Attended: Kevin, Gordon, Tyler

• Transmission Test 1
  • Board lasted for 17 hours
  • Battery voltage was last recorded as 3.7V therefore unsure why board stopped transmitting
    • could be due to Ghost voltage or marginal short
    • Could also be due to Gateway crashing
  • After power cycling board, the board powered on and started transmitting

• Transmission Test 2
  • Board lasted for 56.3 hours
  • Battery voltage was last recorded as 3.0V meaning the battery discharged before ending transmission
  • HOWEVER, once power cycled the board was able to send heartbeat packets

One other thing that i thought was odd was that i could power cycle the board, and it started working again. It would transmit and send heartbeat packets. This to me screams that we had another marginal short, because whenever the shorting happens, we find that the board still gets powered but stops transmitting. This would explain why the board could get power cycled and work, but the voltage was very low. the battery continued to drain even though the board stopped transmitting.

I am currently doing another test with a full battery. this time I'm testing how long it will last with a solar panel and irradiance sensor attached this time.

I also talked to tryston and he's thinking we should just redesign the board already.

I believe all our problems are because of the charging chip, so figuring out a way to power the board without using the planes might work.

Im gonna ask Gordon to see if he can make sure we have the required parts to populate another board. I will help you. But for now, try find the parts list in the old DragonFruit Scel folder. It should still be there in the archive. We should try to look through our available parts in the lab to find out what we still need.

Kevin could you begin redesigning the board layout? as in the planes around the charging chip. see if we can change them to vias. I want to see if its possible to also use a different packaging for the charging chip. Garret and brian already bought another package so we might be able to use it (meaning its the same exact part, but it will be much easier to solder on). Gordon and i should also do some research into that stuff.

As for me, Im going replace the charging chip on the circuit to see if that works. Also I'm going to be working on finalizing the 3D print of the housing components and send them to Tyrin. Apple stopped working so theyre trying to get the key to the roof. If possible, we might be able to deploy and see if the circuit works while its being charged by the solar panel. * * Dylan helped work on an arduino code will help us monitor the voltages on the XBee

• The board works fine, and we didn't do anything

• Test XBee transmission when in contact with metal and without
• Reprint housing bottom and Solar Panel holders (put holes in the screw places)
• Use diode to avoid power from XBee
  • Find an appropriate diode
  • Find out where MCU could be powering the XBee from
• Program Dragonfruit board 5
• Measure for shorts
  • Oscilloscope
  • Talk to Ohta about possible plane tunneling issues
• Figure out if repeated use damages/degrades the performance of the board
• Test board after replacing Charging Chip
• Find surface mount charging chip part (redesign board to use this part, may solve shorting issues)
• Finalize Eagle schematics of GPS and RTC