Circuit board team meeting minutes for 01/23/2012¶
Power test board - Julian, Abe¶
- What has been done so far?
- Attached ISP programmer and powered board with 7V on battery input
- Unable to connect to AVR with programmer
- What was happening when disfunction started?
- AVR started heating up
- Abe emailed kwoo asking for help debugging circuit
- What is current state?
- When no battery voltage is applied, resistance between VBATT and BATT_GND is 146.6 Ohms
- No voltage drop appears across gas gauge LDO (took supply voltage up to 5.2V)
- AVR LDO just drops input voltage by 1V
- One 49.9K resistor measures as 25K (possible false alarm)
- Pushbutton controller starts in off position, switches state normally on button presses
- EN voltage is VBATT when on but VBATT - .8V when off
- As a result, AVR LDO is always on
Scoutfly Eagle file update - Abe¶
- No progress since Wednesday
- Will meet with Ben, Misty, and Tom on Thursday at 17:30 to get them started on it
USB port device in library - Ben, Misty, Tom¶
- Progress?
- SMD package already in library
- Still need to verify correctness
Eagle installation¶
- Attempt to install student edition of Eagle on computers
- Considering getting Eagle 6 licenses
Future meeting time¶
- Wednesday 20:30 - 22:00 in the club
Attendance¶
- Present: Ben, Julian, Misty, Tom
- Excused absence:
- Unexcused absence:
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