.gitignore

@@ -1,5 +1,6 @@
 #temporary
 datasheets/
+pi-interface-board_v1.0/export/
 export/
 pcb2gcode/
 cad/import
@@ -9,12 +10,10 @@ cad/import
 \#auto_saved_files\#
 *.lck
 _autosave-*
-fp-info-cache
 
 *.kicad_sch-back
 *.bak
 *.kicad_sch-bak
-*.kicad_prl
 
 #drawio
 *.bkp

README.md

@@ -1,197 +1,149 @@
-# Raspberry Pi Extension board
+A Raspberry Pi-compatible PCB that extends the GPIO header with protected I/O, relays, and various features for versatile use in prototyping and project development.
-
-A custom PLC-like system based on the Raspberry Pi.  
-With a custom interface board, a Raspberry Pi is extended with protected I/O, bus systems, analog inputs, and Relay or PWM outputs. All components, including a display, are housed in a custom-designed enclosure.  
-  
-The project is intended for versatile use in prototyping and project development.
-
-
 ---
 
+# Notes
 
-### Photo of all hardware components
+## interface-board issues noticed when soldering
-<p align="center">
+- [x] digital in TVS diode footprint: dia is larger -> rotate one/space + 1.5mm drill
-  <img src="doc/photos/all-components.jpg" alt="All Components (Disassembled)" width="75%"/>
+- [x] make diodes pwm larger hole
-</p>
+- [x] make pitch buzzer larger
+- 
+
+## interface-board issues at first test
+- analog leds vs terminal: CH0 and CH1 swapped (first, second terminal)
+-> renamed nets and added notes 
+- analog leds vs terminal: CH2 and CH3 swapped (third fourth terminal)
+- 
+- CH1 and CH7 led on
 
 
----
+## Power supply board 
+FIXME: barrel-connector wrong polarity 
+-> change housing (connected via wires)
+-> fix layout, schematic
 
 
-# Repository Content
+
-- **KiCad Projects**: 3 KiCad projects with schematics and PCB layouts for the custom PCBs created.
+# RPI Specs (Zero, 3+)
-- **Housing**: Custom enclosure design for PCBs and Raspberry Pi created in FreeCAD.
+- Available (old) Pi: Raspberry Pi 2 Model B v1.1 
-- **Software/Firmware**: Python scripts for operating and testing the PCB features (WIP).
+- GPIO
+  - Low: 0.9V
+  - High: 1.6V
+  - Input current: 5uA
+  - Input capacitance: 5pF
+  - Output Current +-17mA
+  - Pullup / Pulldown 50-65k
+- EEPROM GPIO0 GPIO1, leave unused
 
 
----
+
+# Feature Ideas
+- [x] Temperature control
+  - fan
+    - auto turn on
+      - temp sensor
+    - ~~turn on via gpio~~
 
 
-# Features Overview
+## Supply
-This project provides:
+- Input protection
-- Protected GPIO I/O for Raspberry Pi.
+  - [x] TVS
-- Various analog inputs.
+  - [x] reverse polarity (polyfuse will trigger)
-- Flexible power supply options (3.3 V, 5 V, -5 V, 12 V, 24 V outputs).
+  - [x] Fuse (5A polyfuse)
-- Relay and MOSFET control.
+  - [x] buffer
-- Integrated LEDs for status indication.
+- [x] Pass through power supply
-- RS485, I2C, SPI, and UART bus communication.
+- [x] 3.3V, 5V, 12V, 24V Regulator
 
