2 layers50.6 × 129 mm
2 layers50.6 × 129 mm
Controller
WojtaCZ/cern-clock- Size
- 50.6 × 129 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 109
- Pads
- 269
- Tracks, vias
- 418, 86
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 26 May 2024
- Updated
- 30 Apr 2025
Overview
Controller is an open-source printed circuit board by WojtaCZ, from the WojtaCZ/cern-clock repository on GitHub. It is a 2-layer board of 50.6 × 129 mm with 43 parts on 109 nets, routed with 418 tracks and 86 vias.
It is built around the SN74HCS244DGS, LIS2DW12 and SN74LXC8T245PW, with the USBLC6-2SC6, BSS138 and USB4800-03-A among its other parts. Its parts include 12 capacitors, 8 resistors, 5 ICs, 2 transistors and 2 connectors. It belongs with the RP2040 boards of this library.
Main components
6
SN74HCS244DGS
VSSOP-20-40℃~+125℃ 1 16ns@6V,50pF 2V~6V 2uA 7.8mA 7.8mA 74HCS 8 Schmitt trigger Tri-State Unidirectional VSSOP-20 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
LIS2DW12
LGA-12(2x2)-40℃~+85℃ 1.62V~3.6V 16bit 50nA Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSSTMicroelectronicsAccelerometers
SN74LXC8T245PW
TSSOP-24-40℃~+125℃ 1 1.1V~5.5V 1.1V~5.5V 420Mbps 8 Bidirectional Level translator Power-off protection、Output enable high-impedance、Integrated pull-up resistor SPI、JTAG、UART Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETsUSB4800-03-A
SMD-25℃~+85℃ 1 12P 48V 5A Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
README
README.mdCERN CLOCK
This repository contains all the files for the CERN CLOCK project. The firmware folder contains the assembly for the 6809 processor as well as the sources for the RP Pico W. Hardware contains the reverse engineered schematic of the decoder board and the project for the controller board. Mechanical folder contains the 3D printable parts and outlines for the plexi panels.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 |
| 6 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C6, C9, C10 |
| 6 | 10u | Capacitor_SMD:C_0603_1608Metric | C1, C7, C8, C11, C12, C13 |
| 4 | M2 | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R7, R8 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 33 | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | Conn_02x32_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x32_P2.54mm_Vertical_SMD | J1 |
| 1 | LED FILAMENT | decoder:Con_01x02_2.54_SMD | D1 |
| 1 | LIS2DW12 | Package_LGA:LGA-12_2x2mm_P0.5mm | U4 |
| 1 | PKMCS0909E | Buzzer_Beeper:Buzzer_Murata_PKMCS0909E | LS1 |
| 1 | PicoW | RPi_Pico:RPi_PicoW_SMD_TH | U2 |
| 1 | SN74HCS244 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U6 |
| 1 | SN74LXC8T245 | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U1 |
| 1 | USB4800 | decoder:USB_C_Receptacle_GCT_USB4800 | J3 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
Questions
How big is the Controller PCB?
It measures 50.6 × 129 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Controller use?
43 parts, built around the SN74HCS244DGS, LIS2DW12, SN74LXC8T245PW and USBLC6-2SC6. 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 Controller KiCad files?
From the WojtaCZ/cern-clock repository on GitHub, at the commit this page was made from: the board is hardware/controller/controller.kicad_pcb and its schematic hardware/controller/controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Controller design in my own project?
Its repository states no licence, so its author keeps all rights: ask WojtaCZ before reusing the design.
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