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Led display

eshazen·retro-25·hardware/led-display/Rev1/led-display.kicad_pcb

Led display PCB layout, top view — open source board by eshazen

About the Led display PCB

Led display is an open source PCB design by eshazen, published on GitHub. It is a 2-layer board measuring 116.8 × 172.7 mm, with 74 components from 10 distinct parts.

Other key parts include the ICM7218A and LTC-4627JR. By type, the board carries 32 switches, 31 diodes, 5 ICs, 3 capacitors, 2 connectors and 1 resistor.

It belongs with the retro computing and displays & leds designs in this gallery.

From the project

Retro-tech HP-25 calculator clone using Z80

This is branch "ScopeClock". Building up another CPU board for used as a general purpose computer for the scope clock, along with the DAC/Interface board from that project, which (whew!) has an actual UART for the serial port.

Time for something new! The VFD HP-25 is cool and all, but I've lusted after an HP-97 most of my life, plus I love nixie tubes! Starting to think about a nixie-display HP-97 emulator. Probably no card reader, but a small printer is certainly doable. Inspiration from Oliver De Smet (archived elswhere in this repository just in case):

Led display, from the project README
From the project README

Main components on the Led display

ICM7218ALTC-4627JR

Led display bill of materials (BOM)

74 components, 10 distinct parts.

QtyPartRefs
2
ICM7218A
U1, U4
3
LTC-4627JR
U2, U3, U5
2
C2x8100
J1, J2
2
SW_SPST
SW1, SW2
29
MX1A-C1NW
SW3, SW4, SW6, SW7, SW8, SW9, SW10, SW11 +21
1
MX1A-C1NW
SW5
1
LED
D1
30
1N914
D2, D3, D4, D5, D6, D7, D8, D9 +22
3
0.1uF
C1, C2, C3
1
470
R1

Led display design files

The KiCad project lives in the eshazen/retro-25 repository on GitHub; these links point at the commit this page was built from.

Led display: common questions

How big is the Led display PCB?

The Led display measures 116.8 × 172.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Led display?

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

Where can I download the Led display design files?

From the eshazen/retro-25 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Led display design in my own project?

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

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