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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.
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.
Routed gas gauge on power board
Routed signals attached to fuel gauge on power board.
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.
Preliminary power board placement complete
Placed all parts on power test board in what I believe will be theirapproximate final locations. No routing done yet. Board probably won'tget bigger, because I left room to grow.
Partial placement of power board
Placed AVR, FTDI chip, and USB port on power test board, along withtheir accessory components. They are probably pretty close to theirfinal resting place but may move a little bit later.
Changed IO voltage for FTDI IC on power board
Changed VCCIO input for FTDI chip on power test board from USB_VCC tointernally generated 3.3V signal. This should have no power effects, butKevin suggests that it may make the chip behave a litte bit nicer (not...
Fixed ERC errors from unconnected wires
Some wires created in the previous few commits were not actuallyconnected to the pins they ended at. I fixed them.
Changed Schematic
Tied USB Shield pin to ground
Added activity LED's to the FT232 chip using the TXLED and RXLED pins
Changed Schematic Per Kevin Woo's Email
Changed U5 VSS from GND to VBATT_GND
Added GND PIN connection to ISP header
Switched USB_TX and USB_RX pins on the microcontroller to use the hardwaresupported UART pins. Also switched TX and RX connections.
Updated Schematic File
Added missing capacitor between Vin and GND in the charge circuit.
Fixed some schematic errors identified by the ERC.
Connected capacitor C12 which apeared connected but was actuallydisconnected.
Approved error of VCC being connect to a power input
Added a missing junction
Updated DS2786 footprint in kwoo library
Updated package footprint for DS2786 in kwoo.lbr based on recommendedland placement in datasheet for DFN10 package. DS2786's datasheet listsTDFN10 as its package type but doesn't give placement guidance or auseful package description. Unable to find a datasheet for TDFN10, but...
Increased mini-USB plug drill hole size
Imported MINI-USB- device from Hirose Connectors library into kwoolibrary. In UX60-MB-5S8 package, increased drill hole size on cornerpins from .8 mm to .9 mm. I did not drill out the original too-smallholes on Scoutfly, so I don't know whether this is sufficient or not....
Updated inductor package for power board
Created new package and device in library for MPI4040 inductor to beused in power test board. Updated part on power test board.
Fixed GND pad on LT3650 charger IC
LT3650 package in kwoo.lbr had a polygon around a through-hole pad toapproximate a large SMD pad connected by a via directly to the groundplane. Created a new package that is like this one but has no via, just anormal SMD pad. Used this package in the power test board, which has no...
powerboard placed, needs routing
Fixed gas gauge and charging components
Added extra decoupling capacitor between battery voltage and ground nextto charging circuit to allow board to run with charger but no battery.Connected system side of gas gauge sense resistor to GND to make allcurrent returning to battery go through sense resistor. Removed 0 Ohm...
Added missing components around AVR on power board
Added ISP header, pullup resistor for AVR reset line, and decouplingcapacitors for AVR power lines. Connected ISP header to SPI interface onAVR.
Finished USB interface on power board
Added decoupling capacitors to FTDI chip, changed signaling VCC from USBVCC to AVR VCC so that AVR can signal to FTDI chip. Added USBTX andUSBRX signals between FTDI chip and AVR.
Started to add USB port to power board
Added USB port and USB-UART converter to power board schematic. I thinkthe converter has enough hooked up to it to run without burning up, butit's not hooked up the AVR yet.
Shorted GND to BATT_GND in power schematic
Connected GND and BATT_GND to eachother using a 0 Ohm resistor. I wantto keep the signals separate to ease routing, but they need to beconnected to ensure that all of the current that needs to go through thefuel gauge sense resistor does so.
Fixed ERC errors
Added some missing junctions and a missing label. Approved "no value" warnings for parts for which a value would be nonsensical.
Started making kwoo's recommended changes
Made changes to charging circuit: Connected CLP to VIN on U1. Addeddiodes to charge BOOST capacitor from battery and provide currentsensing inductor with outlet if power turns off (don't really understandhow the latter works). Adjusted inductor to 4.7uH after re-calculating...
Update prefixes and names for two parts
Updated prefixes for DS2786 and MP1702 in kwoo.lbr to U so that Eaglewon't use the default prefix, U$, for them. Also manually updated namesin charging_test.{sch,brd}.
Added pullup resistors and an LED to power test
Added pullup resistors for I2C connections to power test board. Alsoadded a diagnostic LED to indicate when the AVR has power. Stillprobably needs an ISP header and USB controller/port.
First draft of power testing circuit schematic
Fleshed out power testing circuit. It is still missing a few things, andI don't understand every little bit of it, but it probably won't look alot different when it's done. Added some passive components on the...
Updated charging test circuit from kwoo library
Ran update command in charging_test.sch to update parts from kwoo.lbr.
Added kwoo's standalone charging schematic.
charging_test.sch is a standalone circuit schematic for a prototype totest the charging circuit that will ultimately go on Scoutfly. kwoocreated it. It uses some new parts, but I don't know that much about it...