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weatherbox:dragonfruit:meeting_minutes_february_27_2017 [2017/02/28 02:03] tyamauchi [Tasks] |
weatherbox:dragonfruit:meeting_minutes_february_27_2017 [2021/09/19 21:59] (current) |
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| * Tested board 3 (previously deployed) transmission with irradiance | * Tested board 3 (previously deployed) transmission with irradiance | ||
| * This board would end transmission whenever | * This board would end transmission whenever | ||
| + | * By suggestion of Garrett we removed the V-switch from the board and connected the load voltage from an adafruit charging chip to the board | ||
| + | * by doing this we are able to bypass our own charging chip and provide power using the adafruit charging chip | ||
| + | * need to simulate sunlight fluctuation using the lamp | ||
| ==== Problems ==== | ==== Problems ==== | ||
| * Parts on board 5 were desoldered off of the decommissioned board 4 | * Parts on board 5 were desoldered off of the decommissioned board 4 | ||
| Line 11: | Line 14: | ||
| * Debug populated board 5 | * Debug populated board 5 | ||
| * Some parts need to be swapped out | * Some parts need to be swapped out | ||
| - | * Continuity test of board 5 | + | * Continuity test of board 5 |
| - | * Decide where to place diodes, 0Ω resistors, and new parts | + | |
| - | * Swap solar panel connector | + | |
| * Create another spot on csv file for measuring voltage at XBee pin | * Create another spot on csv file for measuring voltage at XBee pin | ||
| * Will be used to look for ghost voltage | * Will be used to look for ghost voltage | ||
| + | * Nathan said we might not be able to do it : Correction we might be able to use it | ||
| + | * Debug LED flag : turn on led and keep it on after Ghost voltage is perceived | ||
| + | * ADC6 might be able be a input chart | ||
| * 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 | ||
| + | * 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 | ||
| + | * 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 | ||
| + | * ** The VBATT connection is directly connected to the MCU ** | ||
| + | * Incorporate a voltage divider to that connection. | ||
| + | * Add decoupling capacitor to the vswitch connection (may or may not matter) | ||
| + | * Charging chip debug LED tests | ||
| + | * 1 - 5bit number to voltage tests | ||
| + | * this is used to make sure that the charging chip follows tryston's charging chip behaviors | ||
| + | * to be completed for adafruit charging chip and dragon fruit charging chip | ||
| + | * 5bits = 31 in decimal | ||
| + | * 0 = 3V | ||
| + | * 9 = 3.9V | ||
| + | * 13 = 4.3V | ||
| + | * 20 = 5V | ||
| + | * 2 - Use 3 debug LEDs to visually indicate when switching between solar panel and battery | ||
| + | * LED 1 : Vload = Solar Panel | ||
| + | * LED 2 : 4.3 < Vload < 4.5 (around the voltage that Vload switches from Panel to Battery power) | ||
| + | * LED 3 : Vload = battery mV | ||
| + | * If all are off, then the load voltage is between 4.3V and battery voltage | ||
| + | * Need to connect Vload to MCU | ||
| + | * 3 - Use LEDs to flag Ghost voltage, low XBee voltage, and dropped transmission | ||
| + | * LED 1 : Ghost voltage is 4V (this is much too high for XBee power) | ||
| + | * LED 2 : XBee voltage at less than 2.7V (full range is 2.7 - 3.6V) | ||
| + | * LED 3 : flag for transmission (we do not know how to do it yet) | ||
| + | * Need to connect XBee power to MCU | ||