Arduino

Universal K3NG rotor interface PCB

Description of a PCB, also called "shield" allowing to build a universal rotator interface based on the K3NG software. Only the AZIMUT function is supported.
This PCB has been thinked to be used either with a LCD display or an Ethernet shield to allow a remote usage via IP, and for a rotator using a variable resistor for the azimut value .  (HAM IV or CD44 in my case)

K3NG pcb nakedThe board includes :
- a 5V/1A regulator
- a header to plug an Arduino UNO and an Ethernet shield
- a HE10 male connector for to LCD display with a ribbon cable 
- a 5 pin DIN connector (+ ground shell) to connect the rotator control box
- 2 connectors for the "Clockwise" and "Counterclockwise" pushbuttons
- a multi-turn ajustable resistor VR2 for the azimut calibration
- an ajustable resistor VR1  for the LCD contrast
- 3 transistors for the CW, CCW, and BRAKE commands (open collector outputs)

I still have some naked pcb boards left. If interested, please feel to contact me.

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K3NG rotator via Ethernet

K3NG pstrotator

To be finished ...
While building up my remote station, i was looking for a solution to control one or 2 azimuth only rotators via the Internet.

There are several solutions and i finally adopted the K3NG rotator project i already used for a rotator controller connected via USB to my computer.
An Arduino compatible Ethernet shield must be plugged in the Arduino. The genuine Arduino shield is presented here.

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HAM IV computer interface "à la K3NG"

To be finished...
Some years ago, i developed my own rotator interface with a PIC 18F452. In a need of another interface, i was unable to find my software sources of this project, lost somewhere in the computer Walhalla ! So, i looked for a finished project to build, and found the K3NG Arduino rotator project.

It looked very complete and having some recent experiences with the Arduino, i decided to give it a try.

What i needed :

  • Only azimuth drive
  • 2 lines LCD display (as i had several)
  • Eventualy 2 buttons CW + CCW to drive the rotator
  • Running on an Arduino Uno (as i had several)

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Arduino - save SRAM !

During the writing of my beehive monitoring project "Apaguard " using an Arduino UNO, i've been quickly very clode to the SRAM limit...

The Arduino UNO has "only" 2048 bytes of SRAM, which can quickly be filled if no precautions are taken.
Here are a few tricks i used during my writing, which permitted me to save a lot of SRAM and should be used by anyone coding on Arduino.

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Arduino - voltage measurements.

At first glance, measuring a voltage with an Arduino UNO seems to be a simple task. You only need to use the builtin A/D converter and the analogRead() function. But if you want to do this and get good results, you need to take some precautions and understand what you are doing !

Here my experience, and at the end i got very good results !

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