Sourcing PCB Calculating BOM

BOM - Sourcing - Pricing-DataSheet/.~lock.0004-DenshaBekutoru_v0.2 - BOM and Vendor.ods#

@@ -0,0 +1 @@
+,tgohle,NUC2,02.08.2026 16:12,file:///home/tgohle/.config/libreoffice/4;

KiCad/0004-DenshaBekutoru_v0.2/0004-DenshaBekutoru_v0.2.csv

@@ -1,25 +1,30 @@
-"Reference","Value","Datasheet","Footprint","Qty","DNP"
+"Source:","/home/tgohle/Desktop/git/ToGo-Lab/0004-DenshaBekutoru/KiCad/0004-DenshaBekutoru_v0.2/0004-DenshaBekutoru_v0.2.kicad_sch"
-"A1","Arduino_Pro_Mini_Socket_NoSPH_V2","https://docs.arduino.cc/retired/boards/arduino-pro-mini","arduino-library:Arduino_Pro_Mini_Socket_NoSPH_V2","1",""
+"Date:","2026-07-29T19:17:05"
-"C4","4.7µF","~","Capacitor_THT:CP_Axial_L10.0mm_D6.0mm_P15.00mm_Horizontal","1",""
+"Tool:","Eeschema 10.0.5-10.0.5~ubuntu24.04.1"
-"C5","100nF","~","Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm","1",""
+"Generator:","/usr/share/kicad/plugins/bom_csv_grouped_by_value_with_fp.py"
-"D1,D2","1N4148","https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf","Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal","2",""
+"Component Count:","32"
-"D3","1N5819","http://www.vishay.com/docs/88525/1n5817.pdf","Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal","1",""
+"Ref","Qnty","Value","Cmp name","Footprint","Description","Vendor","DNP"
-"D4","LED Green","~","LED_THT:LED_D3.0mm","1",""
+"A1","1","Arduino_Pro_Mini_Socket_NoSPH_V2","Arduino_Pro_Mini_Socket_NoSPH_V2","arduino-library:Arduino_Pro_Mini_Socket_NoSPH_V2","Socket for Arduino Pro Mini (without Programming Header Pins)","",""
-"D5","LED Yellow","~","LED_THT:LED_D3.0mm","1",""
+"C4","1","4.7µF","C_Polarized","Capacitor_THT:CP_Axial_L10.0mm_D6.0mm_P15.00mm_Horizontal","Polarized capacitor","",""
-"D10","LED: HL_A.1","","LED_THT:LED_D5.0mm_Clear","1",""
+"C5","1","100nF","C_Small","Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm","Unpolarized capacitor, small symbol","",""
-"D11","LED: HL_A.2","","LED_THT:LED_D5.0mm_Clear","1",""
+"D1, D2","2","1N4148","1N4148","Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal","100V 0.15A standard switching diode, DO-35","",""
-"D12","LED: HL_B.1","","LED_THT:LED_D5.0mm_Clear","1",""
+"D3","1","1N5819","1N5819","Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal","40V 1A Schottky Barrier Rectifier Diode, DO-41","",""
-"D13","LED: HL_B.2","","LED_THT:LED_D5.0mm_Clear","1",""
+"D4","1","LED Green","LED","LED_THT:LED_D3.0mm","Light emitting diode","",""
-"J1","from Lego","~","Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical","1",""
+"D5","1","LED Yellow","LED","LED_THT:LED_D3.0mm","Light emitting diode","",""
-"J2","Headlight GND","~","Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical","1",""
+"D10","1","LED: HL_A.1","LED","LED_THT:LED_D5.0mm_Clear","Light emitting diode","",""
-"J3","Headlight GND; A1,2/B1,2","~","Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical","1",""
+"D11","1","LED: HL_A.2","LED","LED_THT:LED_D5.0mm_Clear","Light emitting diode","",""
-"J4","Headlight Test","~","Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Horizontal","1",""
+"D12","1","LED: HL_B.1","LED","LED_THT:LED_D5.0mm_Clear","Light emitting diode","",""
-"J5","I2C","~","Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical","1",""
+"D13","1","LED: HL_B.2","LED","LED_THT:LED_D5.0mm_Clear","Light emitting diode","",""
-"J6","TX/RX","~","Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical","1",""
+"J1","1","from Lego","Conn_01x04_Pin","Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical","Generic connector, single row, 01x04, script generated","",""
-"J7","Add. Lights","~","Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical","1",""
+"J2","1","Headlight GND","Conn_01x04_Socket","Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical","Generic connector, single row, 01x04, script generated","",""
-"J8","LDR (~1MOhm) Option","~","Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical","1",""
+"J3","1","Headlight GND; A1,2/B1,2","Conn_01x05_Socket","Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical","Generic connector, single row, 01x05, script generated","",""
-"R1,R2","1.5k","~","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","2",""
+"J4","1","Headlight Test","Conn_01x05_Pin","Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Horizontal","Generic connector, single row, 01x05, script generated","",""
-"R3,R4,R5,R6,R7,R8","220","~","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","6",""
+"J5","1","I2C","Conn_01x03_Pin","Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical","Generic connector, single row, 01x03, script generated","",""
-"R9","10k","~","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","1",""
+"J6","1","TX/RX","Conn_01x03_Pin","Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical","Generic connector, single row, 01x03, script generated","",""
-"RV1","1MOhm","~","Potentiometer_THT:Potentiometer_Piher_PT-10-V10_Vertical","1",""
+"J7","1","Add. Lights","Conn_01x04_Socket","Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical","Generic connector, single row, 01x04, script generated","",""
-"U1,U2","PC817","http://www.soselectronic.cz/a_info/resource/d/pc817.pdf","Package_DIP:DIP-4_W7.62mm","2",""
+"J8","1","LDR (~1MOhm) Option","Conn_01x02_Socket","Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical","Generic connector, single row, 01x02, script generated","",""
+"R1, R2","2","1.5k","R","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","Resistor","",""
+"R3, R4, R5, R6, R7, R8","6","220","R","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","Resistor","",""
+"R9","1","10k","R","Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal","Resistor","",""
+"RV1","1","1MOhm","R_Potentiometer","Potentiometer_THT:Potentiometer_Piher_PT-10-V10_Vertical","Potentiometer","",""
+"U1, U2","2","PC817","PC817","Package_DIP:DIP-4_W7.62mm","DC Optocoupler, Vce 35V, CTR 50-300%, DIP-4","",""

