Building a simple 3D printer (and what turned out to be not so simple)
This article describes some of the ideas and thoughts during building my first FDM printer a few years ago and which lessions have been learned from that project.
Building an I2C controllable stepper driver board with DRV8825 breakout boards and ATMega328p
This is the description of a small carrier board for two DRV8825 breakout boards (or compatible) that are controlled by an AVR (ATMega328p) which runs a small (linear) motion processor that gets it's commands via I2C.
Using piezo disks for automatic bed leveling on 3D printers
Description of an easy way of using piezo disks as touch sensors to perform bed leveling with 3D printers or other CNC machines. This blog entry describes the most basic possible way without much external circuits (only an ATtiny13A and two resistors are used)
Alpion - a LoRAWAN GPS tracking and monitoring project
We tried to do something useful using LoRAWAN and since a friend from VelocIT also liked the idea we started the development of GPS tracking and health monitoring for cattle (and other stuff) using LoRAWAN based GPS trackers. We started out developing using some 0815 breakout boards to play around, used ESP32 based custom hardware and now are moving towards a new STMicro platform supporting stuff like GPS tracking, motion analysis, detecting abnormal behaviour and are crunching data on Amazon webservices to provide some highly scaling solution. I'm doing software (architecture, AWS services, embedded firmware) and hardware development (RF frontend design, power management, etc.) for this project at this time.
Public GitHub repositories
sudokusolve
https://github.com/tspspi/sudokusolve
Languages: C99
Backtracking Sudoku (simple) solver for standard 9x9 sudokus in ANSI C99
jscadModels
https://github.com/tspspi/jscadModels
Languages: JavaScript
A small collection of some OpenJSCAD models I've created
DualDRV8825DrvStepperBoard
https://github.com/tspspi/DualDRV8825DrvStepperBoard
Languages: C99
Motion controller code for an AVR based dual stepper controller board
libstlio
https://github.com/tspspi/libstlio
Languages: C99
Simple library supporting reading and writing STL (stereolithography) files from ANSI C99
libccsv
https://github.com/tspspi/libccsv
Languages: C99
CSV parser library (including ACSL contracts)
stepperDriverULM2003RS485
https://github.com/tspspi/stepperDriverULM2003RS485
Languages: C99
Most simple (no acceleration) stepper driver firmware for ATMega328P to control two ULM2003 stepper drivers via RS485
LocalMarlin
https://github.com/tspspi/LocalMarlin
Languages: C
A local fork of Marlin 3D printer firmware including some modifications
rawsockscpitools
https://github.com/tspspi/rawsockscpitools
Languages: C99
A simple collection of rather crude CLI utilities to talk with specific lab devices using SCPI over Ethernet
eit2nfo
https://github.com/tspspi/eit2nfo
Languages: C99
A small tool to convert EIT (Event Information Table) files to Kodi compatible NFO files
libbaseencode
https://github.com/tspspi/libbaseencode
Languages: C99
Simple C99 Base16, Base32 and Base64 encode and decode library
SensorNodeFeather32u4IIDHT22
https://github.com/tspspi/SensorNodeFeather32u4IIDHT22
Languages: C++
Simple sensor node with DH22 temperature and humidity sensor based on the feather 32u4II-LoRA board
Feather32u4_BasicLoRA_OTAA
https://github.com/tspspi/Feather32u4_BasicLoRA_OTAA
Languages: C++
Basic OTAA code for feather 32u4
arduinoSimpleESP8266Lightswitch
https://github.com/tspspi/arduinoSimpleESP8266Lightswitch
Languages: C++
A simple alternative ESP8266 or ESP8265 firmware for Sonoff basic switches using the Arduino framework
arduinoOnewireMaster
https://github.com/tspspi/arduinoOnewireMaster
Languages: C++
Simple (non Assembly) 1-Wire Master implementation for Arduino
simpleFreeBSDPeriodicZFSSnapshotScripts
https://github.com/tspspi/simpleFreeBSDPeriodicZFSSnapshotScripts
Languages: Shellscript
Really simple scripts to produce periodic snapshots of ZFS filesystems on a FreeBSD system on daily, weekly and/or monthly basis
win32TrayUuid
https://github.com/tspspi/win32TrayUuid
Languages: C#
Small C# windows forms utility that generates UUIDs and C header inclusion guards into the clipboard from a tray icon
jcliargs
https://github.com/tspspi/jcliargs
Languages: Java
Simple Java command line argument parser
TJSON
https://github.com/tspspi/TJSON
Languages: Java
Simple JSON serializer and deserializer in Java
TTNClientJ2
https://github.com/tspspi/TTNClientJ2
Languages: Java
Simple client to get data feed from thethingsnetwork (TTN) inside an JavaEE application - uses the Eclipse Paho MQTT and RabbitMQ AMQP libraries
PhpJsonToken
https://github.com/tspspi/PhpJsonToken
Languages: PHP
A simple JSON based token implementation (JWT with HMAC and RSA signatures)
v4l2grab
https://github.com/tspspi/v4l2grab
Languages: C
Fork of the small v4l2grab utility (not my own work)
