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.
- Details
- Kategorie: Shack
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.
- Details
- Kategorie: Arduino
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.
- Details
- Kategorie: Arduino
MODBus master
The hardware for the MODBus master is mounted on DIN-rails inside a cheap installation box.
- Details
- Kategorie: Arduino
MODBUS slave
The MODBUS-slave with the capacitive water level sensor is now mounted inside a die cast aluminium case.
- Details
- Kategorie: Arduino
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.
-
Details
-
Kategorie: Arduino
-
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 :-/
- Details
- Kategorie: Arduino
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:
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:
- Details
- Kategorie: Arduino
2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.
Regular supporter of 
© 2020 Dietmar Krause, DL2SBA