HardLabs

V3

iley·kamaji·pcb/v3/v3.kicad_pcb

V3 PCB layout, top view — open source AVR/Arduino board by iley
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About the V3 PCB

V3 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 45 components from 26 distinct parts.

Its main chip is the ATmega328P-PU, from the AVR/Arduino family. Other key parts include the PCF8574 and RC1602A. By type, the board carries 13 resistors, 10 connectors, 8 capacitors, 3 ICs, 3 switches and 2 transistors.

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 V3

ATmega328P-PUPCF8574RC1602A

V3 bill of materials (BOM)

45 components, 26 distinct parts.

QtyPartRefs
1
ATmega328P-PU
U1
1
PCF8574
U2
1
RC1602A
U3
1
2N3904
Q2
1
BS170
Q3
1
16MHz
Y1
6
RJ10
J1, J3, J4, J5, J6, J7
1
ICSP
J2
1
BOOST
J8
1
USB_B
J9
1
USB_A
J10
1
SND24V
JP1
1
SND5V
JP2
1
Speaker
LS1
1
CONTRAST
RV1
1
VOLUME
RV2
1
CTL1
SW1
1
CTL2
SW2
1
CTL3
SW3
4
0.1uF
C1, C4, C5, C7
Show 6 more
QtyPartRefs
2
20pF
C2, C3
1
20uF
C6
1
10uF
C8
9
1K
R1, R2, R3, R5, R8, R9, R10, R12 +1
2
10K
R4, R19
2
4K7
R6, R7

V3 design files

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

V3: common questions

What microcontroller does the V3 use?

The V3 is built around the ATmega328P-PU, from the AVR/Arduino family.

How big is the V3 PCB?

The V3 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the V3?

45 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the V3 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 V3 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 V3 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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