HardLabs

TCPU8-Alpha

halfburnttoast·TCPU8-Alpha

TCPU8-Alpha PCB layout, top view — open source AVR/Arduino board by halfburnttoast
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About the TCPU8-Alpha PCB

TCPU8-Alpha is an open source AVR/Arduino PCB design by halfburnttoast, published on GitHub under the GPL-2.0 license. It is a board measuring 150 × 150 mm, with 138 components from 47 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the 74LS08, 74HC04, 74LS32, 74LS165 and 74LS161. By type, the board carries 38 capacitors, 34 ICs, 26 resistors, 14 switches, 11 diodes and 4 connectors.

From the project

Discontinued computer I made in 2020

Main components on the TCPU8-Alpha

74LS0874HC0474LS3274LS16574LS161L780574HC27374LS8674HC7474LS28374HC24574F52174HC595UM61256A74HC0074LS157Arduino_Nano_v3.x

TCPU8-Alpha bill of materials (BOM)

138 components, 47 distinct parts.

QtyPartRefs
2
74LS08
U1, U10
2
74HC04
U2, U9
1
74LS32
U3
4
74LS165
U4, U6, U28, U29
3
74LS161
U5, U23, U24
1
L7805
U7
3
74HC273
U8, U14, U25
2
74LS86
U11, U12
1
74HC74
U13
2
74LS283
U15, U16
4
74HC245
U17, U26, U27, U34
1
74F521
U18
3
74HC595
U19, U20, U21
1
UM61256A
U22
2
74HC00
U30, U31
2
74LS157
U32, U33
1
Arduino_Nano_v3.x
A1
1
Screw_Terminal_01x02
J1
2
Conn_01x02
J2, J3
1
Conn_02x06_Odd_Even
J4
Show 27 more
QtyPartRefs
1
PC
BAR1
4
HDSP-4830_2
BAR2, BAR3, BAR4, BAR5
2
DATA BUS
BAR6, BAR7
1
CLK_ENABLE
CLK_ENABLE1
1
SW_Push
LOADA1
1
PGM
PGM1
5
SW_Push
SW1, SW2, SW3, SW4, SW5
1
D0
SW6
1
D1
SW7
1
D2
SW8
1
D3
SW9
1
D4
SW10
1
D5
SW11
1
D6
SW12
1
D7
SW13
1
SW_SPDT
SW14
1
D_Schottky
D1
2
LED
D2, D3
8
LED
D4, D5, D6, D7, D8, D9, D10, D11
1
10u
C1
1
100u
C2
28
100n
C3, C4, C5, C6, C7, C8, C9, C10 +20
2
100uF
C31, C38
6
100n
C32, C33, C34, C35, C36, C37
14
1K
R1, R2, R3, R4, R5, R6, R7, R8 +6
5
1K
R13, R15, R16, R17, R18
7
R_Network08
RN1, RN2, RN3, RN4, RN5, RN6, RN7

TCPU8-Alpha design files

The KiCad project lives in the halfburnttoast/TCPU8-Alpha repository on GitHub; these links point at the commit this page was built from.

TCPU8-Alpha: common questions

What microcontroller does the TCPU8-Alpha use?

The TCPU8-Alpha is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the TCPU8-Alpha PCB?

The TCPU8-Alpha measures 150 × 150 mm and is 1.6002 mm thick.

How many components are on the TCPU8-Alpha?

138 components, from 47 distinct parts. The full bill of materials is listed on this page.

Where can I download the TCPU8-Alpha design files?

From the halfburnttoast/TCPU8-Alpha repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TCPU8-Alpha design in my own project?

Yes, under the terms of its GPL-2.0 license, which halfburnttoast chose for the repository.

Can I test firmware for the TCPU8-Alpha 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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