2 layers45.2 × 34.8 mm
2 layers112.9 × 63.7 mm
MbElectricalSystem
catinella/mbElectricalSystemGeneric Motorbike Electrical System
- Size
- 112.9 × 63.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 125
- Nets
- 113
- Pads
- 391
- Tracks, vias
- 1,535, 188
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Mar 2023
- Updated
- 10 Sep 2026
Overview
MbElectricalSystem is an open-source printed circuit board by catinella, from the catinella/mbElectricalSystem repository on GitHub. It is a 2-layer board of 112.9 × 63.7 mm with 125 parts on 113 nets, routed with 1,535 tracks and 188 vias.
It is built around the ESP32-S2-DEVKITM-1, L7805 and BC817, with the TPCA8120,L1Q(CM, BC807 and PMEG40T30ERX among its other parts. Its parts include 46 resistors, 23 transistors, 4 diodes, 2 capacitors and 2 ICs. It belongs with the ESP32 boards of this library.
Main components
7ESP32-S2-DEVKITM-1
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
TPCA8120,L1Q(CM
SOP-8UncategorisedToshibaBC807
SOT-23-65℃~+150℃ 1 PNP 100 100nA 345mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
PMEG40T30ERX
SOD-123W1 Independent 28uA@40V 3A 40A 40V 525mV@3A SOD-123W Schottky Diodes ROHSNexperiaSchottky Diodes
MF-MSMF050-2
1812-40℃~+85℃ 100A 150mΩ 15V 1A 1Ω 3.2mm 5.4mm 500mA 1812 Resettable Fuses ROHSBournsResettable Fuses
README
PCB/pcb-c/README.md
1.0 Files
| Files/Directories | Description |
|---|---|
| pcb-c.kicad_sch | Electric symbolic scheme |
| pcb-c.kicad_pcb | PCB |
(*) This project is covered by the GPL-3. Please, read that file for further information
2.0 Description:
This folder contains all files you need to build and/or modify the PCB placed in the rear side of the (DR350) motorbike. This circuit is a small power stage for the rear light indicators, stop light, and position light. Because all lights are available in LED format, the power stage is set to provide maximum 500mA (6W) per device.
2.1 Internals:
In order to fit this device in the DR350 rear size, I have tried to reduce the required space as much as possible. Also for this reason, normal fuses have been replaced by MSMF050 PTC Resettable Fuses.
All the power stage's outputs are equivalent but one is dedicated to the motorbike's starter relay. This relay type can be a big one, often. So, a fly-back diode is very important. For this reason I have used a M7 Rectifiers Diode.
3.0 Devices building:
The following images shows you the PCB shape it should be at the end
Parts
125| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 100K | Resistor_SMD:R_1206_3216Metric | R1, R5, R13, R14, RA1, RA15, RA16, RA17, RA18, RA19, RA20, RA22, RA23, RA24, RA25, RA27 +3 |
| 13 | 10K | Resistor_SMD:R_1206_3216Metric | R2, R9, RA2, RA9, RA10, RA11, RA12, RA13, RA37, RA38, RA40, RA46, RA49 |
| 11 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q2, Q4, Q8, Q9, Q10, Q11, Q13, Q14, Q15, Q17, Q19 |
| 11 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | addLights1, Decomp_1, DownLight_p1, engReadyLed1, extpwr1, KeySW1, leftArrow_p1, LightOnOff_sw1, powerOFF1, rearDevsPwr1, rightArrow_p1 |
| 9 | 1K | Resistor_SMD:R_1206_3216Metric | R3, R4, R6, RA14, RA42, RA43, RA44, RA48, RA51 |
| 7 | 5K | Resistor_SMD:R_1206_3216Metric | RA30, RA31, RA32, RA33, RA34, RA35, RA36 |
| 7 | TPCA8120,L1Q | TPCA80120:TPH4R003NLL1Q | Q3, Q5, Q6, Q7, Q12, Q16, Q18 |
| 6 | 0 | Resistor_SMD:R_1206_3216Metric | RA3, RA4, RA5, RA6, RA7, RA8 |
| 6 | Conn_01x01 | Connector_Wire:SolderWire-1sqmm_1x01_D1.4mm_OD2.7mm | addLight_p2, GND3, GND4, GND5, Horn_p2, UpLight_p2 |
| 5 | BC807 | Package_TO_SOT_SMD:SOT-23 | Q1, Q20, Q22, Q23, Q24 |
| 4 | Conn_01x02 | Connector_JST:JST_VH_B2P-VH-FB-B_1x02_P3.96mm_Vertical | addLight_p1, Battery1, Horn_p1, UpLight_p1 |
| 4 | PMEG40T30ER | Diode_SMD:Nexperia_CFP3_SOD-123W | D1, D2, D3, flyback-1 |
| 3 | 33K | Resistor_SMD:R_1206_3216Metric | R10, R11, R12 |
| 2 | 10K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 2 | 15K | Resistor_SMD:R_1206_3216Metric | R7, R8 |
| 2 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | leftCtrls_conn1, RearDevs1 |
| 2 | MF-MSMF050-2 | MSMF:FUSE_F050-2 | F1, F2 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric | RA21 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C1 |
| 1 | 20K | Resistor_SMD:R_1206_3216Metric | RA29 |
| 1 | C_Polarized_Small | Capacitor_THT:CP_Radial_D8.0mm_P2.50mm | C2 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | koso-1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | Key-locker-1 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | rightCtrls_conn1 |
| 1 | Conn_02x05_Counter_Clockwise | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | LEDs_conn1 |
| 1 | ESP32-S2-DevKitM | esp32_dk:ESP32-S2-DevKitM | U1 |
| 1 | HK19F-DCxxV-SHC | Relay_THT:Relay_DPDT_Finder_30.22 | K1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | config | Button_Switch_THT:SW_DIP_SPSTx02_Slide_6.7x6.64mm_W7.62mm_P2.54mm_LowProfile | SW1 |
Questions
How big is the MbElectricalSystem PCB?
It measures 112.9 × 63.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MbElectricalSystem use?
125 parts, built around the ESP32-S2-DEVKITM-1, L7805, BC817 and TPCA8120,L1Q(CM. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MbElectricalSystem KiCad files?
From the catinella/mbElectricalSystem repository on GitHub, at the commit this page was made from: the board is PCB/main.kicad_pcb and its schematic PCB/main.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MbElectricalSystem design in my own project?
Its repository states no licence, so its author keeps all rights: ask catinella before reusing the design.
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