HardLabs

Alphadisplays

74hc595·kicad-intelligent-displays

Alphadisplays PCB layout, top view — open source AVR/Arduino board by 74hc595

About the Alphadisplays PCB

Alphadisplays is an open source AVR/Arduino PCB design by 74hc595, published on GitHub. It is a 2-layer board measuring 109.2 × 33.7 mm, with 18 components from 17 distinct parts.

Its main chip is the ATmega809-A, from the AVR/Arduino family. By type, the board carries 9 diodes, 2 connectors, 2 switches, 2 capacitors, 2 resistors and 1 IC.

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

From the project

KiCad symbols and footprints for HP/Litronix/Siemens/Osram/Avago/Broadcom intelligent alphanumeric LED displays

KiCad symbols and footprints for 4- and 8-character intelligent segmented/dot-matrix alphanumeric displays like the DL1414, DL2416, HDSP-2112, PDSP1881, etc.

At this time, the library does not include symbols/footprints for the exotic/mil-spec parts.

Some parts, like the PDSP188x and HDSP-2xxx, do not have pins in all positions. To facilitate the use of regular DIP sockets and single inline pin sockets, alternative footprints have been provided for these parts that have holes in all positions. (they end with a DIPxx suffix)

Alphadisplays, from the project README
From the project README

Main components on the Alphadisplays

ATmega809-A

Alphadisplays bill of materials (BOM)

18 components, 17 distinct parts.

QtyPartRefs
1
ATmega809-A
U1
1
FTDI 5V
J1
1
Screw_Terminal_01x02
J2
2
SW_SPST
SW1, SW2
1
DL1414
D1
1
DL1416
D2
1
DL2416
D3
1
DL3416
D4
1
DL1814
D5
1
HDSP-250x
D6
1
PDSP188x
D7
1
PD2816
D8
1
1206 LED
D9
1
0.1uF
C1
1
10uF
C2
1
4.7k
R1
1
1k
R2

Alphadisplays design files

The KiCad project lives in the 74hc595/kicad-intelligent-displays repository on GitHub; these links point at the commit this page was built from.

Alphadisplays: common questions

What microcontroller does the Alphadisplays use?

The Alphadisplays is built around the ATmega809-A, from the AVR/Arduino family.

How big is the Alphadisplays PCB?

The Alphadisplays measures 109.2 × 33.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Alphadisplays?

18 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Alphadisplays design files?

From the 74hc595/kicad-intelligent-displays repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Alphadisplays design in my own project?

The repository has no license, so all rights stay with 74hc595. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Alphadisplays without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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