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17.2k
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112
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27
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102
NEDONAND is 8-bit homebrew computer entirely built out of many 74F00 chips (2-input NAND gates)
Project Owner Contributor

NEDONAND homebrew computer

Shaos

eye
40.2k
users
204
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22
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98
This project is an attempt to teach myself about the inner workings of computers. Naturally I started from the bottom up.
eye
18.1k
users
162
comment
8
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90
After the apocalypse we have to build computers from stuff we can make at home, I.E Transistors, diodes and resistors.
Project Owner Contributor

AYTABTU - Discrete Computer

matseng

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28.1k
users
120
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5
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89
Creating the worlds first 32 bit homebrew CPU using 74' series logic.
Project Owner Contributor

Worlds first 32 bit Homebrew CPU

Phil Wright

eye
5.4k
users
223
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My goal is a 4-bit CPU using recycled cardboard substrate and Diode Transistor Logic. This will develop into an educational platform for me.
eye
11.1k
users
128
comment
27
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61
ED-64 will be an 8-bit computer built with discrete components, and will feature a ferrite core memory (documented as a separate project).
eye
4.6k
users
90
comment
3
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52
Another DIY 4-bit computer
Project Owner Contributor

Fourbit

jaromir.sukuba

eye
8.9k
users
56
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10
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50
a 16-bits YASEP computer (mostly) made of DIP/SOIC chips like in the 70s and 80s... with 2010's twists!
Project Owner Contributor

Discrete YASEP

Yann Guidon / YGDES

eye
1.3k
users
120
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14
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48
Fork of #AMBAP, here I discuss about the physical implementation of the bitslice architecture with russian РЭС15 (see what I did here?)
eye
7k
users
246
comment
24
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46
A computer invented, designed and built from scratch.
Project Owner Contributor

A2Z Computer

f4hdk

eye
3k
users
23
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18
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41
Trying to unify and simplify a minimal architecture for various implementation technologies...
eye
3.5k
users
39
comment
5
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A minimal 8 bit TTL CPU using 1970s technology
Project Owner Contributor

Weird CPU

agp.cooper

eye
3.6k
users
78
comment
3
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35
Each custom CPU is a stack machine. Parallel computation is via shared memory. I wrote a stack language compiler for the CPU.
eye
5.5k
users
42
comment
5
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"Just because"
eye
6.3k
users
88
comment
5
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32
[Redesign]: A 16 bit RISC processor built with a logic simulator
Project Owner Contributor

16-bit CPU built in Logisim

Reed Foster

eye
6.5k
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33
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Let's imagine I could get about 200 SPDT relays. Of course I would know what to do with them :-D But will 200 be enough ?
eye
1.6k
users
36
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15
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Scientific calculator with a brain built out of relays.
Project Owner Contributor

RISC Relay CPU

roelh

eye
4.9k
users
32
comment
11
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26
A usable 4 bit TTL CPU
Project Owner Contributor

4 Bit TTL CPU

agp.cooper

eye
1.2k
users
303
comment
9
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25
A relay computer on hat rails Big loud relays, Turing complete, NO f**king diodes
Project Owner Contributor

Relay Computer

Paul Kocyla

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592
users
21
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0
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22
A 16-bit CPU, with 16 registers, described in 66 lines of code - with HDL, emulators and a macro assembler.
Project Owner Contributor

OPC-5 - a CPU for FPGA, in one page

BigEd

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2k
users
28
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5
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Document and create a modern replica of the Harwell Dekatron computer known as the WITCH
Project Owner Contributor

WITCH-E

Dave's Dev Lab

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1.6k
users
27
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5
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Synchronous All-Purpose Minimal Instruction Reckoning Apparatus
Project Owner Contributor

S.A.M.I.R.A. MK-II

menguinponkey

eye
843
users
16
comment
3
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18
I am building a (currently) 64k RAM computer with an FPGA. Now with lots of pipelining!
Project Owner Contributor

FPGA computer

Dylan Brophy

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2.7k
users
20
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3
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18
Simple 4-bit CPU consisting of 11 TTLs. Circuit is duplicated from the one in a Japanese book "how to make CPU", "CPUの創りかた"
Project Owner Contributor

