Electronic stuff mostly for model airplanes and trains.

Now also with model trains.

This site is mainly for various homemade electronic constructions that is related to R/C model flight and trains. But other electronic constructions can be found here as well. If they are interesting, funny or crazy enough, then they are here.

This page is maintained by Mikael Ejberg Pedersen. Contact me here.


Contents of ejberg.dk:

Dual digital signal and brake module

Digital signal and brake module for Märklin digital trains.
Exists in both a compact version, and a version without smd parts.



Coming soon

New and exciting project for the model railroad.



Servo Tester 1

My first servo tester. Based on an Atmel 90S2313 AVR. Add a 1x16 char LCD, 4 push-buttons and a few discretes, and that is it. Controls a single servo with a resolution of 0.0001 ms. Can also read a pulse width from a receiver.



Servo Tester 2

This new servo tester is a complete redesign of my old one.
Featuring the same high resolution as its predecessor, it is now able to control two servos independently. It can analyse the servo signal quality from your receiver. It measures voltage and current under servo load. It can be used as a tachometer, and with a later software upgrade it can also be remote controlled from a PC.
It uses a rotary encoder for fast and intuitive navigation of the menus, which make it even more simple to use than the old 4-button tester, despite the many new and advanced features.



LED Fader 2

One of those crazy things that has absolutely nothing to do with model airplanes.
The LED Fader 2 uses an Atmel Mega8 or Mega16 AVR to make 16 PWM outputs, designed for driving a bunch of LEDs. Each channel has 256 output levels, and are refreshed at 100 Hz.
Led Fader 2 also provides an entire script language to control the LEDs. Make your own nice light patterns and colour changing effects.
Be sure to see the small video of my 67-LED indoor water fountain. It demonstrates the concept way better than a thousand words.



Discharger frontend for a constant-current charger

Yet to be translated !!!!



Galleries

Pictures, pictures and more pictures.




Links to other interesting sites:

iCollectTrains
Home of the iCollectTrains program. If you want to keep track of your model train collection, then I highly recommend this software. Easy to use, yet it has some very powerful functions. I use it myself.

Electronic Gadgets for Radio Control

Storkøbenhavns Modelflyveklub (in Danish)
My local R/C club.



Last update: Jan 17, 2010