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Mitsuru Yamada

Electronic engineering research engineer, I like making computers in the 1970s and astronomical observation

Saitama Pref, JAPAN
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101 Followers
17 Following
18 Projects
702 Likes
mitsuru-yamada
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This user joined on 11/14/2020.

14.3k
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The PERSEUS-8 is the enhanced version of the minimum configuration type the PERSEUS-7 6502 computer
Project Owner Contributor

PERSEUS-8 homemade 6502 computer

mitsuru-yamadaMitsuru Yamada

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PERSEUS-9 is a die-cast aluminum housing mobile computer having dual 6502 CPU, 48 keys and 40 x 7 LED character display.
Project Owner Contributor

PERSEUS-9 homemade mobile 6502 computer

mitsuru-yamadaMitsuru Yamada

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An RS232C serial terminal using MC6802 & LED dot matrix display modules
Project Owner Contributor

6802 Serial Terminal

mitsuru-yamadaMitsuru Yamada

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A minimal 6502 computer that can be programed machine language without PCs
Project Owner Contributor

6502 standalone computer

mitsuru-yamadaMitsuru Yamada

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Homemade simple operational amplifier module and an audio amplifier using it
Project Owner Contributor

Homemade Operational Amplifier

mitsuru-yamadaMitsuru Yamada

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A 6802 homebrew computer named PERSEUS-3 that was the basis of my PERSEUS series computers
Project Owner Contributor

PERSEUS-3 6802 homebrew computer

mitsuru-yamadaMitsuru Yamada

View all 18 projects

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

Hackaday TTLers

yann-guidon-ygdesYann Guidon / YGDES

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Learn how to build your own brushless motor and control it with a Brushless Biz Card!
Project Owner Contributor

Brushless Motor and Driver Business Card Kit

andy-geppertAndy Geppert

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A mower not only for your yard, but also for your community.
Project Owner Contributor

Roktrack - Pylon Guided Mower

yuta-suitoYuta Suito

3.8k
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Cheap R-2R ladder DAC with CD4007 CMOS ICs
Project Owner Contributor

6bit Digital-Analog-Converter

florian-wilhelm-dirnbergerFlorian Wilhelm Dirnberger

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BASIC for the 8080 and Z80, fits in 1K of memory, runs BASIC games on a 2K system. Features similar to Palo Alto Tiny BASIC.
Project Owner Contributor

One kilobyte Tiny BASIC for the 8080 and Z80

willstevenswill.stevens

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Modeled after a wrist watch video sent to me by our youngest son.
Project Owner Contributor

Geneva Clock

greg-zumwaltGreg Zumwalt

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A wrist watch that uses rare vintage LED dot-matrix HDSP-2000 indicators
Project Owner Contributor

HDSP-2000 Wrist Watch

vitaliiVitalii

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All-in-one computer using the Baffa-2+ Single Board Computer and based on the standard set of boards from the Baffa-2 Project
Project Owner Contributor

Baffa-2+ Computer

augusto-baffaAugusto Baffa

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Students learn to melt solder, layout PC boards, use tools, and troubleshoot by building an analog, discrete component receiver.
Project Owner Contributor

High Schoolers Build a Radio Receiver

billmearabill.meara

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A revised Portable Pi with a Pi 5, 1280x800 touchscreen and 50% ortholinear keyboard running Ubuntu.
Project Owner Contributor

Portable Pi Mk II

jefmerjefmer

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My not so fancy example of Magnetic Core Memory using fairly cheap cores and free parts from my junk box.
Project Owner Contributor

Magnetic Core Memory The Dr Cockroach Way

dr-cockroachDr. Cockroach

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A simpler and safer way to drive nixies
Project Owner Contributor

EasyNixie

allexokallexoK

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Recombobulating a 1970s vintage digital electronic calculator from Eastern Germany
Project Owner Contributor

Soemtron ETR220 Restoration Project

keri-szafirKeri Szafir

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A nixie clock that is designed in old fashioned way
Project Owner Contributor

Nixie Clock On Binary Counters

vitaliiVitalii

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When a Jack of all Trades Jacks In.
Project Owner Contributor

Jack of all Trades Cyberdeck

someghostdudesomeghostdude

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Library for Noritake Itron GU3000 series (GU3100 and GU3900) VFD module parallel interface graphic DMA mode for Raspberry Pi
Project Owner Contributor

Graphics Library for Noritake Itron Dot Matrix VFD

ryo-mukaiRyo Mukai

903
7
7
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Intel 4004 single board computer running calculator program, VTL interpreter, 8080 emulator, and so on
Project Owner Contributor

Intel 4004 Homebrew Computer

ryo-mukaiRyo Mukai

576
9
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Handheld device with headers for 2 Arduino Uno shields. Powered by an ATmega 1284 and an Arduino Nano.
Project Owner Contributor

Modular Handheld Retro Computer

dixbitDixbit

453
5
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Long range infrared Beam Interruption Detector(BID) using infrared pre-amplifier OP AMP and using single IR transmitter and receiver diode.
Project Owner Contributor

Infrared Pre-Amplifier

mit41301mit41301

View all

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Bits

Michael Gardi wrote 10/03/2024 at 16:38 • point

Thank you for your interest in my MCM/70 Reproduction project Mitsuru. I love the look of your homemade computers. 

