Feat[shield]: add shield description

Author: xamuil2

pages/elec/boards/_meta.json

@@ -1,7 +1,9 @@
 {
-    "carrier": "",
-    "esc": "ESC",
-    "esc_carrier": "ESC Carrier",
+    "cm4_carrier": "CM4 Carrier",
     "power": "Power",
+    "shield": "Shield",
+    "minifoc": "MinifocESC",
+    "anyesc": "AnyESC",
+    "anyesc_carrier": "AnyESC Carrier",
     "networking": "Networking"
 }

pages/elec/boards/esc.md renamed to pages/elec/boards/anyesc.md

@@ -0,0 +1,57 @@
+# Power Board
+
+## Outline
+
+![Raytraced Render](/img/minifoc_v1_release.png)
+
+The MUREX ROV Shield
+
+## Detailed Description
+
+The MUREX Power Board is a compact four-layer power "integration" PCB designed for ROV/robotics and other high current applications. The board expects clean 12V input from a power supply through a horizontal Mega-fit connector, though it can safely handle input voltages up to 17V. The board utilizes two TPS568230 buck converters to provide 5V + 3.3V for the [MUREX Carrier Board](https://docs.murexrobotics.com/elec/boards/cm4_carrier.html), 3.3V for the [MUREX Ethernet Switch](https://docs.murexrobotics.com/elec/boards/networking/switch), and 12V + 3.3V for the [ESC Carrier Board](https://docs.murexrobotics.com/elec/boards/anyesc_carrier.html). A LTC4352 Ideal Diode Controller controls back-to-back SIRA00DP N-channel MOSFETs to provide reverse polarity protection, shorting safeguards, inrush current control, overvoltage and undervoltage protection, and status LEDs that indicate safe power input. Power monitoring is provided by Texas Instruments' INA226, a shunt-based power monitor interfaced through I2C, sensing current, voltage, and power.
+
+## Current Status
+
+- `V1.0` tested and functional at 300W
+
+## Integrated Sensors and ICs
+
+- [TPS568230 x2](https://www.ti.com/product/TPS568230?dcmp=dsproject&hqs=pf) Synchronous Buck Converter
+- [LTC4352](https://www.analog.com/en/products/ltc4352.html) Analog Devices Ideal Diode Controller
+- [SIRA00DP x2](https://www.vishay.com/en/product/63780/) 30V 100A N-Channel Mosfet
+- [INA226](https://www.ti.com/product/INA226) Current, Voltage, Power Monitor
+
+- [TPS568215 x2 (retired in V2.0)](https://www.ti.com/product/TPS568215?dcmp=dsproject&hqs=pf) Buck Converter
+- [ACS712 (retired in V1.1)](https://www.allegromicro.com/en/products/sense/current-sensor-ics/zero-to-fifty-amp-integrated-conductor-sensor-ics/acs712) Current Sensor IC
+
+
+### [Schematic (PDF)](/pdf/schematics/power_v2.0_schematic.pdf)
+
+![Schematic Preview](/img/power_board_schematic_preview.png)
+
+### To Do
+
+### Changelog
+
+V1.0:
+
+- Initial Design
+
+V1.1:
+
+- Removed M.2 connector to Carrier Board (Board Thickness > 0.8mm)
+- Removed ACS712 Hall-Effect Sensor to save cost and board space
+- Added AGND islands to reduce circulating currents
+- Broke out INA226 I2C pins
+- Switched 12VIN connector from Super Sabre to Mega-fit
+- Fixed Si7336ADP polarity
+
+V2.0:
+
+- Replaced TPS562815 with the TPS562830, a newer, smaller, more efficient alternative by TI
+- Added inrush current control, undervoltage, and overvoltage protection configurations to the LTC4352 using back-to-back mosfets
+- Added TVS diode for surge protection
+- Replaced the Si7336ADP with the SIRA00DP, a newer solution by Vishay with lower Rds, minimal thermal resistance and higher power dissipation. No external heatsinks required
+- Replaced 1x2 screw terminal with 1x3 terminal, breaking out 5V and 3.3V
+- Added two mounting holes for stability
+- Decreased physical footprint by 20%

pages/elec/boards/esc_carrier.md renamed to pages/elec/boards/anyesc_carrier.md

@@ -1,5 +1,5 @@
 {
     "networking": "Networking",
-    "switch": "Ethernet Switch",
+    "switch": "MrxSwitch",
     "plc": "PLC Module"
 }

pages/elec/boards/carrier.md renamed to pages/elec/boards/cm4_carrier.md

@@ -0,0 +1,39 @@
+# MrxShield
+
+## Outline
+
+![Raytraced Render](/img/shield_v1_release.png)
+
+The MUREX Shield is the world's first open-source modular power protection board designed for ROVs and other high current applications. A hotswappable controller hat and power panel provide exceptional thermal dissipation, space-efficency, and easy replacement.
+
+## Detailed Description
+
+The MUREX Shield is an ultra-compact and modular "two-piece" power protection system designed for ROVs/robotics and other high current applications. The shield is currently tested to handle 300W (12V @25A linear) safely. A custom LM7481 Ideal Diode Controller hat attaches onto the main power panel, which hosts back-to-back IRFB3077PbF N-channel MOSFETs and TVS diodes to provide transient protection, reverse polarity protection, shorting safeguards, inrush current control, and undervoltage and overvoltage protection. Jumpers on the LM7481 hat provide multiple configurations for UVLO+OVLO, ranging from 6V to 18V. Status LEDs on the hat and power panel indicate safe power input. 
+
+## Current Status
+
+- `V1.0` tested with parallel electronic loads, functional at 300W
+
+## Integrated Sensors and ICs
+
+- [LM7481](https://www.ti.com/product/LM7481) NFET Ideal Diode Controller
+- [IRFB3077PbF](https://www.infineon.com/dgdl/irfb3077pbf.pdf?fileId=5546d462533600a4015356153f0d1def) Infineon Linear FETs
+
+
+### [Schematic (PDF)](/pdf/schematics/shield_v1.0_schematic.pdf)
+
+![Schematic Preview](/img/shield_schematic_preview.png)
+
+### To Do
+
+- Alternative power mosfet selections (higher efficiency, cost, accessibility)
+- GANFETs 
+- Improved board-to-wire connection for thicker wire gauges
+- Enhanced thermal dissipation
+- Inductive load testing
+
+### Changelog
+
+V1.0:
+
+- Initial Design