-Detailed features of each PCB are described in the respective sections below.
+- [x] power by barrel connector (24V 5A)
-
+- ~~power by usb~~ [not allowed]
----
+  - ~~Switch between power by USB or power supply?~~
-
+- ~~power by battery~~ [dropped]
-# Designed PCBs
+  - liion cell connector
-
+  - BMS / charge controller
-## 1. **Raspberry Pi Interface Board**
+  - measure battery voltage
-This board connects to the Raspberry Pi via a 40-pin ribbon cable and provides protected GPIO extensions and versatile input/output features.
+  - USB charging port
-
-### Photo
-<img src="doc/photos/rpi-interface-board.jpg" alt="Raspberry Pi Interface Board" width="80%"/>
-
-### Features
-**Inputs**:
-- **8x Digital Inputs**:
-  - Wide continuous voltage range (-1.7 V to 120 V), idea: compatible with 3 V and 24 V devices.
-  - TVS diodes for ESD and spike protection.
-  - Reverse polarity protection.
-  - Isolated with optocouplers.
-  - Optional low-pass filters (toggle via DIP switches).
-
-- **8x Analog Inputs**:
-  - Different fixed range inputs:
-    - 2x 0 - 3.3 V.
-    - 2x 0 - 5 V.
-    - 1x 0 - 12 V.
-    - 1x 0 - 24 V.
-    - 2x 0 - 20 mA.
-  - Overvoltage protection with clamping diodes.
-  - Optional low-pass filters (toggle via DIP switches).
-
-**Outputs**:
-- 1x onboard buzzer.
-- 2x 16 A relays.
-- 2x high-power MOSFETs (N-channel, max 55 V, 33 A continuous, 160 A pulsed).
-- 8x digital outputs (via shift register):
-  - Low-power (30 mA push-pull) and high-power (500 mA open-drain) outputs.
-  - Buzzer and relays connected to channels 6-8, with enable/disable switches.
-  - Note: Outputs are **not short-circuit proof**.
-
-**General**:
-- WAGO spring-loaded terminals for easy wiring.
-- JST connectors for external LEDs for all inputs and outputs to indicate the current pin state.
-
-**Bus Communication**:
-- RS485 (TVS protection, idle pull-up/pull-down, 120 Ω terminator).
-- UART (unprotected).
-- I2C (TVS diodes, 2.2 kΩ pull-ups).
-- SPI (unprotected).
-Note: Either RS485 or UART can be used at the same time (select with jumpers).
-
-### Schematic and Layout
-<p align="center">
-  <a href="pi-interface-board_v1.0/export/schematic_interface-board.pdf">
-    <img src="pi-interface-board_v1.0/export/schematic_interface-board.svg" width="49%" alt="Schematic"/>
-  </a>
-  <img src="pi-interface-board_v1.0/export/layout_interface-board.png" width="49%" alt="PCB Layout"/>
-</p>
 
 
----
+## IO
+- Input
+  - GPIO
+  - [x] wide voltage range (-1.7 to 120V)
+  - [x] TVS
+  - [x] reverse polarity (-1.73V max)
+  - [x] Low pass filter
+  - [x] Optocoupler input
+  - [x] ADC
+    - external IC
+    - ~~multiplexer?~~
+    - protection
+    - scale input voltage
+      - fixed inputs: 24V 12V 5V 3.3V
+      - 20mA input
+      - ~~trim potentiometer?~~
+- Output
+  - [x] Relay
+  - [x] Mosfet
+  - [x] Optocoupler output
+  - [ ] GPIO with over current protection
+  - [ ] GPIO level shift (24V output)
+  - [x] PWM pins
+  - [x] shift register
+  - [ ] DAC
+
+- [x] LEDS indicate I/O state
+- [ ] Testpoints
+- [x] ESD protection (tvs diodes uart, i2c...)
 
 
-## 2. **Power Supply Board**
+## Bus
-Creates different voltages from supplied 24 V. Supply for the Raspberry Pi interface board as well as several terminals for variable use (connect sensors, devices, etc., to the housing).
+- [x] UART/RS485
-
+- [ ] RS232 Connector
-### Photo
+- [x] I2C Pullup
-<img src="doc/photos/power-supply-board.jpg" alt="Power Supply Board" width="60%"/>
+- [x] SPI
-
+- [ ] CAN
-### Features
+- ~~Serial to usb (if Arduino)~~
-**Input**:
+- ~~OWB default GPIO4~~
-- 24 V 5 A barrel plug.
-- 5 A self-resetting polyfuse.
-- Reverse polarity protection.
-
-**Output**:
-- 3.3 V, 3 A (buck converter).
-- 5 V, 5 A (buck converter).
-- -5 V, 20 mA (charge pump).
-- 12 V, 3 A (buck converter).
-- 24 V (supply voltage filtered).
-
-**Fan Control**:
-- 2x connector for 10 kΩ NTC.
-- Threshold adjustable (trimmer potentiometer).
-- Hysteresis adjustable (trimmer potentiometer).
-- Select between 5 V or 12 V fan.
-
-**General**:
-- Spring-loaded terminals for each voltage.
-- Combined internal terminals for all voltages.
-
-### Schematic and Layout
-<p align="center">
-  <a href="power-supply-board_v1.0/export/schematic_power-supply.pdf">
-    <img src="power-supply-board_v1.0/export/schematic_power-supply.svg" width="55%" alt="Schematic"/>
-  </a>
-  <img src="power-supply-board_v1.0/export/layout_power-supply.png" width="44%" alt="PCB Layout"/>
-</p>
-
----
-
-## 3. **LED Boards**
-Small PCBs with LEDs, resistors, and mounting holes for housing indicators.
-
-### Photo
-<img src="doc/photos/led-boards.jpg" alt="LED Boards" width="60%"/>
-
-### Boards
-1. 2x 5 mm LEDs for relays.
-2. 2x 5 mm LEDs for PWM outputs.
-3. 8x 3 mm yellow LEDs for analog inputs.
-4. 8x 3 mm orange LEDs for digital inputs.
-5. 8x 3 mm red LEDs for digital outputs.
-
-### Schematic and Layout
-<p align="center">
-  <a href="led-boards_v0.1/export/schematic_led-boards.pdf">
-    <img src="led-boards_v0.1/export/schematic_led-boards.svg" width="48%" alt="Schematic"/>
-  </a>
-  <img src="led-boards_v0.1/export/layout_led-boards.png" width="51%" alt="PCB Layout"/>
-</p>
 
