Ligne 20 : |
Ligne 20 : |
| This will deactivate the Pico 3.3V DC/DC regulator and spare the battery power. | | This will deactivate the Pico 3.3V DC/DC regulator and spare the battery power. |
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− | == Pico and PowerBoost 500 == | + | == Wiring a Lipo Booster on the Pico == |
| + | |
| + | === Pico and PowerBoost 500 === |
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| {{ADFImage|PowerBoost-500-Chargeur-01.jpg|320px}} | | {{ADFImage|PowerBoost-500-Chargeur-01.jpg|320px}} |
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| # Tied the '''PowerBoost EN pin''' to the ground : this disable the PowerBoost which stops to power up the Pico. The best approach. | | # Tied the '''PowerBoost EN pin''' to the ground : this disable the PowerBoost which stops to power up the Pico. The best approach. |
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− | == Pico and PowerBoost 1000 == | + | === Pico and PowerBoost 1000 === |
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| If you needs more Power to juice your project, a PowerBoost 1000 Charger can be used instead of a PowerBoost 500 Charger. | | If you needs more Power to juice your project, a PowerBoost 1000 Charger can be used instead of a PowerBoost 500 Charger. |
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| * to do the both operations at the same time. | | * to do the both operations at the same time. |
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− | == Pico and Sparkfun Lipo Charger/Booster == | + | === Pico and Sparkfun Lipo Charger/Booster === |
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| If you have a {{pl|2508|SparkFun 5V/1A Lipo charger/booster}}, this can also be used with this project. | | If you have a {{pl|2508|SparkFun 5V/1A Lipo charger/booster}}, this can also be used with this project. |
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| * to load the Lipo battery while the project consume some power (20mA max to ensure sleep operation). | | * to load the Lipo battery while the project consume some power (20mA max to ensure sleep operation). |
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− | == Pico, PowerBoost and Cansat Kit ==
| + | The great thing about the Booster/Charger is that microUSB connector is optional to charge the Lipo. |
| + | |
| + | Just powering the breakout with 5V on the '''5V USB''' will have exactly the same effect than plug-in the USB cable. |
| + | |
| + | [[Fichier:ENG-CANSAT-PICO-POWERING-12.png|800px]] |
| + | |
| + | [[Fichier:ENG-CANSAT-PICO-POWERING-13.png]] |
| + | |
| + | Here how it works. Please note that {{underline|only the Pico Micro USB}} is used in this setup. |
| + | |
| + | {{underline|'''When Pico is plugged on a computer:'''}} |
| + | |
| + | For sure, you can program and interact with the board. |
| + | |
| + | On the powering aspect: |
| + | # The Pico and its 3.3V regulator are powered via USB |
| + | # The Pico VBUS pin is set to 5V |
| + | # The Pico VSYS pin is also at 5V. Thanks to the diode, the 5V VSYS does not inject current into the 5V output of the Sparkfun Lipo Charger/Booster. |
| + | # The 5V VBUS (on the Pico) do power the Sparkfun Lipo Charger/Booster on the USB pin. As a result, the Lipo Charger/Booster does charge up the Lipo. |
| + | |
| + | Summary: the Pico is running (20 mA max) and the Lipo is charging. |
| + | |
| + | {{underline|'''When Pico is UNPLUG from computer:'''}} |
| + | |
| + | # The Pico VBUS is at 0V |
| + | # The Pico VSYS is at 0V (but this will change). |
| + | # The Pico regulator is not powered |
| + | # As the SparkFun Lipo Charger/Booster is running, it generates 5V on its '''5V Output''' Pin. The 5V push the current through the diode to '''VSYS''' |
| + | # The Pico VSYS now receives 5V (a bit lower due to the diode lost). So the Pico regulator is powered and generating 3.3V. |
| + | |
| + | Summary: the Pico is running and the Lipo is discharging. |
| + | |
| + | {{underline|'''How to power off:'''}} |
| + | |
| + | To power-off the Pico when the USB is unplug from the Pico, we have the following options: |
| + | # Tied the '''Pico 3V3_EN pin''' to the ground : that disable the Pico but the Lipo Charger/Booster is still discharging and producing 5V. |
| + | # Tied the '''Lipo Charger/Booster EN pin''' to the ground : this disable the the Power/Booster which stops to power up the Pico. The best approach. |
| + | |
| + | == Cansat Kit and Lipo Chargers == |
