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Tim

Digital Logic, CPUs, LEDs, and combinations thereof.

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This user joined on 10/31/2015.

My Projects

This projects tracks my efforts to develop discrete LED-Transistor logic building blocks and designing a CPU from them.

LCPU - A CPU in LED-Transistor-Logic (LTL)

8 Bit CPU implemented in 100x100µm² IC area for TinyTapeout

Zinnia (MCPU5)

Work in progress: Flow to synthesize VHDL/Verilog code into a PCB

VHDL/Verilog to Discrete Logic Flow

An addressable LED based on discrete transistors

The TransistorPixel

Creating Electronic Dice with the least number of components in the most obscure technologies

Circuit Golf: Electronic Dice Edition

A TTL CPU I built a long time ago when I bought a huge stock of NOS TTL chips on ebay

4 Bit TTL CPU

View all 19 projects

Projects I Contribute To

Where DIY DIP/SSI/MSI CPU makers meet and discuss other TLA (three letters acronyms)

Hackaday TTLers

yann-guidon-ygdes Yann Guidon / YGDES

A group for those who want to build their own bipolar transistors

Bipolar dudes

yann-guidon-ygdes Yann Guidon / YGDES

Attempting to lower the cost and augment flexibility of discrete logic designs.

Logic strips

yann-guidon-ygdes Yann Guidon / YGDES

My Pages

LTL Gen2 Dice

01/14/2022 at 11:41 • 5 comments

Stats for LTL logic part

Component           Count
pin                 8
resistor            42
led                 75
npn transistor      21
------------------  -----
Total:              146

81 LEDs in total!

Impression of how the logic part could look like in operation:

Projects I Like & Follow

A Working Replica of the classic 555 timer made using discrete components

Giant 555 Timer

rudraksha-vegad Rudraksha Vegad

Smartwatch wearable, ultra-long life measured in years, no need to recharge.

Smartwatch 10 Years Ultra-Long Battery Life

Put aside your FPGAs and high performance oscilloscopes - Here's a two-chip solution to your reverse engineering needs

Dumping Firmware With a 555

jarrett Jarrett

Can we build Machine Learning enabled sensor for under 1 USD?

1 dollar TinyML

jon-nordby Jon Nordby

We've come full circle. Here's a timer made up of timers...

555 Timer - Timer

jesse-farrell Jesse Farrell

NE555-spiced buck converter

NE555 buck converter

An 8 bit binary counter made using only 555 timer chips and a few passive components.

An 8 bit binary counter made from 555 Timer chips

Blinking RGB LEDs with 555s and a handful of 74-series logic

NeoPixel Punk Console

adrian-studer Adrian Studer

Modern recreations of a 1898 21-segment display

SC-002

I still can't believe it's working.

A different kind of programmable LED

sam-ettinger Sam Ettinger

Move the plane around the map to see live images from around the world through a window frame

Window to the World

alex-shakespeare Alex Shakespeare

A "feather-ish" development board achieving <100nA deep sleep current with real time clock wake-up

Nanosleeper - Sub 100nA Sleep Dev Board

Portable Variable Power Supply

CH32X035 USB PD Adapter

stefan-wagner Stefan Wagner

A very simple, low cost MPP solar charger built around the venerable 555 timer

555 MPP solar charger

patrick-van-oosterwijck Patrick Van Oosterwijck

The 74181 ALU circuit recreated using Light Logic gates

74181 4-bit ALU without transistors

dr-cockroach Dr. Cockroach

All Logic Gates & 2-bit Ripple Carry Adder built with only TLC556 Timer ICs. Proof of concept blocks for 555 based Turing Machine/uP

555 Timer Functional Complete Logic Gates

lornechrones-nick LorneChrones (Nick)

Development board for the STM32G030F6P6 cost-effective 32-bit ARM Cortex M0+ microcontroller

STM32G030 F6P6 Development Board

stefan-wagner Stefan Wagner

Light Logic learns to roll

Light Dice

dr-cockroach Dr. Cockroach

View all

Bits

VALENTINE wrote 11/23/2023 at 17:53

Thank you. Cheers! Valentine

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Patrick Van Oosterwijck wrote 12/11/2021 at 20:04

Thanks for your interest in my #555 MPP solar charger project!

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Yann Guidon / YGDES wrote 11/13/2021 at 12:12

And again ! https://hackaday.com/2021/11/13/using-vhdl-to-generate-discrete-logic-pcb-designs/

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Tim wrote 11/13/2021 at 22:23

yay!

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Yann Guidon / YGDES wrote 02/26/2021 at 12:23

AAaaaaaand HaDed again :-P

https://hackaday.com/2021/02/26/diy-all-transistor-addressable-pixel

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Yann Guidon / YGDES wrote 06/23/2020 at 15:47

You've been HaDed again !
https://hackaday.com/2020/06/23/chaotic-oscillator-from-antique/

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Tim wrote 06/23/2020 at 17:14

Indeed! Very nice. There still is interesting stuff to do with RTL after all :)

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Yann Guidon / YGDES wrote 06/23/2020 at 17:36

indeed :-)

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Dusan Petrovic wrote 06/08/2020 at 17:06

Will send you a private message.

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Dusan Petrovic wrote 06/08/2020 at 13:02

Hi Tim, thank you for following my #Homebrew CPU list.

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Tim wrote 06/08/2020 at 13:27

I was actually wondering how i could submit projects to it?

Are you sure? yes | no