 
----
+## UI
+- Input [dropped]
+  - Buttons
+  - DIP switches?
+  - Temperature sensor
+  - Encoder
+  - Potentiometer
+- Output
+  - [ ] Display [RPI display pending]
+  - [x] Buzzer
+  - [x] LEDS
 
 
-# Software/Firmware
+## Mechanical
-Python code for operating the extension PCBs (e.g., GPIO pins, shift registers, ADC, and bus communication). This section is a work in progress (WIP), and example scripts will be added as development continues.
+- [x] Barrel plug (24V 3A supply)
+- ~~Screw terminals~~
+- [x] spring loaded?
+- ~~pass through all pins?~~
+
+## Housing
+- RPI ports
+-  banana sockets for power out 
+-  screw terminal exposed
+- buttons, leds: need to open up?
+-  BNC? []
 
 
----
+## Other
+- Extension board with multiplexer
+- Breadboard compatible?
+- SD Card
+- ~~Onboard MCU for standalone use?~~
+- ~~separate bought MCU via i2c  for additional GPIO, DAC, ADC in one~~
 
 
-# Housing
+## Questions
-Custom-designed enclosure includes:
+- what analog input ranges (Voltage, Count)
-- Ports for Raspberry Pi.
+- RS232  RS485  SPI,  IIC  actually necessary? examples
-- Banana sockets for power outputs.
+- CAN to second SPI?
-- Exposed screw terminals.
+- 8x shift register outputs, 0.5A open drain or 7mA tristate
-- Openings for buttons and LEDs.
+- 2x PWM 30A enough?
-- Mounts for all PCBs and wiring.
+- max used PWM freq? (drop opto if >80khz)
-
-<img src="doc/graphics/3d-model_housing.png" width="80%" alt="3D Model"/>
-
-
----
-
-
-# Dropped Features
-The following ideas were considered but not implemented:
-- UI Input Elements:
-  - Buttons, DIP switches, temperature sensors, encoders, or potentiometers.
-- USB or battery-powered operation:
-  - Battery packs with BMS and voltage measurement.
-  - Li-ion cell holders.
-- Analog output (DAC)
-- More bus systems
-  - RS232 Interface
-  - CAN Interface

