2 layers75 × 106.5 mm
2 layers51.5 × 74 mm
XnetBlockUnit
bask185/Train-Science-DIY3- Size
- 51.5 × 74 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 57
- Nets
- 56
- Pads
- 191
- Tracks, vias
- 451, 151
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 7 Mar 2023
- Updated
- 20 May 2026
Overview
XnetBlockUnit is an open-source printed circuit board by bask185, from the bask185/Train-Science-DIY repository on GitHub. It is a 2-layer board of 51.5 × 74 mm with 57 parts on 56 nets, routed with 451 tracks and 151 vias.
It is built around the ATMEGA328-AU, MAX485ED and EL814, with the MB6S among its other parts. Its parts include 17 resistors, 9 capacitors, 8 diodes, 6 ICs and 5 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATMEGA328-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICs
EL814
DIP-4-55℃~+110℃ 1.2V 11us 20% 200mW 300% 50mV@20mA,1mA 5kV 60mA 7us@2mA,100Ω 80V AC,DC Phototransistor DIP-4 Transistor, Photovoltaic Output Optoisolators ROHSEverlight ElectronicsTransistor, Photovoltaic Output Optoisolators
MB6S
MBS-55℃~+150℃ 1.1V@400mA 1A 35A 5uA@600V 600V Single-Phase Rectifier MBS Bridge Rectifiers ROHSMDDBridge Rectifiers
Parts
57| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | ~ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R701, R702, R703, R704, R801, R802, R803, R804 |
| 4 | ~ | Package_TO_SOT_SMD:SOT-23 | Q701, Q702, Q801, Q802 |
| 4 | ~ | Diode_SMD:D_SMA | D701, D702, D801, D802 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C102, C202, C402 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R301, R302, R303 |
| 3 | MB6S | Package_TO_SOT_SMD:TO-269AA | D101, D501, D601 |
| 2 | 12pF | Capacitor_SMD:C_0603_1608Metric | C201, C203 |
| 2 | 47k | custom_kicad_lib_sk:R_0603_smalltext | R501, R601 |
| 2 | EL814 | Package_SO:SSO-4_6.7x5.1mm_P2.54mm_Clearance8mm | U501, U601 |
| 2 | RJ12 | custom_kicad_lib_sk:RJ12 | J301, J302 |
| 2 | Screw_Terminal_01x08 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J102, J103 |
| 1 | 100R | custom_kicad_lib_sk:R_0603_smalltext | R101 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C301 |
| 1 | 100uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C403 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R202 |
| 1 | 1k | custom_kicad_lib_sk:R_0603_smalltext | R102 |
| 1 | 2000uF | Capacitor_THT:CP_Radial_D8.0mm_P2.50mm | C101 |
| 1 | 330nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C401 |
| 1 | 6k2 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R201 |
| 1 | ATmega328-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U202 |
| 1 | Crystal_GND2 | custom_kicad_lib_sk:crystal_arduino | Y201 |
| 1 | HEADER_3x2 | Connector_PinSocket_1.27mm:PinSocket_2x03_P1.27mm_Vertical | U201 |
| 1 | L78L05_SOT89 | Package_TO_SOT_SMD:SOT-89-3 | U401 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D201 |
| 1 | LOGO | custom_kicad_lib_sk:Train-Science logo small | G*** |
| 1 | MAX485E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U301 |
| 1 | R_Potentiometer | Potentiometer_THT:Potentiometer_Runtron_RM-065_Vertical | RV101 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP101 |
| 1 | sensor | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J101 |
The 53 most common of 57 parts.
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Questions
How big is the XnetBlockUnit PCB?
It measures 51.5 × 74 mm and has 2 copper layers, 1.6 mm thick.
What parts does the XnetBlockUnit use?
57 parts, built around the ATMEGA328-AU, MAX485ED, EL814 and MB6S. 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 XnetBlockUnit KiCad files?
From the bask185/Train-Science-DIY repository on GitHub, at the commit this page was made from: the board is PCB_SOURCE/XnetBlockUnit/XnetBlockUnit.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the XnetBlockUnit design in my own project?
Its repository states no licence, so its author keeps all rights: ask bask185 before reusing the design.