document the chosen Hammond box

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

diff --git a/homeshop/cncfpga/index.mdwn b/homeshop/cncfpga/index.mdwn
index edaf47f26adab9565ec9511a27262c989d7de30c..2f847d512b91f697b18d74535054d2111df92cc9 100644 (file)
--- a/homeshop/cncfpga/index.mdwn
+++ b/homeshop/cncfpga/index.mdwn
@@ -7,6 +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 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 ###
@@ -17,13 +26,15 @@ I converted to servo-based CNC operation.  It is compatible with the
 * 9-pin female D-shell connector for misc signals
 * barrel connector for 9-12 volt DC power input
 * dual-color LED, green when PC heartbeat present, red when not
-* 5.1 x 2.0 inch 4-layer board 
+* 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, fits in Hammond 1590P1 die-cast aluminum box
 
 ### Developer View ###
 
 * Hardware Features
        * [Altera](http://altera.com) ACEX EP1K10TC100 FPGA
-       * [Microchip PIC12F629](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010113) for heartbeat detector
+       * [Atmel ATtiny10](http://www.atmel.com/dyn/products/product_card.asp?part_id=4558) for heartbeat detector
 * Tools Used
        * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
 * Licenses
@@ -34,7 +45,16 @@ I converted to servo-based CNC operation.  It is compatible with the
 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.
+
 ## Future Plans ##
 
-As of November 2011, a first pass design is complete but no prototypes have
-been built yet.
+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.