VIA Plus
About the VIA Plus PCB
VIA Plus is an open source PCB design by demik, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 77.5 × 44.7 mm, with 18 components from 11 distinct parts.
Other key parts include the LF347, OPA1688, 74LS244 and 74LS161. By type, the board carries 8 resistors, 5 ICs and 4 capacitors.
It belongs with the retro computing designs in this gallery.
From the project
Development ressources for Old World Macintosh (68k and NuBus PPC) and a few related things…
Pins labelled on top of the PCB. Includes 6522 PLCC adapter
Both RTC and VSYNC pulses are displayed using the decimal point LED. A 1Hz blink would implies that only the RTC is working, a 3.75 Hz blink would implies that only the VSYNC is working and there is some RTC related issues. Under normal operation both pulses are interleaved (looks like a random pulsing)
Main components on the VIA Plus
VIA Plus bill of materials (BOM)
18 components, 11 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LF347 WD65C22 | DIP-40_W15.24mm | U1 |
| 1 | LF347 WD65C22 | PLCC-44_THT-Socket | U2 |
| 1 | OPA1688 GAL16V8 | DIP-20_W7.62mm | U3 |
| 1 | 74LS244 | DIP-20_W7.62mm | U4 |
| 1 | 74LS161 | DIP-16_W7.62mm | U5 |
| 1 | LDS-A3502RD-SUG | LDS-A3502RD-SUG | DS1 |
| 4 | 100NF 100nF | C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C1, C2, C3, C4 |
| 2 | 470Ω | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 10K 470Ω | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R5 |
| 2 | 20K 470Ω | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R6 |
| 2 | 680 470Ω | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8 |
VIA Plus design files
The KiCad project lives in the demik/oldworld repository on GitHub; these links point at the commit this page was built from.
VIA Plus: common questions
How big is the VIA Plus PCB?
The VIA Plus measures 77.5 × 44.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the VIA Plus?
18 components, from 11 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 VIA Plus design files?
From the demik/oldworld 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 VIA Plus design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which demik chose for the repository.
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