Assoc board
About the Assoc board
Assoc board is an open source PCB design by leoheck, published on GitHub. It is a 4-layer board measuring 72 × 46.5 mm, with 44 components from 24 distinct parts.
Other key parts include the ASSoC, LM1117-1.8 and LM1117-3.3. By type, the board carries 19 capacitors, 7 connectors, 6 resistors, 3 ICs, 3 jumpers and 2 transistors.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Evaluation board for the ASSoC IC
Small and simple evaluation board for the ASSoC IC. ASSoC IC private project can be accessed here.
The IC is accessible through a USB-Serial dongle connected to the computer. The default symbol rate for 25 MHz clock is 11520 Bd (baud rate).
- Board Schematics - Layout and Interactive BOM - Assembly Bill of Materials - Production files Release-0.1
The library in this project is a git submodule. Update/clone the library with the following command:
Main components on the Assoc board
Assoc board bill of materials (BOM)
44 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ASSoC | PLCC-68_THT-Socket | U1 |
| 1 | LM1117-1.8 | SOT-223 | U2 |
| 1 | LM1117-3.3 | SOT-223 | U3 |
| 2 | Q_NPN_BCE | SOT-23 | Q1, Q2 |
| 1 | 25 MHz | Crystal_HC49-4H_Vertical | Y1 |
| 1 | H3 | PinSocket_1x12_P2.54mm_Vertical | J1 |
| 1 | USB-UART | PinHeader_1x04_P2.54mm_Horizontal | J2 |
| 1 | H2 | PinSocket_1x12_P2.54mm_Vertical | J3 |
| 1 | H1 | PinSocket_1x08_P2.54mm_Vertical | J4 |
| 1 | PWR | PinSocket_1x06_P2.54mm_Vertical | J5 |
| 1 | DL | PinSocket_1x02_P2.54mm_Vertical | J6 |
| 1 | H4 | PinSocket_1x05_P2.54mm_Vertical | J7 |
| 1 | SOLDERJUMPER_2_BRIDGED SolderJumper_2_Bridged | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | T.SE | SolderJumper-3_P1.3mm_Bridged2Bar12_RoundedPad1.0x1.5mm | JP2 |
| 1 | T.TM | SolderJumper-3_P1.3mm_Bridged2Bar12_RoundedPad1.0x1.5mm | JP3 |
| 1 | RESET | SW_PUSH_6mm | SW1 |
| 1 | 1V8_ON 1V8_On | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | 3V3_ON 3V3_On | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 13 | 100N 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 +5 |
| 4 | 10U 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13, C14, C15, C16 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 18P 18p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17, C18 |
| 2 | 330 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 3 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5, R6 |
Assoc board design files
The KiCad project lives in the leoheck/assoc-board repository on GitHub; these links point at the commit this page was built from.
- Layoutboard.kicad_pcb
- Schematicboard.kicad_sch
- BOMboard-bom.csv
Assoc board: common questions
How big is the Assoc board?
The Assoc board measures 72 × 46.5 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Assoc board?
44 components, from 24 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 Assoc board design files?
From the leoheck/assoc-board 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 Assoc board design in my own project?
The repository has no license, so all rights stay with leoheck. Use it as a reference, and ask the author before reusing the design.
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