[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 ###
* 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 ###
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 mid-December 2011, version 0.1 raw boards and parts are in hand, a
-prototype will be assembled and tested as soon as the paste stencil arrives.
+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.
projects / web / gag.com / blobdiff