README.md

@@ -1,12 +1,90 @@
-# DenshaBekutoru - Model Train Direction Sensor
+# 電車ベクトル (DenshaBekutoru)  
 
-Get **direction** and **speed** from motor power signals.  
+## Model Train Direction Sensor
-Target use case: **model trains**.
 
-- Detects polarity (+/–) to identify train direction  
+DenshaBekutoru is a small controller board for brick-built model locomotives.
-- Measures pulse width to calculate speed (% of maximum)  
-- Implemented with optocouplers and a state machine  
-- As small as possible, but I hope no SMD (beginner friendly)
 
-Project is in an early stage. Currently running tests on target hardware.  
+The target use case is: read the motor power signals, detect the current driving direction, and switch the headlights accordingly. The software is also prepared to derive speed information from the motor signal behaviour.
-More information and documentation will follow.
+
+This project is built around one practical problem: the motor is driven from an H-bridge, so the signal is noisy, polarity changes are not “clean logic”, and inductive spikes make direct evaluation difficult.
+
+## What it does
+
+- detects train direction from the motor power signal
+- evaluates two processed motor-side signals via analogue inputs
+- switches the front / rear lights according to direction
+- keeps the last valid direction if the train stops or the signal becomes unclear
+- is designed as small as possible for installation in brick-built locomotives
+
+## Technical approach
+
+The current version is built around:
+
+- optocoupler-based input isolation and signal conditioning
+- Arduino Pro Mini 5V as controller
+- software averaging of analogue inputs
+- startup calibration to adapt to different controllers and builds
+- threshold + hysteresis logic
+- simple state machine with direction memory
+- PWM-capable output pins for possible later LED dimming
+
+The main idea is not to read one raw signal and react immediately.  
+The idea is to turn a noisy motor signal into a stable direction decision.
+
+## Current status
+
+**Version 2 (beta) is built and working.**
+
+Current state:
+
+- [x] schematic finished
+- [x] PCB finished
+- [x] firmware finished for the current beta state
+- [x] three PCBs built and tested
+- [x] first boards handed over for real-life testing in a model railway club
+- [ ] Feedback and what to improve
+
+## Design goals
+
+- as small as possible
+- beginner-friendly where possible
+- no SMD if it can reasonably be avoided
+- easy to reproduce later as a DIY kit
+- modular PCB concept with main section, future-option section, and test section
+
+## Repository content
+
+Typical content of this repository:
+
+- `KiCad/` – schematic and PCB files
+- `firmware/` – Arduino test and controller software
+- documentation and pictures will be added step by step
+
+## Project status note
+
+This is still a beta project.
+
+The current hardware and software already work, but testing on real locomotives is still ongoing.  
+The next version will depend on real-life feedback from actual use.
+
+Possible next steps:
+
+- verify behaviour with different motor controllers
+- check robustness in real train builds
+- improve wiring / connector handling
+- finalise optional features like LED dimming
+- prepare a first “official” DIY kit version
+
+## Blog / documentation
+
+- Project overview:  https://togo-lab.io/?p=223
+- Hardware description:  https://togo-lab.io/?p=233
+- Software description:  https://togo-lab.io/?p=243
+
+## Short summary
+
+DenshaBekutoru is a small Arduino-based direction sensor for brick-built model trains.
+
+It reads the noisy motor signal from an H-bridge-driven setup, isolates and evaluates it, and switches the headlights automatically.
+
+The current beta version is working and now entering real-life testing.

firmware/ArduinoTest/DenshaBekutoru-0004_Version-0-2_ProMini_PCB2026-2_V01/NOTES.ino

@@ -0,0 +1,4 @@
+#if 0
+// Project-specific instructions
+
+#endif