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Keith Packard [Tue, 6 Jan 2015 04:37:34 +0000 (20:37 -0800)]
Use keithp-friendly muffin template
This sticks the refdes values in each label
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Tue, 6 Jan 2015 04:37:12 +0000 (20:37 -0800)]
Switch one MSOP8 pad from round to square
Cutting stencils requires square pads
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 26 Dec 2014 03:30:52 +0000 (19:30 -0800)]
Fix D2 goof-up. Adjust value silk positions
Oops. When sticking the silk text on the back, I must have rotated D2
accidentally, which puts the pads in the wrong location. I've moved
them back, but the first build is gonna be awkward.
Also moved all of the component value text around to make it usable.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Fri, 26 Dec 2014 02:40:03 +0000 (18:40 -0800)]
Fix component values and DK parts numbers
Add DK part numbers for all of the passives. Fix some of the passive
component values so they're reasonable.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Wed, 24 Dec 2014 11:08:54 +0000 (03:08 -0800)]
Add words to the back silk
Keith Packard [Wed, 24 Dec 2014 10:31:06 +0000 (02:31 -0800)]
Layout version with dual noise sources and STM32F042 processor
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Wed, 24 Dec 2014 08:07:54 +0000 (00:07 -0800)]
Add a 20V darlington source. Switch to STM32F042 (Schematic changes only)
This provides *both* the low current zener noise source and a new 20V
darlington noise source to see which one works better.
The low current zener source has been updated to filter the input
power and provide for both low-pass filtering and configurable gain in
both op-amp stages to allow for more experimentation.
Signed-off-by: Keith Packard <keithp@keithp.com>
Keith Packard [Wed, 24 Dec 2014 04:43:17 +0000 (20:43 -0800)]
Shuffle board part labels around to make them usable
Signed-off-by: Keith Packard <keithp@keithp.com>
Bdale Garbee [Mon, 24 Feb 2014 06:26:47 +0000 (23:26 -0700)]
add version number to the silk
Bdale Garbee [Mon, 24 Feb 2014 01:17:14 +0000 (18:17 -0700)]
op amps only need picoamps of bias, so use 1M resistors for the divider
Bdale Garbee [Mon, 24 Feb 2014 01:10:36 +0000 (18:10 -0700)]
select resistor values, update attributes
Bdale Garbee [Sun, 23 Feb 2014 23:43:26 +0000 (16:43 -0700)]
fixes from Keith's initial design review
Bdale Garbee [Sun, 23 Feb 2014 23:13:47 +0000 (16:13 -0700)]
update to use a miso pin for the random bits
Bdale Garbee [Sun, 23 Feb 2014 18:20:16 +0000 (11:20 -0700)]
initial design capture