HardLabs

Z88 Serial to DB25

BrettHallen·Sinclair·Z88_Serial_DE9-to-DB25/Z88_Serial_DE9-to-DB25.kicad_pcb

Z88 Serial to DB25 PCB layout, top view — open source board by BrettHallen
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About the Z88 Serial to DB25 PCB

Z88 Serial to DB25 is an open source PCB design by BrettHallen, published on GitHub. It is a 2-layer board measuring 14 × 42 mm, with 3 components from 3 distinct parts.

It belongs with the test & measurement designs in this gallery.

From the project

Projects for Sinclair computers (ZX80, ZX81, TS1000, TS1500, TS2068, Spectrum and clones)

To connect to a device with a DB25 plug we need to through-connect the DE9 pins to the equivalent on the DB25 side. Additionally, we need to connect DB25 pin 6 (DSR, data set ready) to the DCD signal.

Note that DB25 pin 1 is Protective Ground (PG) and must not be connected to signal ground.

Z88 side: DE9 male DB25 side: DB25 female

Z88 Serial to DB25, from the project README
From the project README

Z88 Serial to DB25 bill of materials (BOM)

3 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Z88_SERIAL
Z88_Serial
J1
1
DB25_SOCKET
DB25_Socket
J2
1
PG
J3

Z88 Serial to DB25 design files

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

Z88 Serial to DB25: common questions

How big is the Z88 Serial to DB25 PCB?

The Z88 Serial to DB25 measures 14 × 42 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Z88 Serial to DB25?

3 components, from 3 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 Z88 Serial to DB25 design files?

From the BrettHallen/Sinclair 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 Z88 Serial to DB25 design in my own project?

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

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