HardLabs

Elec dice

pierreblavy2·elec-dice·kicad/de.kicad_pcb

Elec dice PCB layout, top view — open source AVR/Arduino board by pierreblavy2

About the Elec dice PCB

Elec dice is an open source AVR/Arduino PCB design by pierreblavy2, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 127 × 94 mm, with 52 components from 10 distinct parts.

Its main chip is the ATtiny85-20PU, from the AVR/Arduino family. By type, the board carries 3 diodes and 1 battery holder.

From the project

An electronic dice on attiny85, including PCB

(1) This component is not referenced properly, I've found mine here https://www.aliexpress.com/item/32789971588.html but any pin compatible 5V step up will do the trick. The PCB was designed with extra space arount the 5V step up module, so you can easily edit it to use an other kind of module. The module looks like this.

(2) The 330 Ohms resistors are used to protect the 05611AH diodes. You must choose their value according to the kind of led you're using, and the desired brightness. The formula is R=(5-Vf)/If. Vf is the forward voltage of a single LCD segment, If is the segment forward…

Elec dice, from the project README
From the project README

Elec dice bill of materials (BOM)

52 components, 10 distinct parts.

QtyPartRefs
1
ATtiny85-20PU
AT1
1
Battery
BT1
8
D
D_sA1, D_sB1, D_sC1, D_sD1, D_sE1, D_sF1, D_sG1, D_sH1
1
5V_OSJK
PW1
24
330
RA1, RA2, RA3, RB1, RB2, RB3, RC1, RC2 +16
1
10K
R_SW1
8
SW_Push
SW_sA1, SW_sB1, SW_sC1, SW_sD1, SW_sE1, SW_sF1, SW_sG1, SW_sH1
1
SW_SPDT
S_PW1
4
74HC595
UD_2, U_D1, U_D3, U_SW1
3
05611AH
D1, D2, D3

Elec dice design files

The KiCad project lives in the pierreblavy2/elec-dice repository on GitHub; these links point at the commit this page was built from.

Elec dice: common questions

What microcontroller does the Elec dice use?

The Elec dice is built around the ATtiny85-20PU, from the AVR/Arduino family.

How big is the Elec dice PCB?

The Elec dice measures 127 × 94 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Elec dice?

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

Where can I download the Elec dice design files?

From the pierreblavy2/elec-dice repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Elec dice design in my own project?

Yes, under the terms of its GPL-3.0 license, which pierreblavy2 chose for the repository.

Can I test firmware for the Elec dice 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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