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Userport expander

djtulan·userport_expander·kicad/userport_expander.kicad_pcb

Userport expander PCB layout, top view — open source board by djtulan
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About the Userport expander PCB

Userport expander is an open source PCB design by djtulan, published on GitHub. It is a 2-layer board measuring 64.3 × 98 mm, with 10 components from 6 distinct parts.

Other key parts include the 4042 and 8255. By type, the board carries 5 connectors, 2 ICs, 2 diodes and 1 resistor.

It belongs with the retro computing designs in this gallery.

From the project

Commodore 64, C64, Userport Expander

You can find the scan (german language) here.

The C64 Userport Expander expands the C64 Userport from 8 Bit to 3x8bit.

Please feel free to order your own PCBs, Gerber files are here "gerber".

I would be pleased about a small donation: PAYPAL.ME

Userport expander, from the project README
From the project README

Main components on the Userport expander

40428255

Userport expander bill of materials (BOM)

10 components, 6 distinct parts.

QtyPartRefs
1
4042
U1
1
8255
U2
1
C64-UserPort
J1
4
Screw_Terminal_01x08
J2, J3, J4, J5
2
1N4148
D1, D2
1
R10k
R1

Userport expander design files

The KiCad project lives in the djtulan/userport_expander repository on GitHub; these links point at the commit this page was built from.

Userport expander: common questions

How big is the Userport expander PCB?

The Userport expander measures 64.3 × 98 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Userport expander?

10 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Userport expander design files?

From the djtulan/userport_expander repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Userport expander design in my own project?

The repository has no license, so all rights stay with djtulan. Use it as a reference, and ask the author before reusing the design.

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