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Updated design rules for power board
Updated design rules for power board to match DorkbotPDX specifications.This removed some of the DRC errors for the USB port and charger. Thecharger still has a couple that may be from inherently illogicalpackage specification.
Disapproved DRC errors on power board
Disapproved of previously approved DRC errors for power board. They areapparently legitimate problems that need to be taken care of.
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.
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...