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Mark Jeronimus

I held a soldering iron since I was 5 and programmed since I was 8. Studied computational science. I like retro and low level.

Netherlands
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4 Followers
2 Following
1 Projects
7 Likes
mark-jeronimus
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This user joined on 08/19/2014.

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Binary clock with a bit of help from CGA colors
Project Owner Contributor

CGA Clock

mark-jeronimusMark Jeronimus

Things I've Built

Dual lab LASER driver

Drives Red (250mW) and 405nm (140mW). Linear accurate current control with potentiometer and analog input. Safety interlock switches. On-time recorders.

Mouse autofire

When enabled, the left mouse button repeats at 2..30Hz, configurable with a sliding potentiometer (hidden in the weights bay underneath).

DL1414T text scroller badge

+PIC16F84, xtal, transistor, zener, few resistors and 9V battery

66.9k
561
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A set of smart dice, the same size as traditional ones, full of LEDs and Bluetooth-enabled.
Project Owner Contributor

Pixels

jean-simonetJean Simonet

36.9k
3k
11
199
Quickly identify radioactive materials with a pocket-sized ion chamber. Built from standard parts for easy manufacture and low cost.
Project Owner Contributor

Open Radiation Detector

carlos-garcia-sauraCarlos Garcia Saura

33k
541
39
187
A digital clock built with Diode-Diode Logic (DDL), a quirky new logic family using only common diodes and passive components.
Project Owner Contributor

The Diode Clock

ted-yapoTed Yapo

31.9k
522
28
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An open-source "smart watch" that can be built from easily available parts, and assembled by hand. Designed for hackers
Project Owner Contributor

OSHWatch

jared-sansonJared Sanson

31.4k
121
8
92
A project that I started in 2014, aimed to develop a low cost and modular refreshable Braille system
Project Owner Contributor

MOLBED Modular Low cost Braille Electronic Display

madaeonMadaeon

30.7k
3.5k
25
313
Developing hardware to track and assert the air quality in a city based on IOT topology.
Project Owner Contributor

City Air Quality

radu-motisanRadu Motisan

28.6k
7.8k
17
199
Micro Smart LiDAR Sensor
Project Owner Contributor

MappyDot

bleckyBlecky

25k
234
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Wrist watch with monochromatic 16X16 LED Matrix inspired by retro LED watches of 70s and 80s.
Project Owner Contributor

LED Matrix Watch

mileMile

18.3k
3.8k
13
55
Selfmade watch that helps You learn STM32 programming.
Project Owner Contributor

nWatch

peter-wasilewskiPeter Wasilewski

18k
3k
12
134
! a platform for sensing and indicating human arousal !
Project Owner Contributor

SHE BON

sarah-petkusSarah Petkus

16.3k
211
28
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Finally a mouse that can be freely changed, fixed and upgraded suit the user. Second Generation is coming!
Project Owner Contributor

RX-Modulus (Completely Modular Mouse)

benwbenw

14.9k
1.9k
66
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My goal is a 4-bit CPU using recycled cardboard substrate and Diode Transistor Logic. This is an educational platform for me.
Project Owner Contributor

The Cardboard Computer - IO is my name

dr-cockroachDr. Cockroach

12.7k
2.9k
8
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super mario as a hologram? Princess Leia? No problem for voLumen! ................virtual media brought to reality................
Project Owner Contributor

voLumen - volumetric 3D display device

maxmalimax.mali

11.5k
179
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Using a cheap tire compressor, driven by a stepper motor, to apply solder paste from a syringe and then soldering small wires to components.
Project Owner Contributor

CNC Add-on: Rot. Laser Soldering Paste applicator

altmarcxsAltMarcxs

10.3k
85
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This projects tracks my efforts to develop discrete LED-Transistor logic building blocks and designing a CPU from them.
Project Owner Contributor

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

timTim

8.2k
55
14
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Replace your old 78xx voltage regulators with this much more efficient pin-compatible buck converter.
Project Owner Contributor

78xx Replacement

stefan-wagnerStefan Wagner

6.4k
18
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25
Put aside your FPGAs and high performance oscilloscopes - Here's a two-chip solution to your reverse engineering needs
Project Owner Contributor

Dumping Firmware With a 555

jarrettJarrett

1.2k
31
2
11
An LED replacement for a single line 16 digit LCD
Project Owner Contributor

DL1414 Serial Display

pyroferPyrofer

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Dr. Cockroach wrote 01/18/2017 at 22:03 • point

Good evening and thank you for the like of my cardboard computer project :-)

  Are you sure? yes | no

Radu Motisan wrote 08/05/2016 at 20:54 • point

Thanks for following uRADMonitor. I was able to produce the hardware already, and a few units are available through IGG: https://www.indiegogo.com/projects/uradmonitor-environment-health/x/7951265 . Getting one is a great support for this project!

  Are you sure? yes | no

Radu Motisan wrote 11/21/2017 at 20:34 • point

Thank you for following #City Air Quality  ! Nov 22 (tomorrow) is the start of a crowdfunding campaign to encourage the uniform distribution of environmental detectors on the Globe. Read more on https://www.uradmonitor.com/uniform/ and if you feel this is important to you, please help me to make it happen.

  Are you sure? yes | no

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