HardLabs

Viper

isol33t·viper·hardware/viper/viper.kicad_pcb

Viper PCB layout, top view — open source AVR/Arduino board by isol33t

About the Viper PCB

Viper is an open source AVR/Arduino PCB design by isol33t, published on GitHub under the MIT license. It is a 2-layer board measuring 285 × 95.1 mm, with 290 components from 25 distinct parts.

Its main chip is the ATmega32U4-M, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6. By type, the board carries 69 LEDs, 65 switches, 62 diodes, 62 resistors, 2 ICs and 2 capacitors.

It belongs with the keyboards designs in this gallery.

From the project

duck viper v1 pcb

⚠️ Work in Progress - This project is currently under development

Inspired by Automated keyboard PCB design with ergogen and kbplacer by adamws & its dockerfile.

An open-source PCB design for the Duck Viper v1 keyboard with hardware upgrades. This project focuses on transparency and community collaboration while building upon existing open-source resources.

Disclaimer: I'm not an electrical engineer - this project represents my attempt at "putting the parts together" using available community resources, guides, and libraries. Community feedback and contributions are greatly appreciated!

Viper, from the project README
From the project README

Main components on the Viper

ATmega32U4-MUSBLC6-2SC6

Viper bill of materials (BOM)

290 components, 25 distinct parts.

QtyPartRefs
1
ATmega32U4-M
U1
1
USBLC6-2SC6
U2
1
AO3400A
Q1
1
16MHz
Y1
1
TYPE-C-31-M-12
J1
3
100nF
CB1, CB2, CB3
1
10uF
CB4
4
100nF
CRGB1, CRGB2, CRGB3, CRGB4
2
4.7nF
CSH1, CSH2
2
22pF
CX1, CX2
2
SMF9.0CA
DF1, DSH1
1
1.5A trip PTC
F1
2
5.1k
RCC1, RCC2
2
22
RD1, RD2
2
10k
RHWB1, RRST1
1
1k
RPB1
2
1M
RSH1, RSH2
1
SW_SPST
RST1
65
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +57
65
LED
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +57
Show 5 more
QtyPartRefs
4
WS2812B
RGB1, RGB2, RGB3, RGB4
62
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +54
1
1uF
C3
1
100nF
C4
62
470
R1, R2, R3, R4, R5, R6, R7, R8 +54

Viper design files

The KiCad project lives in the isol33t/viper repository on GitHub; these links point at the commit this page was built from.

Viper: common questions

What microcontroller does the Viper use?

The Viper is built around the ATmega32U4-M, from the AVR/Arduino family.

How big is the Viper PCB?

The Viper measures 285 × 95.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Viper?

290 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Viper design files?

From the isol33t/viper repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Viper design in my own project?

Yes, under the terms of its MIT license, which isol33t chose for the repository.

Can I test firmware for the Viper 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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