Add hardware, reorganize repo

Author: shanemmattner

Data-Logger-PCB/Hardware.md

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+# Hardware
+
+This document is for the hardware portion of the project.
+
+## Hardware Design Log
+1. Import ESP32-C3-Mini-1 symbol and footprint from [Espressif KiCad Library](https://github.com/espressif/kicad-libraries)
+2. Place `ESP32-CE-Mini-1` module with decoupling/bulking caps
+3. Create `enable` circuit for ESP32C3
+4. Create programming circuit for ESP32C3
+    - Only need `USB D+/D-` pins `18/19` to program the ESP32-C3 because it has a `integrated USB Serial/JTAG Controller`, see [doc](https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/api-guides/usb-serial-jtag-console.html)
+    - [USB C plug vs recepticle](https://www.arrow.com/en/research-and-events/articles/usb-technology-c-plug-and-receptacle-pinouts)
+5. Add power circuits
+    - Linear LDO will do for the first version
+    - Need `0.5A` max
+    - Add [PMOS reverse polarity protection circuit](https://components101.com/articles/design-guide-pmos-mosfet-for-reverse-voltage-polarity-protection)
+6. ADC circuit
+    - Op-amp voltage follower
+    - 5 voltage ranges monitored:
+        - 2 x `3.3v`
+        - 1 x `5v`
+        - 1 x `12v`
+        - 1 x `24v`
+7. uSD card circuit
+    - [pull-ups for all unused pins](https://electronics.stackexchange.com/questions/39571/how-to-do-pulling-up-or-down-correctly-when-interfacing-a-microsd-card)
+
+
+## Convert EasyEDA footprints to KiCAD
+JLCPCB is the cheapest board house including assembly.  But you have to use their specific [parts library](https://jlcpcb.com/parts). To easily get footprints for parts you can:
+1. Open the footprint in EasyEDA
+2. `File` > `Export` > `EasyEDA`
+3. Insteall [lc2kicad](https://github.com/RigoLigoRLC/LC2KiCad)
+4. Alias the command so it's easier to user
+```bash
+alias lc2kicad="${Path_to_repo}/submodules/lc2kicad/build/lc2kicad"
+```
+5. Convert `EasyEDA` footprint to KiCAD
+```bash
+lc2kicad ~/Downloads/PCB_NEW_PCB_2022-12-04.json
+```
+6. Open footprint in KiCAD
+7. Create new footprint in KiCAD and copy/paste part
+
+https://jlcpcb.com/parts
+
+## TODO
+- Page Documentation
+- Circuit documenations
+- spec specific passives
+
+## Circuits
+- ESP32-C3
+    - Power bulk cap
+    - Power decoupling cap
+    - `Enable` circuit
+        - `RC` circuit
+    - Programming circuit
+
+## Notes
+- Use relative path libraries in KiCAD
+- Make sure all data sheets are saved
+- Add thermistor circuits
+- Add I2C power bus reset circuit
+- Add decoupling caps near USB trace switching planes
+    - [info](https://electronics.stackexchange.com/questions/141264/can-differential-usb-traces-be-routed-relative-to-power-not-ground-planes)

Data-Logger-PCB/data_logger_esp32c3/data_logger_esp32c3-backups/data_logger_esp32c3-2023-01-07_185947.zip

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+"Id";"Designator";"Package";"Quantity";"Designation";"Supplier and ref";
+1;"U5,U4,U8,U6,U7";"LM321MF";5;"LM321MF";;;
+2;"IO13,DC-1,DC+1,IO11,IO5,VIN1,IO15,A2N1,A3N1,SDA1,TX0,IO0,IO1,A0N1,3V3,IO6,IO3,A3P1,A4P1,RX0,A4N1,IO10,I2SN1,I2SP1,NRESET1,SCL1,IO9,A0P1,IO8,IO2,IO4,A2P1,IO14,NINT1,IO7,IO12";"TestPoint_THTPad_1.0x1.0mm_Drill0.5mm";36;"TestPoint";;;
+3;"R4,R1,R15,R3,R14,R9";"R_0402_1005Metric";6;"10k";;;
+4;"C1";"C_0402_1005Metric";1;"1uF";;;
+5;"R2,R7";"R_0402_1005Metric";2;"5.1k";;;
+6;"C2,C5,C4";"C_0603_1608Metric";3;"10uF";;;
+7;"SD1";"472192001";1;"472192001";;;
+8;"R12";"R_0402_1005Metric";1;"7.5k";;;
+9;"R18,R17";"R_0402_1005Metric";2;"30.1";;;
+10;"R6,R5,R13";"R_0402_1005Metric";3;"1k";;;
+11;"R16,R8";"R_0402_1005Metric";2;"4.7k";;;
+12;"U1";"ESP32-C3-MINI-1";1;"ESP32-C3-MINI-1";;;
+13;"R11";"R_0402_1005Metric";1;"3.92k";;;
+14;"R10";"R_0402_1005Metric";1;"1.6k";;;
+15;"U9,U10";"SOT-23";2;"A03401A";;;
+16;"D1";"DFN1610";1;"LTVS16H5.0T5G";;;
+17;"U2";"SOT-223-4";1;"AZ1117IH-3.3TRG1";;;
+18;"U11";"QFN-28-EP(4x4)";1;"SX1509BIULTRT";;;
+19;"C3,C7,C6";"C_0402_1005Metric";3;"0.1uF";;;
+20;"USB-C1";"USB-TYPE-C-018";1;"USB-TYPE-C-018";;;