4 layers49 × 75 mm
ElectronULA
adbsolutions/ElectronULA
Project to create replacement ULA board for Acorn Electron
44 parts17GPL-3.0
4 layers49 × 68.4 mm
ElectronULA
adbsolutions/ElectronULA17Project to create replacement ULA board for Acorn Electron
- Size
- 49 × 68.4 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 191
- Pads
- 563
- Tracks, vias
- 1,759, 265
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 4 May 2020
- Updated
- 27 Sep 2025
Overview
ElectronULA is an open-source printed circuit board by adbsolutions, from the adbsolutions/ElectronULA repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 49 × 68.4 mm with 89 parts on 191 nets, routed with 1,759 tracks and 265 vias.
It is built around the 10M08SCE144C8G, SN74HCT125D and 74LVC4245APW, with the MIC7221YM5-TR among its other parts. Its parts include 39 resistors, 31 capacitors, 10 ICs, 2 diodes and 2 connectors. It belongs with the FPGA and CPLD boards of this library.
Main components
4
10M08SCE144C8G
LQFP-144-EP(20x20)0℃~+85℃ 101 2.85V~3.465V 387072bit 500 8000 Integrated temperature sensor、Supports SEU error detection and correction、Supports UID protection、Supports AES encryption MAX 10 LQFP-144-EP(20x20) Programmable Logic Device (CPLDs/FPGAs) ROHSIntel/AlteraProgrammable Logic Device (CPLDs/FPGAs)
SN74HCT125D
SOIC-14-40℃~+85℃ 1 18ns@5.5V,50pF 4 4.5V~5.5V 6mA 6mA 74HCT 80uA Tri-State Unidirectional SOIC-14 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74LVC4245APW
TSSOP-24-40℃~+125℃ 1 1.5V~3.6V 1.5V~5.5V 8 Bidirectional Power-off protection、Output enable high-impedance TTL TTL Tri-State TSSOP-24 Translators, Level Shifters ROHSNexperiaTranslators, Level Shifters
MIC7221YM5-TR
SOT-23-5-40℃~+85℃ 0.25pA 0.5pA 1 12V 1uV/℃ 2.2V~10V 2mV 5us 5us 70dB 7uA Open-drain Rail-to-rail input SOT-23-5 Comparators ROHSMicrochip TechnologyComparators
README
README.mdElectronULA
Project to create replacement ULA board for the Acorn Electron. See Wiki
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 0.1uf | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C21, C22, C23, C24 +10 |
| 19 | 10K | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1, R2, R3, R4, R5, R10, R11, R12, R13, R17, R24, R26, R27, R28, R29, R30 +3 |
| 8 | 300 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R32, R33, R34, R35, R36, R37, R38, R39 |
| 6 | 74LVC4245APW | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U3, U4, U5, U6, U7, U8 |
| 5 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R9, R14, R15, R16, R18 |
| 4 | 4.7K | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R20, R21, R22, R23 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C25, C29 |
| 2 | D_Schottky_Small | Diode_SMD:D_SOD-323_HandSoldering | D1, D2 |
| 1 | 0.1uf | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C31 |
| 1 | 0.1uf | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C20 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R25 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R31 |
| 1 | 10M08SCE144C8G | Personal:QFP50P2200X2200X165-145N | U1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C27 |
| 1 | 4.7K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19 |
| 1 | AP111733 | TO_SOT_Packages_SMD:SOT-223 | U9 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | JTAG1 |
| 1 | ELECTRON_ULA_PGA_68 | Personal:PLCC-68_THT-Socket-Electron-ULA | U10 |
| 1 | MIC7221YM5-TR | Package_TO_SOT_SMD:SOT-23-5 | CMP1 |
| 1 | Micro_SD_Card_Det_Hirose_DM3AT | Connector_Card:microSD_HC_Hirose_DM3D-SF | J2 |
| 1 | MountingHole_2.7mm_M2.5_ISO7380_Pad | MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad | FPGAHOLE |
| 1 | OSC | Personal:Crystal_SMD_7050_4Pads | X1 |
| 1 | SN74HCT125D | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U2 |
| 1 | SW_DIP_x04 | Button_Switch_SMD:SW_DIP_SPSTx04_Slide_Copal_CHS-04B_W7.62mm_P1.27mm | SW1 |
Questions
How big is the ElectronULA PCB?
It measures 49 × 68.4 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ElectronULA use?
89 parts, built around the 10M08SCE144C8G, SN74HCT125D, 74LVC4245APW and MIC7221YM5-TR. 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 ElectronULA KiCad files?
From the adbsolutions/ElectronULA repository on GitHub, at the commit this page was made from: the board is Kicad/ElectronULA - MAX 10 Board V1.05/ElectronULA.kicad_pcb and its schematic Kicad/ElectronULA - MAX 10 Board V1.05/ElectronULA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ElectronULA design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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