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-		(layer "Cmts.User")
-		(uuid "386bf708-dd36-4dcd-9ac2-0aa153c758fc")
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-			(font
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-		(at 160.05 24.9 0)
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 	(gr_text "CH1, CH0, CH3, CH2, CH5, CH4, CH7, CH6"
 		(at 71.7691 140.670811 0)
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@@ -57833,21 +57764,8 @@
 			(justify left bottom)
 		)
 	)
-	(gr_text "5V, -5V, 3V3, GND"
+	(gr_text "Notes Analog led connector:\nconnector order does not \nmatch terminal order\n-> see Net names for mapping \n     T1 = terminal pin 1"
-		(at 65.75 97.125 90)
+		(at 21.7311 88.854811 0)
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-	(gr_text "Note Analog led connector:\nconnector order does not \nmatch terminal order\n-> see Net names for mapping \n     T1 = terminal pin 1"
-		(at 72.55 163.6 0)
 		(layer "Cmts.User")
 		(uuid "876718fc-16e2-48db-9246-164e057e8a52")
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+	(gr_text "Note Diodes digital input:\n Validate CCD diode direction\n Label differs (Anode Cathode swapped)"
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+		(at 119.5211 155.656811 0)
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-	(gr_text "Note Diodes digital input:\n Validate CCD diode direction\n Label differs for CCD Diodes\n refer Datasheet (Anode Cathode swapped)"
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 		(uuid "9b206df4-3430-4b4d-8344-cb35122dc522")
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-		)
-	)
 	(gr_text "TODO:\n - spi terminal, traces on top as well"
-		(at 19.5 18.95 0)
+		(at 234.442 20.32 0)
 		(layer "Cmts.User")
 		(uuid "b0731196-9468-4af8-9d9e-e9be8f2bde8b")
 		(effects
@@ -57924,84 +57803,6 @@
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-		(at 169.425 93.25 0)
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-	(gr_text "Shift-Register CH6"
-		(at 240.1 123.85 90)
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-	)
-	(gr_text "GPIO: GND, 3V3, 19,    21,   20,   7"
-		(at 70.85 22.95 0)
-		(layer "Cmts.User")
-		(uuid "fd32d4a4-1695-4505-8153-dd317366d575")
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-	(gr_text "GPIO-25, GPIO-16, GPIO-26, GPIO-13, GPIO-6, GPI-5, GPIO-22, GPIO-24"
-		(at 118.35 142.15 0)
-		(layer "Cmts.User")
-		(uuid "ff58db0e-8ae8-44c2-ad58-30ba922ec2e9")
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 	(gr_text "Raspberry PI"
 		(at -69.765 64.662 0)
 		(layer "User.9")
@@ -58018,15 +57819,15 @@
 	(dimension
 		(type aligned)
 		(layer "User.4")
-		(uuid "954a18dc-7947-48ba-98e7-91459ecdd8c4")
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-			(xy 68.12315 31.779111) (xy 68.12315 134.446111)
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 		)
-		(height 7.629049)
+		(height -10.64)
-		(gr_text "102.6670 mm"
+		(gr_text "20.3200 mm"
-			(at 59.344101 83.112611 90)
+			(at 243.5931 51.290811 90)
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+			(at 246.7935 109.901311 90)
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 		(gr_text "162.0320 mm"
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pi-interface-board_v1.0/pi-interface-board_v1.0.kicad_prl

@@ -0,0 +1,81 @@
+{
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+    "active_layer_preset": "",
+    "auto_track_width": false,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.7099999785423279
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+      "footprints": false,
+      "graphics": false,
+      "keepouts": false,
+      "lockedItems": false,
+      "otherItems": false,
+      "pads": false,
+      "text": false,
+      "tracks": true,
+      "vias": false,
+      "zones": false
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+    ],
+    "visible_layers": "fff7fff_ffffffff",
+    "zone_display_mode": 0
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+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "pi-interface-board_v1.0.kicad_prl",
+    "version": 3
+  },
+  "project": {
+    "files": []
+  }
+}

