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Hermes-Lite DB9 Adapter

softerhardware·Hermes-Lite2·hardware/companions/db9/db9.kicad_pcb

Hermes-Lite DB9 Adapter PCB layout, top view — open source board by softerhardware
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About the Hermes-Lite DB9 Adapter PCB

Hermes-Lite DB9 Adapter is an open source PCB design by softerhardware, published on GitHub. It is a 2-layer board measuring 28.1 × 15 mm, with 9 components from 6 distinct parts.

By type, the board carries 4 connectors, 2 transistors and 2 resistors.

It belongs with the rf & radio designs in this gallery.

From the project

A second generation low-cost amateur HF software defined radio transceiver.

The BOM below lists possible options for the DB9 adapter board. The builder should choose what components they need to buy and install.

Please refer to the schematic during assembly. Please refer to the HR50 interface notes found on the IO wiki page for details on how to use this with the HR50.

Below is a picture of an assembled DB-9 IO board. Only one of the level shifter channels is installed, TX on pin 3 of the DB-9. This is all the that HR50 requires. The other level shifter can be installed if RX is required.

Hermes-Lite DB9 Adapter, from the project README
From the project README

Hermes-Lite DB9 Adapter bill of materials (BOM)

9 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
DMP3099L-7
BSS138
Q1
1
NUD3124LT1G
BSS138
Q2
3
edge10
J1, J2, J4
1
DB9_Male
J3
1
break10
B1
2
10K
R1, R2

Hermes-Lite DB9 Adapter design files

The KiCad project lives in the softerhardware/Hermes-Lite2 repository on GitHub; these links point at the commit this page was built from.

Hermes-Lite DB9 Adapter: common questions

How big is the Hermes-Lite DB9 Adapter PCB?

The Hermes-Lite DB9 Adapter measures 28.1 × 15 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hermes-Lite DB9 Adapter?

9 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 Hermes-Lite DB9 Adapter design files?

From the softerhardware/Hermes-Lite2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Hermes-Lite DB9 Adapter design in my own project?

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

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