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Worked all Germany contest 2015

This was my first participation in the WAG contest since 2010 - and I must say, it was a pleasure!

I managed to complete 472 QSOs all in CW :-)

 

Allgemein Zuletzt aktualisiert: 18. Oktober 2015
Weiterlesen: Worked all Germany contest 2015

ELECRAFT K2 - Fixing VFO ALC issue

I've planned to sell my ELECRAFT K2 so I placed some adds in the various HAM sources and I found a buyer willing give my K2 a new home.

Fortunately I decided to do a quick check on the K2 functions, to be sure, that the buyers receives a full functional K2.

I did the check in the late afternoon on 80m and I was shocked - strong stations can be received every 7kHz. Testing the transmitter shows a totally unstable RF signal.

Transceiver Zuletzt aktualisiert: 08. Juni 2015
Weiterlesen: ELECRAFT K2 - Fixing VFO ALC issue

XPhase - Interference reduction

Some weeks ago I've build a full-featured XPhase for my father, DK1UO. He is sometimes affected by heavy interference from Plasma-TVs or similar scrap

The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.

My XPhase is based on the work of Hanns, DK9NL. A commercial versions can be found here under the name QRM-Eliminator. Google will provide you some futher informations.

Shack Zuletzt aktualisiert: 28. April 2015
Weiterlesen: XPhase - Interference reduction

LF-Converter

I've ordered the LF-converter BX-082 kit from the German HAM Radio magazine FUNKAMATEUR already some months ago and now found the time to build and test it.

Transceiver Zuletzt aktualisiert: 30. November 2014
Weiterlesen: LF-Converter

SMD Solder Station

It all started with an article in the issue July 2014 of the German amateur radio magazine FUNKAMATEUR. Martin Kumm, DC3MKB published in this issue an interesting article for a smart SMD soldering station based on the well know ARDUINO UNO.

Tools Zuletzt aktualisiert: 16. November 2014
Weiterlesen: SMD Solder Station

Connecting an Arduino to MOSQUITTO

In this post, I've showed, how to setup Mosquitto on an Windows 8 machine. Now let me describe, howto connect an Arduino via Ethernet to the running Mosquitto MQTT broker.

Arduino Zuletzt aktualisiert: 26. Mai 2014
Weiterlesen: Connecting an Arduino to MOSQUITTO

Getting started with MOSQUITTO

After my first experiments with 2elemtry, I decided to give MOSQUITTO a try. Mosquitto is a small MQTT message broker, which provides basically the same functionality like 2lemetry.

Here the steps, I got Mosquitto up und running on my Windows 8 machine:

Arduino Zuletzt aktualisiert: 26. Mai 2014
Weiterlesen: Getting started with MOSQUITTO

Getting started with 2lemetry

During my researches for my home automation project I also stumbled across the MQTT protocol for sensor-server-communication. A matching arduino library was found quickly here on Nick's blog. An arduino sketch was quickly copied from here and modified. Download my version from here.

Arduino Zuletzt aktualisiert: 26. Mai 2014
Weiterlesen: Getting started with 2lemetry

Neuer DARC Image Film

Ein richtig gut gemachter Film des DARC!

Allgemein Zuletzt aktualisiert: 22. November 2013

nanoKeyer - neue Frontplatte

Für den ersten nanoKeyer habe ich mir zwar das Original-Gehäuse gekauft, aber der Einfachheit halber eine simple Alu-Fronplatte genommen. So richtig schick war die auf Dauer nicht. Es wurde langsam Zeit, dass er noch eine schöne Frontplatte bekommt.

Shack Zuletzt aktualisiert: 28. Juli 2013
Weiterlesen: nanoKeyer - neue Frontplatte

Capacitive (water) level sensor

The electronics for my capacitive (water) level sensor is described here. In this article I will go a little bit in depth regarding the sensor reading and value compensation.

Arduino Zuletzt aktualisiert: 09. Juni 2013
Weiterlesen: Capacitive (water) level sensor

MODBus shield

This is the second PCB I've developed. It is an arduino-shield for my home automation project. It is also devoped using CADSoft EAGLE and was produced by PCB-Devboards in Germany.

Arduino Zuletzt aktualisiert: 09. Juni 2013
Weiterlesen: MODBus shield

MODBus master

The hardware for the MODBus master is mounted on DIN-rails inside a cheap installation box.

