Contrast
About the Contrast PCB
Contrast is an open source PCB design by evietron, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 38.2 × 31 mm, with 11 components from 10 distinct parts.
Other key parts include the XC6206. By type, the board carries 4 jumpers, 2 connectors, 2 capacitors, 1 IC and 1 resistor.
It belongs with the retro computing designs in this gallery.
From the project
Open Source Hardware for Vintage Computers
These are some hardware devices that I use for my vintage machines. I used to sell some of these, but I no longer have the bandwidth to build these specfic items so I have made the designs open-source. Designs may have been derived from various information I scrubbed from the internet, but layouts are my own. Feel free to make your own builds, modifications, or to ask me questions about how to build.
Main components on the Contrast
Contrast bill of materials (BOM)
11 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC6206 74LS00 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | DISPLAY | PinHeader_2x10_P2.54mm_Vertical_SMD | J1 |
| 1 | MOTHERBOARD | PinSocket_2x10_P2.54mm_Vertical_SMD | J2 |
| 1 | NO ADJUST | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | FONT_VCC | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP2 |
| 1 | FONT_GND | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
| 1 | FONT_MB | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
| 1 | CONTRAST | Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 2 | 100NF 0.1uF | C_0603_1608Metric | C1, C2 |
| 1 | 10K | R_0603_1608Metric | R1 |
Contrast design files
The KiCad project lives in the evietron/BackBit-OpenSource repository on GitHub; these links point at the commit this page was built from.
Contrast: common questions
How big is the Contrast PCB?
The Contrast measures 38.2 × 31 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Contrast?
11 components, from 10 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 Contrast design files?
From the evietron/BackBit-OpenSource 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 Contrast design in my own project?
Yes, under the terms of its GPL-3.0 license, which evietron chose for the repository.
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