more pcb docs

_docs/hardware_electronics.rst

@@ -1,7 +1,7 @@
 Electronics
 =============
 
-Electrical Block Diagram
+Overview
 ----------------
 
 .. figure:: /images/electronics_diagram.png
@@ -11,11 +11,8 @@ Electrical Block Diagram
 
 	PVP block diagram for main electrical components
 
-Overview
-----------------
-
 The PVP is coordinated by a Raspberry Pi 4 board, which runs the graphical user interface, administers the alarm system, monitors sensor values, and sends actuation commands to the valves.
-The core electrical system consists of two modular PCB 'hats', a sensor PCB and an actuator PCB, that stack onto the Raspberry Pi via 40-pin stackable headers (Figure \ref{fig:BOARDSTACK}).
+The core electrical system consists of two modular PCB 'hats', a sensor PCB and an actuator PCB, that stack onto the Raspberry Pi via 40-pin stackable headers.
 The modularity of this system enables individual boards to be revised or modified to adapt to component substitutions if required.
 
 .. toctree::
@@ -34,19 +31,33 @@ This power is transmitted across the PCBs through the stacked headers when requi
 Sensor PCB
 ----------------
 The sensor board interfaces four analog output sensors with the Raspberry Pi via I2C commands to a 12-bit 4-channel ADC (Adafruit ADS1015).
-1. an airway pressure sensor (Amphenol 1 PSI-D-4V-MINI)
-2. a differential pressure sensor (Amphenol 5 INCH-D2-P4V-MINI) to report the expiratory flow rate through a D-Lite spirometer
-3. an oxygen sensor (Sensiron SS-12A) whose 13 mV differential output signal is amplified 250-fold by an instrumentation amplifier (Texas Instruments INA126)
-4. a fourth auxiliary slot for an additional analog output sensor (unused)
+- an airway pressure sensor (Amphenol 1 PSI-D-4V-MINI)
+- a differential pressure sensor (Amphenol 5 INCH-D2-P4V-MINI) to report the expiratory flow rate through a D-Lite spirometer
+- an oxygen sensor (Sensiron SS-12A) whose 13 mV differential output signal is amplified 250-fold by an instrumentation amplifier (Texas Instruments INA126)
+- a fourth auxiliary slot for an additional analog output sensor (unused)
 
 A set of additional header pins allows for digital output sensors (such as the Sensiron SFM3300 flow sensor) to be interfaced with the Pi directly via I2C if desired. 
 
+.. figure:: /images/pressure_rev2_schematic_image.png
+    :align: center
+    :figwidth: 100%
+    :width: 100%
+
+	Sensor PCB schematic
+
 <ADD SCHEMATIC AND COMPONENT TABLE AND PCB FILES>
 
 Actuator PCB
 ----------------
 The purpose of the actuator board is twofold:
-1. regulate the 24V power supply to 5V (CUI Inc PDQE15-Q24-S5-D DC-DC converter)
-2. interface the Raspberry Pi with the inspiratory and expiratory valves through an array of solenoid drivers (ULN2003A Darlington transistor array)
+- regulate the 24V power supply to 5V (CUI Inc PDQE15-Q24-S5-D DC-DC converter)
+- interface the Raspberry Pi with the inspiratory and expiratory valves through an array of solenoid drivers (ULN2003A Darlington transistor array)
+
+<ADD SCHEMATIC AND COMPONENT TABLE AND PCB FILES>
+
+.. figure:: /images/actuators_rev2_schematic_image.png
+    :align: center
+    :figwidth: 100%
+    :width: 100%
 
-<ADD SCHEMATIC AND COMPONENT TABLE AND PCB FILES>
+	Actuator PCB schematic

_docs/hardware_overview.rst

@@ -9,7 +9,7 @@ Mechanical Diagram
     :figwidth: 100%
     :width: 100%
 
-    Schematic diagram of main mechanical components
+    Schematic diagram of main mechanical components <- THIS NEEDS TO BE UPDATED
 
 Flow actuators
 -------------------    
@@ -25,15 +25,7 @@ Sensors
 - Expiratory pressure sensor (PS2)
 - Expiratory flow sensor (FS1)
 
-Safety Components
--------------------
-- 50 psi, high pressure relief valve (PRV1)
-- Safety check valve (CV)
-- 70 cmH2O patient-side pressure relief valve (PRV2)
-- Filters (F1, F2)
-- PEEP valve (PEEP) (include the design bifurcation in this module description)
-
-Bill of Materials (need to think about what goes in this table, probably separate BoMs into tables by category, but here's a sample table)
+Bill of Materials
 -------------------
 
 .. list-table::