2 layers36.5 × 18.9 mm
2 layers19.2 × 94 mm
Final PCB
T0mmy312/Breaklight2- Size
- 19.2 × 94 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 84
- Nets
- 81
- Pads
- 305
- Tracks, vias
- 646, 83
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Sep 2025
- Updated
- 2 Feb 2026
Overview
Final PCB is an open-source printed circuit board by T0mmy312, from the T0mmy312/Breaklight repository on GitHub. It is a 2-layer board of 19.2 × 94 mm with 84 parts on 81 nets, routed with 646 tracks and 83 vias.
It is built around the ATTINY85-20SFR, PCA9955BTWJ and MPU-6050, with the TPS63000-Q1DRC, LS E65F-BBDA-1-1 and CAS-120A1 among its other parts. Its parts include 19 resistors, 15 capacitors, 11 diodes, 6 ICs and 2 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
6
ATTINY85-20SFR
SOIC-8-208mil-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH SOIC-8-208mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PCA9955BTWJ
HTSSOP-28-EP-40℃~+105℃ 16 31.25kHz~1MHz 3V~5.5V 4% 57mA DC-DC Over-Temperature Protection (OTP)、Short-Circuit Protection PWM、I2C HTSSOP-28-EP LED Drivers ROHSNXP SemiconductorsLED Drivers
MPU-6050
QFN-24-EP(4x4)-40℃~+85℃ 16bit 1KB 2.375V~3.46V 5uA Accelerometer Gyroscope I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(4x4) Accelerometers ROHSTDK InvenSenseAccelerometers
TPS63000-Q1DRC
UncategorisedTexas InstrumentsLS E65F-BBDA-1-1
1412(3730metric)1412(3730metric) Lack of specifications ROHSOSRAM Opto SemiconUncategorised
CAS-120A1
SMD-40℃~+85℃ 100mA 2.5mm 2.5mm 5.4mm 6V J-Lead SPDT Surface Mount,Vertical SMD Slide Switches ROHSNidecSlide Switches
Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP2, TP3, TP4, TP5, TP6, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19 +3 |
| 11 | 10k | Resistor_SMD:R_0603_1608Metric | R4, R8, R9, R10, R11, R12, R15, R16, R17, R18, R19 |
| 10 | LS_E65F-BBDA-1-1 | custom:LSE65FBBDA11 | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10 |
| 5 | 0.1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4, C12, C14, CVDD1 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric | C8, C15, C16 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 330 | Resistor_SMD:R_0603_1608Metric | RBAT1, RVDD1 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | Ra1, Rd1 |
| 2 | CAS-120A1 | custom:CAS120A1 | S1, S2 |
| 2 | Q_NMOS_Depletion_DSG | custom:MOSFET_BSC093N04LSGATMA1 | Q1, Q2 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | RPACK1 |
| 1 | 178k | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 2.2u | Inductor_SMD:L_0603_1608Metric | L11 |
| 1 | 2.2uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 23 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 260 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 2k2 | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 4.7k7 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 40u | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 47u | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | ATTINY85-20SFR | custom:SOIC127P798X216-8N | IC3 |
| 1 | BQ25895MRTWT | custom:QFN50P400X400X80-25N-D | IC1 |
| 1 | BQ298xy | custom:QFN50P150X150X40-8N | U2 |
| 1 | Battery_Cell | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | Conn_ARM_SWD_TagConnect_TC2030-NL | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J2 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | MPU-6050 | Sensor_Motion:InvenSense_QFN-24_4x4mm_P0.5mm | U11 |
| 1 | PCA9955BTWJ | custom:SOP65P640X110-29N | IC2 |
| 1 | TPS63000-Q1 | Package_SON:Texas_DRC0010J_ThermalVias | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J1 |
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Questions
How big is the Final PCB PCB?
It measures 19.2 × 94 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Final PCB use?
84 parts, built around the ATTINY85-20SFR, PCA9955BTWJ, MPU-6050 and TPS63000-Q1DRC. 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 Final PCB KiCad files?
From the T0mmy312/Breaklight repository on GitHub, at the commit this page was made from: the board is Hardware/PCB/Final_V1/Final_PCB/Final_PCB.kicad_pcb and its schematic Hardware/PCB/Dynamo/schaltplan_layout/Dynamo_circiut.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Final PCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask T0mmy312 before reusing the design.