| + | === With Adafruit PowerBoost === |
| The {{pl|2271|Kit Cansat with Pico}} does have a footprint to receive an Adafruit PowerBoost 500 charger. This works exactly as described above but with all the wiring already done on the board. | | The {{pl|2271|Kit Cansat with Pico}} does have a footprint to receive an Adafruit PowerBoost 500 charger. This works exactly as described above but with all the wiring already done on the board. |
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| {{underline|About LBO pin}}: the LBO Pin is pulled high to '''BAT''' voltage (so 4.2V when battery is fully charged) in normal operation. When the battery voltage drops under 3.2VDC then the LBO pin is tied to the ground. | | {{underline|About LBO pin}}: the LBO Pin is pulled high to '''BAT''' voltage (so 4.2V when battery is fully charged) in normal operation. When the battery voltage drops under 3.2VDC then the LBO pin is tied to the ground. |
| | | |
− | == PowerBoost Status LEDs ==
| + | {{underline|'''PowerBoost Status LEDs'''}}: |
| + | |
| + | |
| The PowerBoost is filled with several LEDs indicating useful status. | | The PowerBoost is filled with several LEDs indicating useful status. |
| * <font color="blue">'''Blue LED'''</font>: next to the Powerboost USB A footprint, that LED indicates the '''5V output''' status. | | * <font color="blue">'''Blue LED'''</font>: next to the Powerboost USB A footprint, that LED indicates the '''5V output''' status. |
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| * <font color="#FFC300">'''Yellow LED'''</font>: next to the PowerBoost micro USB, the Lipo '''battery is charging'''. | | * <font color="#FFC300">'''Yellow LED'''</font>: next to the PowerBoost micro USB, the Lipo '''battery is charging'''. |
| * <font color="green">'''Green LED'''</font>: next to the PowerBoost micro USB, the Lipo '''battery is fully charged'''. | | * <font color="green">'''Green LED'''</font>: next to the PowerBoost micro USB, the Lipo '''battery is fully charged'''. |
| + | |
| + | === With SparkFun Lipo Charger/Booster === |
| + | The {{pl|2271|Kit Cansat with Pico}} does have a footprint to receive an Adafruit PowerBoost 500 charger. This can also be used with a {{pl|2508|SparkFun Lipo Booster/Charger}}. |
| + | |
| + | The Lipo charger must be wired to the Lipo Charger/Booster breakout as indicated in the assembly section the "[[ENG-CANSAT-PICO-ASSEMBLY|Assembling section]]". |
| + | |
| + | We do recommend to wire the Lipo Charger/booster UNDER the base plate (to preserve access to the Pico signals on the top). |
| + | |
| + | [[Fichier:ENG-CANSAT-PICO-CONTENT-50.jpg|640px]] |
| + | |
| + | Once soldered, plug a LiPo battery. |
| + | |
| + | {{ambox-stop|text=Some third-party LiPo cells have JST connectors wired opposite from the standard! Connecting these to the PowerBoost will damage your PowerBoost. Double check the polarity before connecting.}} |
| + | |
| + | {{Underline|'''What are the features:'''}} |
| + | * Plug the USB on the Pico to refill the LiPo. |
| + | * Unplug the USB to make the LiPo powering the CanSat. |
| + | * The PWR_OFF connector (near the border of the board) can be fitted with a switch. Close the switch (so PWR_OFF tied to the ground) to deactivates/shutdown the Lipo Charger/Booster. |
| + | * The status LEDs are visible under the CanSat (see next section for description). |
| + | * The SparkFun Lipo charger/booster do no offer LBO pin (Low Battery Output). |
| + | |
| + | |
| + | {{underline|'''Charger/Booster Status LEDs:'''}} |
| + | |
| + | The onboard <font color="blue">'''Blue LED'''</font> indicates the charge status of the Lipo battery. |
| + | * '''No battery''': LED floating (should be OFF but may flicker). |
| + | * '''Shutdown''': LED floating (should be OFF but may flicker). |
| + | * '''Charging''': <font color="blue">'''LED ON'''</font>. |
| + | * '''Fully Charged''': LED off. |
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| == Additional ressources == | | == Additional ressources == |
| * [[PowerBoost-500-Chargeur|PowerBoost 500 charger tutorial]] (''French'') | | * [[PowerBoost-500-Chargeur|PowerBoost 500 charger tutorial]] (''French'') |
− | | + | * [https://learn.sparkfun.com/tutorials/sparkfun-5v1a-lipo-chargerbooster-hookup-guide SparkFun Lipo Charger/Booster tutorial] (''English'') |
− | | |
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| {{ENG-CANSAT-PICO-TRAILER}} | | {{ENG-CANSAT-PICO-TRAILER}} |