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Medical-Robotics-Limbo / Electrical

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Power Management System #4

Open P7R7M opened 1 year ago

P7R7M commented 1 year ago

https://learn.sparkfun.com/tutorials/power-delivery-board---usb-c-qwiic-hookup-guide/all

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Useful links on USB-C Power Delivery (PD): https://www.youtube.com/watch?v=OwAZqJ4wpJg

Buck vs LDO Regulator: https://www.youtube.com/watch?v=giGRrODKJSE&t=139s GOAL: feed 8.4V and get out 5V and 3.3V (for now)

https://docs.google.com/document/d/1gVOqEcoC50Bx6NVB0qYACGVpzWjTPaRM8ukTt0245ng/edit?usp=sharing

P7R7M commented 1 year ago

Trying to start by modifying google sheets in google drive to calculate battery needed and length of life, mechanical says they need 6 motors and 3 servos

https://docs.google.com/spreadsheets/d/1vdfAW6xmzHYmbdyU1Ku4hGwFS9T7ds_eAlnK-V6DiFA/edit?usp=sharing

P7R7M commented 1 year ago

rough space specs, def over, are 60mm diameter by 120 mm depth

P7R7M commented 1 year ago

Image

P7R7M commented 1 year ago

biggest rectangle battery that can fit is 42x42x120 mm

look into other types of batteries like lifepos

P7R7M commented 1 year ago

decided on this battery for now: https://www.amazon.com/3000mAh-Battery-WLTOYS-Upgrade-Charger/dp/B0887TLWWB/ref=asc_df_B0887TLWWB/?tag=hyprod-20&linkCode=df0&hvadid=475772725632&hvpos=&hvnetw=g&hvrand=11555683523190682289&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1015254&hvtargid=pla-1144675493427&psc=1, going to add to purchasing sheet

P7R7M commented 1 year ago

exploring this as a buck converter option, gonna focus on the conversion side before the chargin side for priority of a working prototype: https://www.digikey.com/en/products/detail/texas-instruments/TPSM84203EAB/7561619?utm_adgroup=Texas%20Instruments&utm_source=google&utm_medium=cpc&utm_campaign=PMax%20Shopping_Supplier_Texas%20Instruments&utm_term=&utm_content=Texas%20Instruments&gclid=CjwKCAiAu5agBhBzEiwAdiR5tLjvhSbuddLsKxWdufY2yPBvYlPLwKL3zgokFA7bn1L80aDD2xRDVRoCH1QQAvD_BwE

P7R7M commented 1 year ago

a SUPER cool battery: https://www.i-biomed.com/flexcell.html

spoma3 commented 1 year ago

Buck Converter Stats.xlsx

P7R7M commented 1 year ago

We should take 5V linear regulators from the HIVE (REG_5V_LDL1117S50R) and use that to convert the LiPo voltage to 5V to power the microcontroller.

Considering this for usbc power source: https://www.amazon.com/Type-C-Trigger-Module-Supports-Output/dp/B08LDJBN8P?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=A1W3E55295CO65&th=1, and then https://www.dfrobot.com/product-1713.html to use that power to properly charge the LiPo battery

depending on the amount of load and current draw, we can most likely use the microcontrollers built in 3.3v regulator for anything else that needs it