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Bonsai

Retne01·Bonsai

Bonsai PCB layout, top view — open source AVR/Arduino board by Retne01

About the Bonsai PCB

Bonsai is an open source AVR/Arduino PCB design by Retne01, published on GitHub. It is a 2-layer board measuring 348.5 × 165.6 mm, with 191 components from 26 distinct parts.

Its main chip is the ATmega32A-PU, from the AVR/Arduino family. By type, the board carries 87 LEDs, 85 diodes, 6 resistors, 5 capacitors, 1 IC and 1 crystal.

From the project

This is a THT 75% take on the TGR Alice layout.

If you want to put one together for yourself you can follow the guide for the FR4 sandwich style pictured above you can follow the guide here If you would prefer to make an acrylic style case as pictured below you can follow the guide here.

Bonsai, from the project README
From the project README

Main components on the Bonsai

ATmega32A-PU

Bonsai bill of materials (BOM)

191 components, 26 distinct parts.

QtyPartRefs
1
ATmega32A-PU
U1
1
Crystal
Y1
1
AVR-ISP-6
J1
1
BOOT
BOOT1
1
500mA
F1
1
LOGO
G01
1
RESET
RESET1
1
USB_C_Receptacle_USB2.0
USB1
70
SW_Push
SW_1, SW_2, SW_3, SW_4, SW_5, SW_6, SW_7, SW_8 +62
1
SW_Push
SW_BKSP1
2
SW_Push
SW_CPLK1, SW_RSHFT1
5
SW_Push
SW_CPLKSTPD1, SW_FN2, SW_LCTRL1, SW_RCTRL1, SW_WIN1
2
SW_Push
SW_ENT1, SW_LSHFT1
4
SW_Push
SW_LALT1, SW_RALT1, SW_TAB1, SW_|1
1
SW_Push
SW_LSPC1
1
SW_Push
SW_LSPC2
1
SW_Push
SW_RSPC1
83
D
D0, D1, D2, D3, D4, D5, D6, D7 +75
2
3.6v
D82, D83
2
22p
C1, C2
Show 6 more
QtyPartRefs
1
4.7u
C3
2
0.1u
C4, C5
1
1.5k
R1
2
75R
R2, R3
2
5.1k
R4, R5
1
10k
R6

Bonsai design files

The KiCad project lives in the Retne01/Bonsai repository on GitHub; these links point at the commit this page was built from.

Bonsai: common questions

What microcontroller does the Bonsai use?

The Bonsai is built around the ATmega32A-PU, from the AVR/Arduino family.

How big is the Bonsai PCB?

The Bonsai measures 348.5 × 165.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bonsai?

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

Where can I download the Bonsai design files?

From the Retne01/Bonsai repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Bonsai design in my own project?

The repository has no license, so all rights stay with Retne01. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Bonsai 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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