XnetBlockUnit
About the XnetBlockUnit PCB
XnetBlockUnit is an open source AVR/Arduino PCB design by bask185, published on GitHub. It is a 2-layer board measuring 51.5 × 74 mm, with 52 components from 29 distinct parts.
Its main chip is the ATMEGA328-A, from the AVR/Arduino family. Other key parts include the HEADER_3X2, MAX485E, L78L05_SOT89 and EL814. By type, the board carries 17 resistors, 9 capacitors, 8 diodes, 6 ICs, 5 connectors and 4 transistors.
Main components on the XnetBlockUnit
XnetBlockUnit bill of materials (BOM)
52 components, 29 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | HEADER_3X2 HEADER_3x2 | PinSocket_2x03_P1.27mm_Vertical | U201 |
| 1 | ATMEGA328-A ATmega328-A | TQFP-32_7x7mm_P0.8mm | U202 |
| 1 | MAX485E | SOIC-8_3.9x4.9mm_P1.27mm | U301 |
| 1 | L78L05_SOT89 | SOT-89-3 | U401 |
| 2 | EL814 | SSO-4_6.7x5.1mm_P2.54mm_Clearance8mm | U501, U601 |
| 4 | C20917 ~ | SOT-23 | Q701, Q702, Q801, Q802 |
| 1 | CRYSTAL_GND2 Crystal_GND2 | crystal_arduino | Y201 |
| 1 | sensor | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J101 |
| 2 | SCREW_TERMINAL_01X08 Screw_Terminal_01x08 | TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J102, J103 |
| 2 | RJ12 | RJ12 | J301, J302 |
| 1 | SOLDERJUMPER_2_OPEN SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP101 |
| 1 | R_Potentiometer | Potentiometer_Runtron_RM-065_Vertical | RV101 |
| 3 | MB6S | TO-269AA | D101, D501, D601 |
| 1 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D201 |
| 4 | C8678 ~ | D_SMA | D701, D702, D801, D802 |
| 1 | 2000UF 2000uF | CP_Radial_D8.0mm_P2.50mm | C101 |
| 3 | 100NF 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C102, C202, C402 |
| 2 | 12PF 12pF | C_0603_1608Metric | C201, C203 |
| 1 | 100NF 100nF | C_0603_1608Metric | C301 |
| 1 | 330NF 330nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C401 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100UF 100uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C403 |
| 1 | 100R | R_0603_smalltext | R101 |
| 1 | 1k | R_0603_smalltext | R102 |
| 1 | 6K2 6k2 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R201 |
| 1 | 10K 10k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R202 |
| 3 | 10K 10k | R_0402_1005Metric | R301, R302, R303 |
| 2 | 47K 47k | R_0603_smalltext | R501, R601 |
| 4 | C23345 ~ | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R701, R702, R801, R802 |
| 4 | C25804 ~ | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R703, R704, R803, R804 |
XnetBlockUnit design files
The KiCad project lives in the bask185/Train-Science-DIY repository on GitHub; these links point at the commit this page was built from.
XnetBlockUnit: common questions
What microcontroller does the XnetBlockUnit use?
The XnetBlockUnit is built around the ATMEGA328-A, from the AVR/Arduino family.
How big is the XnetBlockUnit PCB?
The XnetBlockUnit measures 51.5 × 74 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the XnetBlockUnit?
52 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the XnetBlockUnit design files?
From the bask185/Train-Science-DIY repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the XnetBlockUnit design in my own project?
The repository has no license, so all rights stay with bask185. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the XnetBlockUnit without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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