Started routing charging updated charging circuit
Routed some of charging circuit in updated Scoutfly. Modeled partposition after that on power test board. Moved diode and capacitor outof the way to get inductor closer to charging chip. This will make it...
Fixed angle errors in Scoutfly power update.
Scoutfly power update now passes DRC.
Moved power parts in Scoutfly layout
Moved parts for new Scoutfly power circuit from edge of layout to their(very) approximate final locations. Changed the battery and chargerconnectors from vertical to horizontal Molex connectors.
Added Scoutfly files with new power circuit
Switched Scoutfly from old power circuit to new power circuit from powertest board. Did this in a new file so that, if the power circuit turnsout to be a failure, other changes made contemporaneously to Scoutfly...
Added power board CAD files, deleted autoroute
Added files used for manufacture of power test board. Removed copy ofpower test board files used to run autorouter, as it will not be usefulnow that manually routed version has been manufactured.
Turned on "always vector font" in Eagle options
While editing power test board, turned on the "Always vector font" option in Eagle. Honestly, I might have done something else to thesilkscreen, but I can't remember what. I'm pretty sure I didn't messwith any of the actual components.
Fixed silkscreen ugliness in power board
Went through layout and changed ugly names and values to good ones.Moved text off of vias and pads and out from under things. Deletedgiant, useless USB port and ISP header labels. Added description, dateof design, and attribution in corner.
Adjusted position of VUSB decoupling cap
Increased widths of several high-current traces
Mostly GND around charging circuit and gas gauge
Decreased trace width between gas gauge resistors
Decreased width of trace between 49.9KOhm resistors in gas gauge voltagedivider to reduce noise.
Widened battery and charger traces
Widened to 20 mils some traces that come from the battery and chargerconnectors, because they carry higher currents.
Added ground poly under charger IC
Added polygon under LT3650 IC and updated it to new device from kwoolibrary. It now has effectively both a ground pad and a via. Slight areaof no contact right around via may be unavoidable.
Widened traces, moved gas gauge power supply
Widened traces that carry VBATT. Lined up decoupling capacitors for LDOswith their connected LDO ports. Rerouted various traces ripped up duringexecution of previous changes.
Rerouted decoupling caps and pullup around AVR
Rerouted decoupling capacitors and new pullup resistor around AVR toincrease trace width for power inputs and decrease unneccessary loops.
Fixed USB circuit problems
Routed USB_TX and USB_RX more directly. Put decoupling capacitors on FTDIchips closer to the inputs they decouple.
Changed center ground pad for DS2786 and LT3650
Changed ground pads for packages 10MSOP and 12TDFN to have through-holepads on the bottom instead of SMD pads. Updated power test board to usethe new DS2786. Drew a polygon of BATT_GND around center pad. Not sure...
Updated power test schematic
Based on feedback from Kevin, added a pullup resistor to !PWR_INT anddecoupling caps to the LDO providing VCC.
Also changed the ground signal on the gas gauge LDO from GND toBATT_GND. Kevin pointed out that having BATT_GND as the ground for the...
Minimized possible inductive loop in power board
Moved trace driving FAULTLED to minimize area of inductive loop invicinity of charger.
Finished power board routing (first attempt)
Routed all signals on power test board. There are no airwires, and theboard passes DRC. I believe I have kept the inductive loops near thecharger pretty small, but they could probably be improved. I also made...
Partially routed charger on power test board
Routed some of the signals connected to the charger IC on the power testboard.
Routed gas gauge on power board
Routed signals attached to fuel gauge on power board.
Started to route LDO signals
Started routing the signals attached to one of the LDOs.
Finished routing AVR and FTDI, started pushbutton
Finished routing signals connected to AVR and FTDI on power test board.Started routing signals attached to pushbutton controller.
Routed USB circuit and most of AVR on power board
Routed most of the signals connecting the USB port, FTDI chip, and AVR.
Changed USB port drill holes back to spec
Looked at mini USB port with Dan. Observed that corner drill holes aresupposed to be multiple drills right next to eachother. Decided tochange holes back to specfied radius and ignore long hole for now.
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