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johannesstrueber·dots·kicad_main/main.kicad_pcb

Main PCB layout, top view — open source AVR/Arduino board by johannesstrueber

About the Main PCB

Main is an open source AVR/Arduino PCB design by johannesstrueber, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 30 × 110.5 mm, with 49 components from 20 distinct parts.

Its main chip is the ATmega328P-AU, from the AVR/Arduino family. Other key parts include the AMS1117-5.0. By type, the board carries 22 resistors, 12 capacitors, 10 diodes, 2 ICs, 2 connectors and 1 crystal.

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

From the project

DOTS eurorack module pcb schematics and code ATMega328 based

DOTS is a compact, 6-channel Eurorack module designed for generating triggers and gates. This open hardware project allows you to build the module yourself, with instructions and resources provided. Please visit the website for more info.

- 6-Channel Trigger/Gate: Generate triggers and gates for your modular system. - Compact Size: Only 6hp wide, making it a handy addition to your setup. - Sync Capabilities: Includes a clock and reset input, allowing it to function as a master or slave. - Visual Feedback: Equipped with a screen and an UI. - Multiple Programs: The firmware features multiple…

Main, from the project README
From the project README

Main components on the Main

ATmega328P-AUAMS1117-5.0

Main bill of materials (BOM)

49 components, 20 distinct parts.

QtyPartRefs
1
ATmega328P-AU
U1
1
AMS1117-5.0
U2
1
Crystal_GND24
Y1
1
Conn_02x05_Odd_Even
J1
1
Conn_02x03_Odd_Even
J10
1
1N5819WS
D1
1
LED
D2
8
BAT54S
D3, D4, D6, D7, D8, D12, D13, D14
5
C 100nF
C1, C2, C3, C4, C7
2
C 20pF
C5, C6
2
C 10uf
C8, C9
1
C 220pF
C10
2
C 10nF
C11, C12
1
R 1K5
R1
9
R 470
R2, R4, R7, R8, R9, R13, R14, R15 +1
2
R 100k
R3, R5
1
R 470Ohm
R6
6
R 33k
R10, R11, R12, R16, R17, R18
2
R 3K3
R19, R20
1
R 10K
R22

Main design files

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

Main: common questions

What microcontroller does the Main use?

The Main is built around the ATmega328P-AU, from the AVR/Arduino family.

How big is the Main PCB?

The Main measures 30 × 110.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main?

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

Where can I download the Main design files?

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

Can I use the Main design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Main 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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