop/cncfpga/index.mdwn
+++ b/homeshop/cncfpga/index.mdwn
@@ -7,11 +7,15 @@ I converted to servo-based CNC operation.  It is compatible with the
 [Pluto-P](http://www.knjn.com/FPGA-Parallel.html) 
 [servo driver](http://linuxcnc.org/docs/html/drivers_pluto_p.html) in EMC2.
 
-These are photos of our current production version: 
+These are photos of the first prototype raw boards: 
 
 <a href="v0.1/cncfpga-top.jpg"> <img src="v0.1/cncfpga-top-thumb.jpg"></a>
 <a href="v0.1/cncfpga-bottom.jpg"> <img src="v0.1/cncfpga-bottom-thumb.jpg"></a>
 
+And here's a photo of one of them loaded:
+
+<a href="v0.1/cncfpga-proto.jpg"> <img src="v0.1/cncfpga-proto-thumb.jpg"></a>
+
 ## Features ##
 
 ### User View ###
@@ -24,7 +28,7 @@ These are photos of our current production version:
 * dual-color LED, green when PC heartbeat present, red when not
 * green LEDs on each of the three power supply rails
 * RC low-pass filtering on all input pins
-* 5.1 x 2.5 inch 4-layer board 
+* 5.1 x 2.5 inch 4-layer board, fits in Hammond 1590P1 die-cast aluminum box
 
 ### Developer View ###
 
@@ -41,6 +45,23 @@ These are photos of our current production version:
 The design files can be found on [git.gag.com](http://git.gag.com) in the 
 project [hw/cncfpga](http://git.gag.com/?p=hw/cncfpga;a=summary).  
 
+## Issues ##
+
+Notes about things learned or observed during debugging:
+
+* The RC networks for the input pins are closer to the stacked 15-pin 
+  connectors than I'm really comfortable with.  Nothing is making contact or
+  shorting, but I'd be tempted to increase the spacing on a future board cut.
+* The SMT 330uF cap is kind of a pain, and doesn't seem all that mechanically
+  solid after reflow.  Switch this for a through-hole part in the future?
+
 ## Future Plans ##
 
-As of December 2011, version 0.1 is out for circuit board fabrication.
+As of late December 2011, the first prototype v0.1 board has been loaded and
+is being debugged and tested.  If the board "works for me", then I'm likely 
+to make enough of these to sell to others who are interested.
+
+Unfortunately, in June of 2013, our house fell victim to the 
+[Black Forest Fire](http://www.gag.com/blackforestfire.html).  The
+prototypes of this board were lost, along with everything else.  I do not
+know if or when I might ever get back to this...