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Keith Packard [Sat, 30 Dec 2017 18:47:37 +0000 (10:47 -0800)]
Replace TSV521 with MCP6541UT
MCP6541UT is a drop-in replacement for the no-longer-available TSV521
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 30 Dec 2017 18:05:28 +0000 (10:05 -0800)]
Use Bdale's hack for clearing copper away from cut-outs
This places an explicit copper trace along the edge of the cut-out
area, with clearline set so that the fill on the rest of the board is
kept away from the edge, leaving a clear space for the router to pass
through.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 30 Dec 2017 18:03:30 +0000 (10:03 -0800)]
Switch to shorter USB cable. Add enclosure.
Update schematic to reference shorter USB cable and add explicit
reference to enclosure.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Mon, 13 Mar 2017 16:45:21 +0000 (09:45 -0700)]
Make most attributes invisible in schematic
Keith Packard [Mon, 13 Mar 2017 04:33:27 +0000 (21:33 -0700)]
Remove attributes which are now in preferred-parts
Avoid conflicts and allow future changes to be adapted here.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 12 Mar 2017 00:16:17 +0000 (16:16 -0800)]
Use common makefile
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Mon, 2 Mar 2015 23:51:26 +0000 (15:51 -0800)]
Switch voltage divider resistor values to 470/8.45k
This appears to make the comparator work more reliably with bright LEDs
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 19 Jan 2014 16:39:07 +0000 (08:39 -0800)]
Update version number to 2.0
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 19 Jan 2014 16:33:19 +0000 (08:33 -0800)]
Make pin 1 of FT230 square on PCB. Update R2 value in PCB from SCH
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 13 Sep 2013 18:52:20 +0000 (11:52 -0700)]
Switch divider resistor to 270 from 10k
This makes the device far more sensitive, which works now that it's
stuck in a box away from the light.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Wed, 11 Sep 2013 21:03:13 +0000 (14:03 -0700)]
Use side-firing blue LED for monitoring
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 18 Jun 2013 04:36:41 +0000 (21:36 -0700)]
µPusb variant for Hammond box
Prototype attempt to shield light and make the box less fussy
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Mon, 18 Mar 2013 23:17:06 +0000 (16:17 -0700)]
Switch to shared symbols and packages
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 10 Feb 2013 10:06:24 +0000 (02:06 -0800)]
Change all resistors to panasonic 1/10W 1%
Try to settle on one family to keep life easier
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Thu, 24 Jan 2013 21:06:39 +0000 (13:06 -0800)]
Change label to say MicroPeak USB interface
Trying to be consistent
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 15 Jan 2013 22:34:34 +0000 (14:34 -0800)]
Build stencil in 'all' target
Avoids mistakes when sending files off
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 15 Jan 2013 22:30:08 +0000 (14:30 -0800)]
Update to shared scheme files
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 15 Jan 2013 22:29:14 +0000 (14:29 -0800)]
Add digikey part number to FT230
Signed-off-by: Keith Packard <keithp@keithp.com>
Bdale Garbee [Sun, 6 Jan 2013 19:00:13 +0000 (12:00 -0700)]
add stencil target
Keith Packard [Wed, 2 Jan 2013 17:46:10 +0000 (09:46 -0800)]
build zip file always
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 29 Dec 2012 07:56:00 +0000 (23:56 -0800)]
Add the USB resistors back in
These can protect the board from an accidental cable mishap, so we'll
put them in just in case.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 29 Dec 2012 07:23:54 +0000 (23:23 -0800)]
Oops. Got the FT230 D+/D- lines swapped
Flip them around, and remove the 33ohm resistors at the same time.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 29 Dec 2012 06:39:14 +0000 (22:39 -0800)]
Playing with other resistor values
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 18 Dec 2012 06:55:22 +0000 (22:55 -0800)]
Update resistor values to match what works. Add LED.
Testing revealed that the phototransistor appears to need quite a bit
of current to get the rise time within reasonable limits. Change the
resistor feeding it to 680 ohms (from 3.3k). This also required
changing the op-amp bias voltage from 1/2VCC to 90% VCC. Swapping in a
1k resistor for the 10k there fixed that nicely.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 14 Dec 2012 19:15:58 +0000 (11:15 -0800)]
Add outline
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 14 Dec 2012 06:09:13 +0000 (22:09 -0800)]
Add some silk to the back side
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 14 Dec 2012 06:01:40 +0000 (22:01 -0800)]
Finish the first version of the board
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 14 Dec 2012 02:37:30 +0000 (18:37 -0800)]
Import preliminary schematic
Signed-off-by: Keith Packard <keithp@keithp.com>
projects / hw / mpserial / log