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JNP-3R

Grumpy robot cat. Likes to fix old things and sometimes make new ones.

Colorado, USA
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3 Following
3 Projects
13 Likes
jnp-3r
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This user joined on 02/27/2018.

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An MC14500B based single board computer with an old-school front panel for interactive programming
Project Owner Contributor

Uno 14500

jnp-3rJNP-3R

246
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Replacement boards for a cheap commercial cable tester
Project Owner Contributor

Attiny24 Network Cable Tester

jnp-3rJNP-3R

404
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A custom PCB running QMK to allow the use of the keymech from a Brother AX-33 on a PC
Project Owner Contributor

USB controller for an AX-33 keyboard

jnp-3rJNP-3R

Things I've Built

Uno Computer

This is a simple one bit Harvard architecture computer made out of 74HCxx components. The instruction set is loosely based on the MC14500B. Design files are on github here: https://github.com/juniperlynx/Uno-Computer

39.2k
455
36
391
An open hardware reading device that's easy to build, easy to manufacture, and easy to make your own.
Project Owner Contributor

The Open Book

joey-castillojoey castillo

11.3k
59
8
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Retro computer built from TTL, with 6502 and Z80 instruction set. Includes video, sound and filesystem. No microprocessor or FPGA.
Project Owner Contributor

Isetta TTL computer

roelhroelh

9.4k
90
16
90
inductively-coupled radiofrequency plasma toroid in xenon gas
Project Owner Contributor

Plasma Toroid (sky-guided PCB edition)

sky-guidedsky-guided

7.8k
54
16
82
An RS232C serial terminal using MC6802 & LED dot matrix display modules
Project Owner Contributor

6802 Serial Terminal

mitsuru-yamadaMitsuru Yamada

4.1k
26
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I am making a full sized MCM/70 reproduction, a Canadian personal computer from 1974.
Project Owner Contributor

MCM/70 Reproduction

michael-gardiMichael Gardi

3.9k
27
5
24
This is my 6809 Homebrew Computer
Project Owner Contributor

HB6809 Homebrew computer

dave-collinsDave Collins

3.7k
34
9
38
The ultimate dual OPL3 MIDI syntesizer with touch screen
Project Owner Contributor

OPL Studio - OPL2 / OPL3 MIDI Synthesizer

maarten-janssenMaarten Janssen

2.9k
14
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Let's do justice to this mistreated machine, at last!
Project Owner Contributor

LittleSixteen - Commodore 16 Mainboard

sukkoperaSukkoPera

2.9k
27
6
21
Producing a Functional Clone of the Apple Lisa 2/5, using NOS components.
Project Owner Contributor

A Brand New Apple Lisa

dosfoxDosFox

2.7k
16
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This is a 1-bit vacuum tube computer running at just +24V and -12V.
Project Owner Contributor

1-Bit Vacuum Tube Computer

usagi-electric-davidUsagi Electric (David)

858
8
1
11
Retro Style 1-Bit Trainer Board based on MC14500
Project Owner Contributor

PLC14500

nicola-cimminoNicola Cimmino

818
10
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A 160 phrase Augmentative Alternative Communication device for a nonverbal client. Powered by CircuitPython.
Project Owner Contributor

Tactile AAC Board

thornhillThornhill!

443
8
5
8
GAL16V8 MC14500-LIKE UNIT
Project Owner Contributor

GAL14500

%D0%90%D1%80%D1%82%D1%91%D0%BC%20%D0%A8%D0%B0%D0%BA%D0%B8%D1%80%D0%BE%D0%B2Артём Шакиров

355
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a finite state machine based on the MC14500 Industrial control unit.
Project Owner Contributor

1 - bit ttl / cmos finite state machine

dave-collinsDave Collins

276
1
0
1
Based on the 1970s radio shack Video Enhancer. A very Low parts count Analog video Glitcher for AV Equipment.
Project Owner Contributor

Altoids Style Tin CRT Video Glitcher

neil-mundtNeil Mundt

200
4
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A pocket sized synthesizer based around the vintage LM709.
Project Owner Contributor

Krackle Krusher

ericEric

165
6
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Radiation Hardened On Board Computer for Cube Satellite. Uses dual lockstep TMS570 MCU SIL 3, DSP, radiation hardened MRAM,external Watchdog
Project Owner Contributor

Radiation Hardened On Board Computer CubeSatellite

brosnan-yuenBrosnan Yuen

107
3
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BANDIT is a standalone bare-metal computer for hassle-free programming of games and music in a dialect of ColorForth.
Project Owner Contributor

BANDIT a standalone rp2040 ColorForth Computer

julian-dscfJulian DSCF

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roelh wrote 09/15/2024 at 10:33 • point

Hi JNP-3R, thanks for liking the #Isetta TTL computer !

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roelh wrote 09/09/2024 at 09:43 • point

Hi JNP, thanks for following the #Isetta TTL computer !

  Are you sure? yes | no

roelh wrote 09/08/2024 at 20:24 • point

Hi JNP, thank you for liking and following #Kobold - retro TTL computer and #1 Square Inch TTL CPU ! My project #Isetta TTL computer might also interest you, that's where the action is now.

  Are you sure? yes | no

Michael Gardi wrote 09/08/2024 at 10:19 • point

Thank you for your interest in my MCM/70 Reproduction project. 

  Are you sure? yes | no

Mitsuru Yamada wrote 02/13/2024 at 04:20 • point

Thank you for liking and following my #6802 Serial Terminal! This LED module always requires a bit pattern of character fonts to be serially input, so I had quite a bit of trouble getting it to work properly. But it became a design assets for subsequent projects.

  Are you sure? yes | no

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