Waferspace cob
About the Waferspace cob PCB
Waferspace cob is an open source PCB design by wafer-space, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 100 × 100 mm, with 12 components from 6 distinct parts.
Other key parts include the Caravel_COB. By type, the board carries 6 connectors, 3 ICs and 3 jumpers.
From the project
Wire bonded chip on board PCB designs.
Over the past few weeks we have been considering a number of different designs.
There are some projects that require a high pin count. In an effort to keep prices down and use components that are widely available the current highest choice option seems to be an LGA (Land Grid Array). The current version has 100 user pins--even though the default pad frame will contain only 73 wire bonds this will enable extra ground and power pads for analog and other signals that benefit from close proximity.
Main components on the Waferspace cob
Waferspace cob bill of materials (BOM)
12 components, 6 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Caravel_COB | caravel_gfmpw_1_0_asap | U101 |
| 1 | Caravel_COB | waferspace_default_padring_v0 | U102 |
| 1 | Caravel_COB | LGA1 | U104 |
| 4 | Conn_01x12 | castellated_1mmx12 | J101, J102, J103, J104 |
| 2 | Conn_01x20 | castellated_2.54x20 | J105, J106 |
| 3 | Jumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP101, JP102, JP103 |
Waferspace cob design files
The KiCad project lives in the wafer-space/chip-on-board-wire-bonded-pcbs repository on GitHub; these links point at the commit this page was built from.
Waferspace cob: common questions
How big is the Waferspace cob PCB?
The Waferspace cob measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Waferspace cob?
12 components, from 6 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 Waferspace cob design files?
From the wafer-space/chip-on-board-wire-bonded-pcbs 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 Waferspace cob design in my own project?
Yes, under the terms of its Apache-2.0 license, which wafer-space chose for the repository.
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