HardLabs

8bit

Haxintosh·8bit

8bit PCB layout, top view — open source AVR/Arduino board by Haxintosh

About the 8bit PCB

8bit is an open source AVR/Arduino PCB design by Haxintosh, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 214.7 × 238.3 mm, with 468 components from 30 distinct parts.

Its main chip is the ATMEGA328-P, from the AVR/Arduino family. Other key parts include the 74LS04, 74LS08, 74LS02, 74LS161 and 74LS245. By type, the board carries 206 resistors, 184 diodes, 76 ICs and 1 connector.

From the project

8bit computer!

Main components on the 8bit

74LS0474LS0874LS0274LS16174LS24574LS19374LS13874LS20HM62256BLPKM28C64A74LS57374LS181ATMEGA328-PD198K27C51274LS00

8bit bill of materials (BOM)

468 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74LS04
74LS573
U1
1
74LS08
74LS573
U2
1
74LS08
74LS245
U3
1
74LS02
74LS245
U4
5
74LS161
U5, U6, U7, U8, U61
21
74LS245
U9, U10, U15, U16, U20, U21, U23, U25 +13
8
74LS193
U11, U12, U13, U14, U26, U27, U48, U49
1
74LS138
U17
1
74LS20
U18
1
HM62256BLP
U19
1
KM28C64A
U22
9
74LS573
U24, U32, U36, U38, U42, U43, U54, U55 +1
2
74LS181
U28, U29
1
74LS245
74LS373
U31
8
74LS08
U33, U69, U71, U72, U73, U74, U75, U76
2
74LS02
U34, U62
1
74LS04
U35
1
ATMEGA328-P
ATmega328-P
U56
4
D198K
U57, U58, U59, U60
4
27C512
U63, U64, U65, U66
Show 10 more
QtyPartRefs
1
74LS00
U68
1
74LS245
74LS08
U70
1
CF
J1
1
WC1602A
DS1
184
LED
D1, D2, D3, D4, D5, D6, D7, D8 +176
20
470
R1, R2, R3, R4, R5, R6, R7, R8 +12
164
470
R17, R18, R19, R20, R21, R22, R23, R24 +156
16
1k
R69, R71, R73, R75, R77, R79, R81, R83 +8
5
0
R197, R198, R199, R200, R202
1
4.7K
4.7k
R203

8bit design files

The KiCad project lives in the Haxintosh/8bit repository on GitHub; these links point at the commit this page was built from.

8bit: common questions

What microcontroller does the 8bit use?

The 8bit is built around the ATMEGA328-P, from the AVR/Arduino family.

How big is the 8bit PCB?

The 8bit measures 214.7 × 238.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 8bit?

468 components, from 30 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 8bit design files?

From the Haxintosh/8bit repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the 8bit design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which Haxintosh chose for the repository.

Can I test firmware for the 8bit 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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