HardLabs

Koyomi lvds hat

exentio·koyomi-lvds-hat

Koyomi lvds hat layout, top view — open source board by exentio

About the Koyomi lvds hat

Koyomi lvds hat is an open source PCB design by exentio, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 65 × 56.5 mm, with 23 components from 12 distinct parts.

Other key parts include the SN75LVDS83B and AP2114H-2.5. By type, the board carries 8 capacitors, 8 resistors, 3 connectors and 2 ICs.

It belongs with the displays & leds and dev boards & breakouts designs in this gallery.

From the project

Raspberry Pi hat to test Vaio P displays

This is the first part of the development of Project Koyomi, read this blog post for more. The purpose of this Raspberry Pi hat is to test and play around with the display of the Vaio P before further development of the motherboard.

The board is currently tested and working as shown here!

The board uses Texas Instruments' SN75LVDS83B LVDS transmitter using the Pi's DPI signals to send video out to the display. The final motherboard will use a DVI receiver to free up the Raspberry's GPIO, a small converter board is in development and you can find it here.

Main components on the Koyomi lvds hat

SN75LVDS83BAP2114H-2.5

Koyomi lvds hat bill of materials (BOM)

23 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN75LVDS83B
IC1
1
AP2114H-2.5
U1
1
C2685092
RPi_GPIO
J1
1
20374-R30E-31
J2
1
C160404
qwiic
J4
2
DLP2ADN121HL4L
FL1, FL2
2
1UF
1uF
C1, C4
2
100NF
100nF
C2, C5
2
10NF
10nF
C3, C6
2
4.7UF
4.7uF
C7, C8
2
4.7K
R1, R2
6
47
RN1, RN2, RN3, RN4, RN5, RN6

Koyomi lvds hat design files

The KiCad project lives in the exentio/koyomi-lvds-hat repository on GitHub; these links point at the commit this page was built from.

Koyomi lvds hat: common questions

How big is the Koyomi lvds hat?

The Koyomi lvds hat measures 65 × 56.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Koyomi lvds hat?

23 components, from 12 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 Koyomi lvds hat design files?

From the exentio/koyomi-lvds-hat 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 Koyomi lvds hat design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which exentio chose for the repository.

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