power-supply-board_v1.0/power-supply-board_v1.0.kicad_pcb

@@ -4915,7 +4915,7 @@
 			)
 		)
 		(property "Value" "Fan"
-			(at 0.889962 7.9 -90)
+			(at 1.009962 6.24 180)
 			(layer "F.Fab")
 			(uuid "4d4df2c7-768a-440f-b24d-257e61a23141")
 			(effects
@@ -5362,7 +5362,7 @@
 			)
 		)
 		(property "Value" "TP 5V"
-			(at -5.374 0.205 0)
+			(at -4.4196 0.1016 0)
 			(layer "F.Fab")
 			(uuid "a0c561cd-f07b-449b-bdd1-95638dd33795")
 			(effects
@@ -6504,7 +6504,7 @@
 			)
 		)
 		(property "Value" "TP GND"
-			(at -5.674 -0.009 0)
+			(at 0 2.33 0)
 			(layer "F.Fab")
 			(uuid "f731c7b1-c8fe-4e90-ac69-cb625c88948a")
 			(effects
@@ -7243,7 +7243,7 @@
 			)
 		)
 		(property "Value" "TP TEMP"
-			(at 9.528 -0.432 0)
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 			(layer "F.Fab")
 			(uuid "ed3680c0-c9ba-4169-a084-10cfa6173f52")
 			(effects
@@ -10050,7 +10050,7 @@
 			)
 		)
 		(property "Value" "TP BATT"
-			(at -6.84 0.174 0)
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 			(layer "F.Fab")
 			(uuid "5f62316e-74b6-43ed-bb58-25015d3a0537")
 			(effects
@@ -10306,7 +10306,7 @@
 			)
 		)
 		(property "Value" "2200uf"
-			(at -0.952 2.579362 0)
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 			(layer "F.Fab")
 			(uuid "1f7d7bb5-f802-471e-8ae7-4e1a80563b95")
 			(effects
@@ -15778,7 +15778,7 @@
 			)
 		)
 		(property "Value" "low power supply"
-			(at 5.304 -17.46 -90)
+			(at 5 4.6 90)
 			(layer "F.Fab")
 			(uuid "1d2b2d9a-85f8-4869-9ad4-78ea70baaaa5")
 			(effects
@@ -16269,7 +16269,7 @@
 			)
 		)
 		(property "Value" "24V 6A Supply"
-			(at -15.187 0.642 90)
+			(at -19.9136 1.2954 0)
 			(layer "F.Fab")
 			(uuid "b5278e3f-7951-4c56-8683-37a8cd2cebf3")
 			(effects
@@ -20435,7 +20435,7 @@
 			)
 		)
 		(property "Value" "high power supply"
-			(at 5.165 -6.037 0)
+			(at 5.1206 -3.456 0)
 			(layer "F.Fab")
 			(uuid "d9ee3520-6870-4f5a-8c4c-ed027f9844b0")
 			(effects
@@ -20835,7 +20835,7 @@
 			)
 		)
 		(property "Value" "high power supply"
-			(at 5.115 -21.832 0)
+			(at 5.5778 -3.5068 0)
 			(layer "F.Fab")
 			(uuid "7e1d6e39-ec62-4779-b99d-5474369325c0")
 			(effects
@@ -24017,7 +24017,7 @@
 			)
 		)
 		(property "Value" "TS-NTC-103 10k"
-			(at 1.215 -11.968 0)
+			(at 2.1444 -11.9634 0)
 			(layer "F.Fab")
 			(uuid "b5f74fe3-90ad-4c5b-8181-6c82cc7709ee")
 			(effects
@@ -24808,7 +24808,7 @@
 			)
 		)
 		(property "Value" "TP fan"
-			(at 8.907 -0.499 0)
+			(at 8.636 0 0)
 			(layer "F.Fab")
 			(uuid "66939a73-4b2f-47c9-b473-948dee2ca964")
 			(effects
@@ -31280,7 +31280,7 @@
 			)
 		)
 		(property "Value" "supply nopop"
-			(at 1.571038 11.0415 90)
+			(at 1.761438 15.3135 0)
 			(unlocked yes)
 			(layer "F.Fab")
 			(uuid "e46b6e15-9716-430d-b064-c043b6a581e4")
@@ -33614,7 +33614,7 @@
 			)
 		)
 		(property "Value" "TS-NTC-103 10k"
-			(at 1.234 -12.068 180)
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 			(layer "F.Fab")
 			(uuid "e646e6c0-b3cf-4c3c-86ed-e6c7826a5762")
 			(effects
@@ -38546,7 +38546,7 @@
 			)
 		)
 		(property "Value" "5A polyfuse"
-			(at 6.3952 -0.3016 0)
+			(at 5.6896 -0.5588 0)
 			(layer "F.Fab")
 			(uuid "3d2a814d-7d8a-4c99-959b-f1990d4d82c3")
 			(effects
@@ -43261,27 +43261,14 @@
 			(justify left bottom)
 		)
 	)
-	(gr_text "5V/12V Drain\n"
+	(gr_text "FIXME: Power supply barrel connector wrong polarity -> reroute"
-		(at 183.9 109.025 90)
+		(at 86.98 129.76 -0)
-		(layer "B.Cu")
+		(layer "F.Cu")
-		(uuid "822cfa54-4e7d-4926-a61c-a59f69039109")
+		(uuid "d06dcb3d-61f7-46b5-ab9d-a35c29a9f224")
 		(effects
 			(font
-				(size 1 1)
+				(size 1.5 1.5)
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-				(bold yes)
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-			(justify left bottom)
-		)
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-	(gr_text "12V, 5V, 3V3, GND"
-		(at 126.625 29.55 0)
-		(layer "Cmts.User")
-		(uuid "0768b060-fa5a-44d8-8fb6-510f71d7a46c")
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-	(gr_text "GND, 3V3, -5V, 5V, GND"
-		(at 184.2 53.2 90)
-		(layer "Cmts.User")
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-		)
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-	(gr_text "FIXME: Power supply barrel connector wrong polarity -> reroute"
-		(at 94.05 133.4 0)
-		(layer "Cmts.User")
-		(uuid "d06dcb3d-61f7-46b5-ab9d-a35c29a9f224")
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 	(gr_text "Solder on Top side as well"
 		(at 195.4022 53.1368 0)
 		(layer "Cmts.User")

