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weatherbox:dragonfruit:meeting_minutes_march_20_2017 [2017/03/25 02:15] tyamauchi created |
weatherbox:dragonfruit:meeting_minutes_march_20_2017 [2021/09/19 21:59] (current) |
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| ==== Updates ==== | ==== Updates ==== | ||
| - | * Tested charging chip on board 5 with adafruit charging chip | + | * Debugging boards : charging chip of board 4 and 5 were compared with adafruit |
| - | * Behavior was exactly the same with solar panel | + | * Behavior was exactly the same |
| - | * Battery voltage = 3.245 V | + | * Battery voltage ≈ 3.245 V |
| * Max voltage output (at max irradiance) = 4.6V | * Max voltage output (at max irradiance) = 4.6V | ||
| - | * **Voltage load starts at 6.5V before lowering to 4.6V when max irradiance is applied at once** | + | * **Voltage load initially at 6.5V before lowering to 4.6V when max irradiance is applied at once** |
| * **Voltage load dips to 2.7V for a split second before settling back at 3.245V (battery Voltage)** | * **Voltage load dips to 2.7V for a split second before settling back at 3.245V (battery Voltage)** | ||
| - | * Conducted transmission tests with changing solar irradiance | + | * why is max voltage 4.6V? |
| - | * this was done using the adafruit charging chip | + | * Worked on eagle redesign of board |
| - | * we first let the board transmit for some time | + | |
| - | * then we played with the solar irradiance levels to see what conditions it will stop transmitting | + | |
| - | * Transmission testing outside | + | |
| - | * 1 - have board transmit indoors | + | |
| - | * 2 - move board outside into the sun | + | |
| - | * 3 - bring back inside | + | |
| - | * 4 - move board outside into sun but with solar irradiance and solar panels covered | + | |
| ==== Problems ==== | ==== Problems ==== | ||
| * Messed up on charging chip soldering | * Messed up on charging chip soldering | ||
| * NEVER solder the pad on the board itself, only the pad on the part | * NEVER solder the pad on the board itself, only the pad on the part | ||
| * Gateway was down so we weren't able to test the board | * Gateway was down so we weren't able to test the board | ||
| + | * Conditions indoors cannot replicate outdoor irradiance | ||
| + | * need to conduct irradiance testing outside with real sun | ||
| ==== Tasks ==== | ==== Tasks ==== | ||
| + | * Perform more tests of board under solar irradiance | ||
| + | * in direct sunlight, see if board stops transmitting | ||
| * Debug populated board 5 | * Debug populated board 5 | ||
| * Some parts need to be swapped out | * Some parts need to be swapped out | ||
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| * Look into power switching of charging chip | * Look into power switching of charging chip | ||
| * Tryston said that between 4.3 - 4.5V the board would be powered by the battery instead of the solar panel | * Tryston said that between 4.3 - 4.5V the board would be powered by the battery instead of the solar panel | ||
| - | * Use debug LEDs to set a flag if the board is not transmitting | ||
| - | * What do we flag? | ||
| - | * Make the XBee drop a packet using the light | ||
| - | * match XBee power drop to switch between solar panel and battery power | ||
| - | * Look into board behavior when light is on full blast | ||
| * Populate a new board as soon as new parts come in | * Populate a new board as soon as new parts come in | ||
| - | * Take off vswitch and connect to the charging chip load | ||
| - | * LEDs should act the same as the adafruit charging chip LEDs | ||
| * Populate a board with charging chip | * Populate a board with charging chip | ||
| * Charging chip debug LED tests | * Charging chip debug LED tests | ||