Arduino Zuletzt aktualisiert: 09. Juni 2013
Weiterlesen: MODBus master

MODBUS slave

The MODBUS-slave with the capacitive water level sensor is now mounted inside a die cast aluminium case.

Arduino Zuletzt aktualisiert: 09. Juni 2013
Weiterlesen: MODBUS slave

Capacitive level sensor - electrode design

In the previous article regarding the capacitive water level sensor, I've presented two different electrode designs:

  • A coaxial electrode made from a rectangular aluminium tube an a  single isolated wire as "central conductor"
  • A simple twin-wire electrode made from simple speaker-wire

Here my findings regarding each electrode.

Arduino Zuletzt aktualisiert: 07. Juni 2013
Weiterlesen: Capacitive level sensor - electrode design

MODBus Node with level sensor

This is a MODBUS-node with a capacitive water level sensor, a DS12S80 temperature sensor and a RS485 interface to the main controller.

This is my first project based on CADSOFT Eagle free-version. I still have to learn a lot for creating 2-layer PCBs :-/

Arduino Zuletzt aktualisiert: 01. Juni 2013
Weiterlesen: MODBus Node with level sensor

Arduino Home Automation

Long time ago I've started my personal home automation project. The first building blocks where some small PCBs for RS485 interfacing and temperature sensing. Later I've started outlining a controller architecture for my home automation projects.

Currently my infastructure looks like this:

OVER1

From top to bottom:

  • An Arduino Mega256 with Ethernet-Shield. The RS485 interface is assembled on a small breadboard using the LTC1487 line driver. The LCD is attached via small I2C interface to the arduino.
  • An Seeeduino 328P with an  attached experimental shield with an identical RS485 interface.

The Arduino Mega256 is the MODBUS master with connection the internet data collection server. The Seeeduino is acting as a MODBUS slave providing 4 analog and 1 digital register.

Read on about the next steps here:

  • Water-level sensor with MODBus interface
  • Arduino-Shield with MODBus interface

 

Arduino Zuletzt aktualisiert: 01. Juni 2013

MODBus - register usage

Usually the MODBUS protocoll only supports registers based on 16-bit values. If you want to transfer custom datatypes like double, float etc. via the modbus a simple trick can be used.

Arduino Zuletzt aktualisiert: 01. Juni 2013
Weiterlesen: MODBus - register usage

nanoKeyer - Extensions - 2nd

Saving parameter to EEPROM

I've discovered, that the value of the weighting feature is not saved to the EEPROM. I'Ve updated the Sketch.

All my changes in the sketch are surrounded with a conditional statement:

#ifdef DL2SBA...#endif

and should be discovered easily.

Shack Zuletzt aktualisiert: 18. Mai 2013
Weiterlesen: nanoKeyer - Extensions - 2nd

nanoKeyer -Extensions

Extensions

I've applied the following extension to my nanoKeyer:

  • Powersupply
  • Memory bank selection
  • smaller code changes

 

Shack Zuletzt aktualisiert: 18. Mai 2013
Weiterlesen: nanoKeyer -Extensions
  1. Zusatzschaltungen für Arduino etc.
  2. Update I2C LCD-Library for Arduino
  3. nanoKeyer - Arduino based memory keyer
  4. Digital-Multimeter comparision
  5. Splitter/Combiner - Funkamateur.de
  6. KW-Antenne MP1
  7. Hochleistungswiderstand
  8. Mini Morsetaste SQUEEKY
  9. ShackController
  10. Reverse Beacon Network
  11. Dune HD Smart B1 + S-Video
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DL2SBA
  • Home
  • CNC
    • MF70
    • Projekte
    • WinPCNC
  • Computer
    • Apple Mac
    • Arduino
    • IoT Internet of Things
    • Microcontroller
    • Raspberry Pi
    • Synology
    • Video
  • Electronics
    • Layouts
    • Measuring Technology
      • GPSDO
      • RF Powermeter
    • Power Supply
    • Tools
  • Ham-Radio
    • About
    • Antennas
    • Contest
    • hamware
    • QRP
    • Satellites
    • SDR
    • SDXG
    • Shack
    • SOTA - Summits on the Air
    • Transceiver
    • Various
    • vna/J
    • WSPR
  • Nature
    • Erdbeben
    • Wandern
  • For sale
  • NOAA
  • SDR