power-supply-board_v1.0/power-supply-board_v1.0.kicad_prl

@@ -0,0 +1,82 @@
+{
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+    "auto_track_width": false,
+    "hidden_netclasses": [],
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+    "net_color_mode": 1,
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+      "pads": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.4000000059604645
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+    "selection_filter": {
+      "dimensions": false,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": false,
+      "lockedItems": false,
+      "otherItems": false,
+      "pads": false,
+      "text": true,
+      "tracks": true,
+      "vias": false,
+      "zones": false
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+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40
+    ],
+    "visible_layers": "48352a0_80000001",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "power-supply-board_v1.0.kicad_prl",
+    "version": 3
+  },
+  "project": {
+    "files": []
+  }
+}

power-supply-board_v1.0/power-supply-board_v1.0.kicad_sch

@@ -4,13 +4,6 @@
 	(generator_version "8.0")
 	(uuid "af4d11a6-73e1-4c39-a25e-5fe7dfa07237")
 	(paper "A3")
-	(title_block
-		(title "power-supply-board")
-		(date "2024-12-20")
-		(rev "V1.0")
-		(comment 2 "Supplies 3V3, 5V -5V, 12V, Filtered 24V")
-		(comment 3 "Supply board for rpi-interface board")
-	)
 	(lib_symbols
 		(symbol "Amplifier_Operational:MCP6002-xP"
 			(pin_names
@@ -14511,7 +14504,7 @@
 		)
 		(uuid "c5813cfa-ba8c-4a80-a9d4-664143707d07")
 	)
-	(text "2 NTC sensors spread in housing\ne.g. RPI Cpu and 5V Regulator"
+	(text "2 NTC sensors spread in housing"
 		(exclude_from_sim no)
 		(at 208.534 59.436 0)
 		(effects
@@ -14682,7 +14675,7 @@
 		)
 		(uuid "f9ba8cda-125a-469c-9294-dbb980b4df9f")
 	)
-	(text "TODO next version:\n  - add LED for each voltage in housing (external using connector)?\n  - FIXME: Verify power supply barrel connector polarity (wrong in V1.0)\n\nChangelog / Fixed since V1.0:\n  - TVS polarity\n  - Fuse, Diode footprint\n  - add GND Testpoint\n  - led gnd via\n  - 5x low power connector\n\n"
+	(text "TODO next version:\n  - add LED for each voltage in housing (external using connector)?\n  - FIXME: Verify power supply barrel connector polarity (wrong in V1.0)\n\nFixed since V1.0:\n  - TVS polarity\n  - Fuse, Diode footprint\n  - add GND Testpoint\n  - led gnd via\n  - 5x low power connector\n\n"
 		(exclude_from_sim no)
 		(at 114.3 34.544 0)
 		(effects

rpi-scripts/examples/read_analog_inputs.py

@@ -1,20 +0,0 @@
-# Include external libraries
-import os
-import sys
-import time
-from mcp3208 import MCP3208
-
-
-# Include custom files
-# Add the parent directory to the module search path
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
-from interface_board_libs.adc_mcp3208 import MCP3208
-from interface_board_pins import ADC_CHANNELS
-
-
-adc = MCP3208()
-
-while True:
-        for i in range(8):
-                print('ADC[{}]: {:.2f}'.format(i, adc.read(i)))
-        time.sleep(0.5)

