create Mobile Power Station Charger (#613)

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* Rename battery-bus.pdf to schematic.pdf

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projects/mobile_power_station_charger/README.md

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+---
+name: "Jakub Kokoszkiewicz"
+slack_handle: "@darth_taco"
+github_handle: "@darth-taco-tmp"
+tutorial: none
+---
+
+# mobile power station charger
+
+Goal of this pcb is to charge and log data of charging and discharging connected battery modules.
+This board contains 160W charger that will be able to charge our battery from USB C up to 100W or from DC barrel jack up to 160W which voltage from 9V to 60V.
+There is also a ESP32 microcontroller that will connect to our phone to provide precise data about charging and discharging from all connectors.
+It also has connectors for various modules that will provide power in different ways, such as standard and fast USB ports, ports with regulated voltage and more.
+
+~~Cost of this board is 99.17$ for 5 pcb's, 2 assembled. I removed some easy to solder components to fit in 100$ grant.~~
+~~But this is price in the cart, so with shipping and customs it will be more expensive (137.92$) so I will need to donate to onboard this additional 37.92$.~~
+Cost of this board is 66.65$ for 5 pcb's, 2 assembled. I removed more components to fit with together with shipping and customs in 100$ grant.
+So now final price is 97.52$.
+
+Datasheets of various components is the best help in design process :)