HardLabs

Scrambler

artichoked1·Scrambler·pcb/kicad/scrambler.kicad_pcb

Scrambler PCB layout, top view — open source AVR/Arduino board by artichoked1

About the Scrambler PCB

Scrambler is an open source AVR/Arduino PCB design by artichoked1, published on GitHub. It is a 2-layer board measuring 45 × 55 mm, with 20 components from 16 distinct parts.

Its main chip is the ATmega328-P, from the AVR/Arduino family. Other key parts include the MCP73831-2-OT. By type, the board carries 5 switches, 5 capacitors, 3 connectors, 3 resistors, 2 ICs and 1 battery holder.

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

From the project

Rubik's Cube scramble generator as a handheld device!

I go to a school where speed-cubing is popular and a no-phones policy is enforced during lunch break. This device consists of a cutom-designed PCB with a 128x64 OLED display and an ATMega328P chip and generates a random scramble algorithm speedcubing solves can be fair, consistent and retain a level of officiality without the need for a phone app to generate the scrambles.

Main components on the Scrambler

MCP73831-2-OTATmega328-P

Scrambler bill of materials (BOM)

20 components, 16 distinct parts.

QtyPartRefs
1
MCP73831-2-OT
U1
1
ATmega328-P
U2
1
Conn_01x04_Male
J1
1
AVR-ISP-6
J2
1
USB_B_Micro
J3
1
3.7V
BT1
1
RESET
SW1
1
SW_SPDT
SW2
3
SW_Push
SW3, SW4, SW5
1
LED
D1
2
4.7uF
C1, C2
2
C
C3, C4
1
C_Polarized
C5
1
2k
R1
1
1k
R2
1
10K
R3

Scrambler design files

The KiCad project lives in the artichoked1/Scrambler repository on GitHub; these links point at the commit this page was built from.

Scrambler: common questions

What microcontroller does the Scrambler use?

The Scrambler is built around the ATmega328-P, from the AVR/Arduino family.

How big is the Scrambler PCB?

The Scrambler measures 45 × 55 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Scrambler?

20 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Scrambler design files?

From the artichoked1/Scrambler repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Scrambler design in my own project?

The repository has no license, so all rights stay with artichoked1. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Scrambler 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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