rpi-scripts/examples/read_digital_inputs.py

@@ -1,30 +0,0 @@
-# Add the parent directory to the module search path
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
-# Include the common pin assignment (from parent folder)
-from interface_board_pins.py import GPIO_DIGITAL_INPUTS # map of which GPIO pins are associated with which input terminal (1-8)
-
-import RPi.GPIO as GPIO
-
-
-
-# Initialize GPIO
-GPIO.setmode(GPIO.BCM)
-for pin in DIGITAL_INPUTS.values():
-    GPIO.setup(pin, GPIO.IN)
-
-
-
-# Repeatedly read GPIOs
-print("Reading digital inputs:")
-try:
-    while True:
-        for label, pin in GPIO_DIGITAL_INPUTS.items():
-            state = GPIO.input(pin)
-            print(f"Input {label} (GPIO {pin}): {'HIGH' if state else 'LOW'}")
-        print("-" * 40)
-
-except KeyboardInterrupt:
-    print("Exiting...")
-
-finally:
-    GPIO.cleanup()

rpi-scripts/examples/write_digital_outputs_shift_reg.py

@@ -1,66 +0,0 @@
-# Include external libraries
-import os
-import sys
-from time import sleep
-
-# Add the parent directory to the module search path
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
-
-# Include custom files
-from interface_board_libs.shift_register import ShiftRegister # custom shift register class
-from interface_board_pins import ( # pin / channel assignment
-    GPIO_SHIFT_REG_DATA,
-    GPIO_SHIFT_REG_LATCH,
-    GPIO_SHIFT_REG_CLOCK,
-    SHIFT_REG_CHANNEL_BUZZER,
-    SHIFT_REG_CHANNEL_RELAY1,
-    SHIFT_REG_CHANNEL_RELAY2,
-)
-
-
-# Initialize the shift register
-sr = ShiftRegister(GPIO_SHIFT_REG_DATA, GPIO_SHIFT_REG_LATCH, GPIO_SHIFT_REG_CLOCK)
-
-try:
-    print("Writing to shift register...")
-
-    # repeatedly write to shift register
-    while True:
-        # # Cycle through all combinations of pin states (write entire byte)
-        # print("Writing all byte values (0-255)...")
-        # for value in range(256):
-        #     sr.write_byte(value)  # Write the current value
-        #     print(f"Output: {bin(value)}")  # Print binary representation
-        #     sleep(0.05)  # Delay between each byte
-
-        # Turn each pin on and off one by one
-        print("\nToggling each pin one by one...")
-        # channels 0-4 are connected to terminal only
-        for pin in range(4): # 0-4 are connected to terminal only
-            print(f"Setting pin {pin} HIGH.")
-            sr.set_pin(pin, True)  # Set the pin HIGH
-            sleep(0.5)
-            print(f"Setting pin {pin} LOW.")
-            sr.set_pin(pin, False)  # Set the pin LOW
-            sleep(0.5)
-
-        # channels 5-7 are connected to terminal AND buzzer/relays
-        print("Activating buzzer...")
-        sr.set_pin(SHIFT_REG_CHANNEL_BUZZER, True)  # Turn buzzer ON
-        sleep(0.5)
-        sr.set_pin(SHIFT_REG_CHANNEL_BUZZER, False)  # Turn buzzer OFF
-
-        print("Toggling Relay 1...")
-        sr.toggle_pin(SHIFT_REG_CHANNEL_RELAY1)
-        sleep(0.5)
-        sr.toggle_pin(SHIFT_REG_CHANNEL_RELAY1)
-
-        print("Activating Relay 2...")
-        sr.set_pin(SHIFT_REG_CHANNEL_RELAY2, True)  # Turn relay ON
-        sleep(0.5)
-        sr.set_pin(SHIFT_REG_CHANNEL_RELAY2, False)  # Turn relay OFF
-
-finally:
-    sr.clear()  # Clear the shift register
-    print("Shift register cleared.")
-    GPIO.cleanup()  # Clean up GPIO settings