  Are you sure? yes | no

Mitsuru Yamada wrote 10/04/2024 at 00:26 • point

You're welcome. I found the process of reproducing the enclosure and keyboard of your project very impressive! I have never heard of the beautiful computer MCM/70 before.

  Are you sure? yes | no

mkdxdx wrote 09/25/2024 at 22:53 • point

Hey, some hella cool builds you've got there!

  Are you sure? yes | no

Mitsuru Yamada wrote 09/26/2024 at 00:35 • point

Thank you for your comment. Regardless of the world's trends computers, I continue to challenge myself in my own way with unique hardware and software.

  Are you sure? yes | no

jefmer wrote 04/20/2024 at 08:28 • point

Hi, Thanks for your interest in Portable Pi Mk II. I love your 6502 projects. I built my  first computer around the 6502 based KIM-1 SBC.

  Are you sure? yes | no

Mitsuru Yamada wrote 04/20/2024 at 12:16 • point

You're welcome. I would like to salute you for your ingenuity regarding the overall design of your computer keyboards and enclosures.

  Are you sure? yes | no

Dixbit wrote 08/27/2023 at 14:04 • point

Hi @Mitsuru Yamada! Thank you for liking my #Modular Handheld Retro Computer project :)

Your PERSEUS retro computers are awesome and very stylish!

  Are you sure? yes | no

Mitsuru Yamada wrote 08/28/2023 at 03:29 • point

You're welcome. Like you, I'm also interested in a programming scale of a few KB. In the direction of the latest computer technology, it is common to generate code of megabytes or more, but I think that a single person can grasp the whole world in bits of a few KB. I want to shed light on this area that seems to have been forgotten.

  Are you sure? yes | no

michimartini wrote 05/12/2022 at 21:22 • point

Wow, you make extremely beautiful machines. Thanks for following my humble masking tape plotter project. 

  Are you sure? yes | no

Mitsuru Yamada wrote 05/13/2022 at 00:49 • point

Thanks for looking at my project too. I also like simple mechanisms. I have not written an article, but I have tried to make my own drive controller for an astronomical telescope by driving a stepper motor in microstepping, but it did not good work due to microvibrations.

  Are you sure? yes | no

Michael Wessel wrote 02/11/2022 at 05:29 • point

Thank you for liking my project "The Talking Microtronic Computer System Emulator"!

https://hackaday.io/project/11560-the-talking-microtronic-computer-system-emulator

  Are you sure? yes | no

Mitsuru Yamada wrote 02/11/2022 at 15:04 • point

You're welcome. I looked up the original computer training kit 'Microtronic' on a German website. In my case, the first training kit I used was Hitachi, H68/TR.

  Are you sure? yes | no

padnest wrote 01/24/2022 at 05:59 • point

Thank you for liking my project #MRC6502 - Modular Retro Computer 

  Are you sure? yes | no

Mitsuru Yamada wrote 01/24/2022 at 09:27 • point

You're welcome. I'm also enjoying assembler programs on the 6502！

  Are you sure? yes | no

padnest wrote 01/24/2022 at 11:01 • point

Wonderful!!! I would like to get any advice or suggestions from you about my project! I'm an hobbist who loves digital electronics and I have a lot to learn! Thank you also for following!

  Are you sure? yes | no

j wrote 11/19/2021 at 10:05 • point

Those are beautiful projects ! Nice to see the 74141 in your Nixie Clock.

  Are you sure? yes | no

Mitsuru Yamada wrote 11/19/2021 at 14:32 • point

Thanks! SN74141 is still available, which was a big help. By the way, I used SN74142 (counter + driver) for following frequency counter in 1975.

https://www.youtube.com/watch?v=dDuc7a1YSXI

  Are you sure? yes | no

j wrote 11/19/2021 at 14:55 • point

Very nice. I inherited a bunch of 74141 produced around 1975 by Siemens and they work like a charm.

  Are you sure? yes | no

Giovanni wrote 02/17/2021 at 23:58 • point

Thanks for commenting, very cool projects!

  Are you sure? yes | no

Ken Yap wrote 01/16/2021 at 08:11 • point

Thanks for liking #TTL binary clock !

  Are you sure? yes | no

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