Rename to 'ChaosKey' Signed-off-by: Keith Packard <keithp@keithp.com>
Switch to usbAmale connector Replace the pcb-usb "connector" with a real connector. Looks like the 4ucon ones will be just fine Signed-off-by: Keith Packard <keithp@keithp.com>
Switch to the usbAmale connector We can get these for $0.12 from 4ucon, that's likely to be way cheaper than ordering a custom board thickness Signed-off-by: Keith Packard <keithp@keithp.com>
Fix attributes with gattrib Added DK numbers, load status, moved data around to make it sensible Signed-off-by: Keith Packard <keithp@keithp.com>
Shove ink around to make it usable for loading boards Signed-off-by: Keith Packard <keithp@keithp.com>
Use the available LQFP-32 package This makes the board larger, and doesn't let it fit in the cute little box, but uses a component we can actually get. Signed-off-by: Keith Packard <keithp@keithp.com>
Finish single source version Replace components with smaller parts. Fit into small New Age enclosure. Connect 20V supply to v_usb. Signed-off-by: Keith Packard <keithp@keithp.com>
Start work on single high-voltage source version This removes the low-voltage noise source and micro match debug connector to see if we can't fit it in the tiny USB dongle package used for µPUSB v3.0. Not quite there; the noise source has too many huge packages still Signed-off-by: Keith Packard <keithp@keithp.com>
Switch one MSOP8 pad from round to square Cutting stencils requires square pads Signed-off-by: Keith Packard <keithp@keithp.com>
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>
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>
Add words to the back silk
Layout version with dual noise sources and STM32F042 processor Signed-off-by: Keith Packard <keithp@keithp.com>
Shuffle board part labels around to make them usable Signed-off-by: Keith Packard <keithp@keithp.com>
add version number to the silk
op amps only need picoamps of bias, so use 1M resistors for the divider
select resistor values, update attributes
fixes from Keith's initial design review
update to use a miso pin for the random bits
initial design capture