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8-Bit Transistor ALU

8-Bit ALU

3,488 transistors. Built to answer a 3am question: Could I rebuild a computer, solo, in a medieval timeline?'

View in 3DExplore the Journey

Build Timeline

From MOSFET simulations to full system assembly. Click each milestone to explore the journey.

1

Simulation

1 week

2

MOSFET Design

2 weeks

3

Schematic Design

3 weeks

4

Universal Verification

1 week

5

PCB Design

2 weeks

6

Custom Inverter Test

1 week

7

PCB Fabrication

2-3 weeks (estimated)

8

Assembly

6-8 weeks (estimated)

Navigate Timeline
Verified

Simulation

Circuit behavior verified using NGSpice and Logisim simulations

Ran comprehensive simulations to verify timing and logic. A mistake here would be expensive for a medieval timeline, so I verified SPICE directives for each design in ngspice.

Technologies Used

NGSpiceLogisim EvolutionKiCad Integration
Completion Time: 1 week

Main Demo Logisim Evolution All Opcodes

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By The Numbers

Project Metrics

A comprehensive 8-bit ALU built from scratch with meticulous attention to detail

0
Transistors
Total (Discrete + ICs)
0
Operations
Arithmetic & logic
1.24M
Tests Passed
100% success rate
12
Weeks
Development time
8 Boards
Custom designed
100%
Open Source
6 Tools
Electric, NGSpice, KiCad, Logisim, Python, SymbiYosys
8-bit
Data path width