HardLabs

Kamaji

iley·kamaji·pcb/v2/kamaji.kicad_pcb

Kamaji PCB layout, top view — open source AVR/Arduino board by iley
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About the Kamaji PCB

Kamaji is an open source AVR/Arduino PCB design by iley, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 63 components from 36 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. By type, the board carries 23 resistors, 11 capacitors, 8 connectors, 3 transistors, 3 jumpers and 3 switches.

From the project

A quiz game system

See kamaji.cc for assembly instructions and additional information.

firmware: main source code; demo: code samples; 3d: OpenSCAD models for the enclosure; pcb: schematic and printed circuit board layout in KiCAD format; misc`: the rest.

We use PlatformIO with Arduino framework. It should also be possible to compile the code with the official Arduino IDE.

For v1 and v3 custom fuses must be programmed before first flashing.

Main components on the Kamaji

ATMEGA32U4-AU

Kamaji bill of materials (BOM)

63 components, 36 distinct parts.

QtyPartRefs
1
ATMEGA32U4-AU
U1
1
2N3904
Q1
2
IRL540N
Q2, Q3
1
16MHz
Y1
6
RJ10
J1, J2, J3, J4, J5, J6
1
USB_B
J7
1
USB_A
J8
1
LM27313
BC1
1
LCD12864B
DS1
1
1A
F1
1
ICSP
ICSP1
1
Jumper_NO_Small
JP1
1
Jumper_NC_Small
JP2
1
SoundVcc2
JP3
1
Speaker_Crystal
LS1
1
200K
RV1
1
VOLUME
RV2
3
SW_Push
SW1, SW2, SW3
1
LED
D1
1
MBR0540
D2
Show 16 more
QtyPartRefs
1
10uH
L1
1
10uF
C1
2
18pF
C2, C3
5
0.1uF
C4, C5, C6, C10, C11
1
4.7uF
C7
1
2.2uF
C8
1
220pF
C9
2
22R
R1, R2
5
10K
R3, R8, R12, R15, R20
7
220R
R4, R5, R6, R7, R9, R10, R11
1
1K
R13
1
51K
R16
1
13K3
R17
1
100K
R18
1
680R
R19
4
200R
R21, R22, R23, R24

Kamaji design files

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

Kamaji: common questions

What microcontroller does the Kamaji use?

The Kamaji is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the Kamaji PCB?

The Kamaji measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kamaji?

63 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the Kamaji design files?

From the iley/kamaji repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Kamaji design in my own project?

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

Can I test firmware for the Kamaji 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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