rpi-scripts/interface_board_libs/shift_register.py

@@ -1,49 +0,0 @@
-import RPi.GPIO as GPIO
-from time import sleep
-
-
-class ShiftRegister:
-    def __init__(self, data_pin, latch_pin, clock_pin):
-        self.data_pin = data_pin
-        self.latch_pin = latch_pin
-        self.clock_pin = clock_pin
-        self.current_byte = 0  # Tracks the current state of the shift register
-
-        GPIO.setmode(GPIO.BCM)
-        GPIO.setup(self.data_pin, GPIO.OUT)
-        GPIO.setup(self.latch_pin, GPIO.OUT)
-        GPIO.setup(self.clock_pin, GPIO.OUT)
-
-    def write_byte(self, byte):
-        """Writes an 8-bit value to the shift register."""
-        GPIO.output(self.latch_pin, 0)
-        for i in range(8):
-            GPIO.output(self.clock_pin, 0)
-            GPIO.output(self.data_pin, (byte >> (7 - i)) & 1)  # MSB first
-            GPIO.output(self.clock_pin, 1)
-        GPIO.output(self.latch_pin, 1)
-        self.current_byte = byte  # Update the internal state
-
-    def clear(self):
-        """Clears the shift register (sets all outputs to 0)."""
-        self.write_byte(0)
-
-    def set_pin(self, pin, state):
-        """
-        Sets an individual pin to HIGH (1) or LOW (0).
-        Pins are numbered 0-7, with 0 being the MSB.
-        """
-        if not 0 <= pin <= 7:
-            raise ValueError("Pin must be in range 0-7.")
-        if state:
-            self.current_byte |= (1 << (7 - pin))  # Set the bit to 1
-        else:
-            self.current_byte &= ~(1 << (7 - pin))  # Set the bit to 0
-        self.write_byte(self.current_byte)
-
-    def toggle_pin(self, pin):
-        """Toggles the state of an individual pin."""
-        if not 0 <= pin <= 7:
-            raise ValueError("Pin must be in range 0-7.")
-        self.current_byte ^= (1 << (7 - pin))  # Flip the bit
-        self.write_byte(self.current_byte)

rpi-scripts/interface_board_pins.py

@@ -1,85 +0,0 @@
-# Pin mappings for GPIOs and other components specifically for the pi-interface-board_v1.0
-
-
-
-# === Digital Inputs ===
-# Pin mappings for digital inputs (labeled on housing as 1-8)
-GPIO_DIGITAL_INPUTS = {
-    1: 25,  # Dig-IN_1 is connected to GPIO_25
-    2: 16,  # Dig-IN_2 is connected to GPIO_16
-    3: 26,  # Dig-IN_3 is connected to GPIO_26
-    4: 13,  # Dig-IN_4 is connected to GPIO_13
-    5: 6,   # Dig-IN_5 is connected to GPIO_6
-    6: 5,   # Dig-IN_6 is connected to GPIO_5
-    7: 22,  # Dig-IN_7 is connected to GPIO_22
-    8: 24,  # Dig-IN_8 is connected to GPIO_24
-}
-
-
-
-
-# === Shift Register ===
-GPIO_SHIFT_REG_DATA = 27
-GPIO_SHIFT_REG_LATCH = 17
-GPIO_SHIFT_REG_CLOCK = 4
-
-# Shift Register Channel Assignments
-SHIFT_REG_CHANNEL_BUZZER = 7  # Buzzer connected to shift register channel 7
-SHIFT_REG_CHANNEL_RELAY1 = 6  # Relay 1 connected to shift register channel 6
-SHIFT_REG_CHANNEL_RELAY2 = 5  # Relay 2 connected to shift register channel 5
-
-
-
-
-# === ADC ===
-# ADC IC is connected to RPI SPI interface 0 (pins below)
-ADC_SPI_BUS_NUM = 0  
-ADC_SPI_DEVICE_NUM = 0
-ADC_SPI_CS_PIN = 8  # SPI Chip Select for MCP3208
-# MISO_0: GPIO_9
-# MOSI_0: GPIO_10
-# SCLK_0: GPIO_11
-# CE_0:   GPIO# MCP3208 (ADC)
-
-ADC_CHANNELS = {
-    1: 0,  # Channel 1 = ADC channel 0
-    2: 1,  # Channel 2 = ADC channel 1
-    3: 2,  # ...
-    4: 3,
-    5: 4,
-    6: 5,
-    7: 6,
-    8: 7
-}
-
-
-
-
-# === SPI Terminal ===
-SPI_BUS_NUM = 1
-# MISO_1: GPIO_19
-# MOSI_1: GPIO_20
-# SCLK_1: GPIO_21
-# CE_1:   GPIO_7
-
-
-
-
-# === I2C Terminal ===
-GPIO_I2C_SDA = 2
-GPIO_I2C_SCL = 3
-
-
-
-
-# === PWM outputs ===
-GPIO_PWM1 = 12  # RPI_PWM0
-GPIO_PWM2 = 18  # RPI_PWM0 too
-
-
-
-
-# === UART / RS485 ===
-GPIO_UART_TX = 14 # RPI TXD
-GPIO_UART_RX = 15 # RPI RXD
-GPIO_UART_DIR = 23