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Keith Packard [Wed, 12 Nov 2014 03:04:00 +0000 (19:04 -0800)]
Replace FTD230 with LPC11U14
Also adds an LDO and xtal. Net BOM is about $0.50
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Wed, 12 Nov 2014 01:02:01 +0000 (17:02 -0800)]
Switch to on-board USB connector
This constructs a USB connector right on the PCB, saving the cost of
that connector, simplifying construction and giving back a lot of
board area.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Mon, 16 Jun 2014 22:30:12 +0000 (15:30 -0700)]
Update enclosure and USB connector info
Add black enclosure part, add USB connector info
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Mon, 16 Jun 2014 22:26:42 +0000 (15:26 -0700)]
Fix one of the mounting hole geometries
Keith Packard [Mon, 12 May 2014 06:42:06 +0000 (23:42 -0700)]
Add note about enclosure
Keith Packard [Sun, 11 May 2014 06:08:19 +0000 (23:08 -0700)]
Replace plated-through mounting holes with unplated vias
The oshpark boards I got didn't consistently fit over the mounting
pegs in the boxes. I'm hoping that the unplated holes will be more
consistent. And, if not, at least this board won't count on the ground
conduction through these holes and so I can get a 130mil drill and
clean them out.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 11 May 2014 05:39:11 +0000 (22:39 -0700)]
Set resistor values to 470/8.45k. Update schematic to 3.0
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sun, 11 May 2014 02:48:58 +0000 (19:48 -0700)]
Update USB connector data
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Sat, 15 Mar 2014 01:35:31 +0000 (18:35 -0700)]
Re-do the layout for the new age 090604-FU enclosure
This box uses a standard USB A connector poking out the side, rather
than needing a cable.
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