TTL based 4-bit CPU

kodera2t

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2.7k
users
24
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1
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18
An 8-bit load-store CPU with 2 pipeline stages, designed in Logisim and implemented in VHDL + assembler written in Python
Project Owner Contributor

muCPU: an 8-bit MCU

Reed Foster

eye
775
users
97
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0
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13
Building a computer from scratch
Project Owner Contributor

epRISC Open Computer

John C. Lemme

eye
225
users
11
comment
5
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12
My goal is a 4-bit CPU using recycled cardboard substrate and Diode Transistor Logic. This will develop into an educational platform.
eye
983
users
17
comment
11
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12
A breadboard-able computer which uses only a single instruction - MOVE
Project Owner Contributor

One-instruction TTL Computer

Justin Davis

eye
833
users
15
comment
7
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11
Brainfuck computer on reed relays with Von-Neumann arch
Project Owner Contributor

Brainfuck relay computer

Artem Kashkanov

eye
1.1k
users
14
comment
8
skull
11
Taming the 74LS181 ALU chip
Project Owner Contributor

The 74LS181 ALU

agp.cooper

eye
513
users
116
comment
0
skull
10
A concept for a small RPN processor with interesting features
Project Owner Contributor

CPU7

KnivD

eye
649
users
14
comment
4
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10
An educational 16-bit CPU made from < 1000 transistors with lots of LEDs that anyone can build and learn from
Project Owner Contributor

NanoCPU.org

Tony Robinson

eye
442
users
11
comment
3
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10
Bit serialized ARM Cortex Processor
Project Owner Contributor

Kortex-S Processor

Antti Lukats

eye
166
users
9
comment
4
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9
This is my fourth home brew CPU
Project Owner Contributor

CPU4

agp.cooper

eye
304
users
6
comment
2
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9
16-bit computer system featuring a custom-designed CPU
Project Owner Contributor

LEO-1 Homebrew CPU

John Croudy

eye
436
users
481
comment
0
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8
a configurable 16-32 bits MPU in VHDL for tiny FPGA
Project Owner Contributor

microYasep

Yann Guidon / YGDES

eye
242
users
8
comment
2
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7
A one-page CPU: spec, HDL, emulator and macro assembler each in one page. Fits in XC9572 CPLD.
Project Owner Contributor

OPC-1 CPU for CPLD

BigEd

eye
712
users
12
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0
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6
Yet Another Minimalistic One Instruction CPU SUBLEQ means SUBtraction jump on Less than or EQual to zero.
Project Owner Contributor

A SUBLEQ CPU

agp.cooper

eye
425
users
8
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0
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5
I have a lot of random spare parts doing nothing and a need to make them do things...
Project Owner Contributor

Detritus, the 8-bit ... computer?

Jorj Bauer

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185
users
7
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2
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5
I am designing an 8-Bit Computer completely from scratch out of Logic Gates, using only my basic knowledge of how a computer works.
eye
187
users
6
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0
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5
Ideas about using single throw relays for computing, and working prototype circuits.
Project Owner Contributor

Single throw relay computing

will.stevens

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79
users
5
comment
6
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3
A CPU with any number of bits. Uses 74181 and other ttl logic gates
Project Owner Contributor

SBP-CPU (Slice Based Processor)

Dylan Brophy

eye
660
users
7
comment
0
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3
JACA - Just Another CPU Again Homebrew CPU, starting by a simple POC 4-bit CPU on circuit simulator soft. (done), then 8-bit (in progress)
Project Owner Contributor

JACA 1 & 2 Homebrew CPU

Andre Baptista

eye
273
users
5
comment
3
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3
Built this experimental version of the MINIVAC 601 computer from PDF's on the net. Time to completion about 4 months.
Project Owner Contributor

HOMEBREW MINIVAC 601 COMPUTER

Wverish

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383
users
155
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0
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1
A 16bit single cycle RISC processor suporting R format I format BEQ and JMP format.
Project Owner Contributor

16bit RISC Processor

Shashi Suman