Archive for the ‘TKJ Electronics’ Category

TKJ Electronics is going to be online

October 27th, 2010 No comments

Finally TKJ Electronics has got our own domain, and on 1. November we will have our own homepage too.

Our homepage will contain information about our products, documentation, downloads, online shop and much more. Of course all the pre-release news and other exiting news will be published at the blog!

Check the 1st November for more information.

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New guy at TKJ Electronics

October 3rd, 2010 No comments

Today I’ve teamed up with a student from Belgium, who is going to be a part of TKJ Electronics.
He will help doing the development of new boards, especially the PCB designs as he is very experienced at this.

His name is Robin Theunis, he is 18 years old, a student and lives in Beringen – Belgium.
Currently he studies at a university college called KHK Kempen in Geel.

He have done many projects in the recent years, some for hobby, some for school, and one for a company. He quotes: “I’m in the world of embedded designs”

You can find some of his projects here:

You can see more of his projects on his blog:
Instead of using Eagle he uses Altium – which in my opinion is a much better tool than Eagle, but unfortunately Altium doesn’t provide any Freeware versions!

So welcome to you Robin!

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Visit on Aarhus University in Herning (HIH)

September 10th, 2010 No comments

I haven’t made any posts in a long time, and that’s because of school, homework and work.
But yesterday and today I have time off from school, so I thought it would be nice to follow a first semester class on Aarhus University in Herning; read more about AU-HIH here

I contacted one of the counselors there, Thomas, who was a very friendly man, and was fast to arrange this meeting. So yesterday I took the train from Holstebro to Birk Centerpark and walked with all the students to the school – pretty nice feeling to be “one of them”.
At the school I found the class I was supposed to follow this day, and found me a place to sit. All the teaching are done in English, so I looked forward to see how that would go.
The first two lessons was called “Basic Software Development”, and we worked with Eclipse and C++, where we made some functions, if-statements and for loops. Remember, this is only a first semester class – they will get more advanced over time!

The second two lessons to follow was called “Digital Design”, and I really liked those lessons. We learned about decimal to binary conversion, decimal to octal, decimal to hex and opposite – of course the mathematical way. Then we also learned to to add and substract in binary!
That was 4 hours, and then I had my lunch and went to the electronics lab as the class were going to experiment with AND, NOR and NAND gates on their breadboard. This was a great task, and I got to help some of the students too 🙂
As the last lesson this day, we was introduced to OrCAD, and how simulation works. We tried putting a schematic together with 4 resistors, and then OrCAD simulated the different voltages and power comsumption.

That was the day for the students, but not for me! I was going to meet Thomas, the EDE Counselor (EDE meens Electronics Design Engineer), and have a chat about the study enviroment, the lessons, and how it all works. But not least have a talk about FPGA’s and VHDL.
We sat in Electronics LAB from about 3PM till 10PM, chatting, discussing and playing with FPGA’s. I learned a lot, especially the VHDL language, which is used to program the FPGA chips.
I made a project with the 4 seven segments on my Basys2 board, so I could show numbers on that – but I’ll talk about that in another post in here.
So to end this day we drove to Mac Donals to have meal, and then I took the train back to Holstebro.

It was a very nice and interesting day, and I thanks the class, the teachers and Thomas, for letting me try this. I’m looking forward to join you all the time in a couple of years!
Thank you…


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Problem with BatchPCB Board

April 25th, 2010 3 comments

Today I finally recieved the PCB I ordered from BatchPCB about 1�½ month ago.
Unfortunately PCB isn’t going to work as there is alot of planes being mistakenly ‘poured’ onto a trace!

Today I got the full amount returned from Batch-PCB, including the shipping. Nice guys over there!

Here is some images about the problems…

BatchPCB - Plane 'pouring'

BatchPCB - Plane 'pouring'

BatchPCB - Plane 'pouring'

BatchPCB - Plane 'pouring'

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eDimensional 3D Glasses review

April 14th, 2010 7 comments

Before you start reading this review, please have my current setup in your mind:

  • Intel i5 750 – 3.1GHz
  • ATI Readeon HD 4890 – two DVI outputs
  • 4gb RAM
  • Samsung P2450 60Hz LCD – with VGA and DVI input

Today I got the full amount returned, but that was after I shipped the glasses back to them, and waited in 14 days… I kept calling them, and they just told me that I should write a mail to them, and wait for a response. They always told me: “I asure you that it will be done tomorrow!”

When I bought the glasses I got an email telling me that the software in the package that I was going to receive was outdated, and then there was a download link to a zip file. That zip file included the TriDef Experience setup file, and eDimensionals own 3D shutter glass executable.

So while waiting on the package to arrive, I installed the TriDef Experience. That’s a very neat piece of software, as it did support Anaglyph 3D, and it has a picture and video 2D to 3D converter included. So I was able to watch my 2D movies in 3D, and see my pictures taken with a normal digital camera in 3D!

After 3 business days I received the package, and what was found inside was:

  • The 3D Shutter glasses
  • A VGA dongle, which the screen and glasses plugs into
  • An outdated CD with drivers and software

But the DVI to VGA adapter that I was told was included was missing! 1. bad experience!
Anyways, I had a DVI to VGA adapter laying around so I connected the things quickly and started eDimensionals Shutter Glass program (E-D.exe) as told in the instructions. First I choosed, LCD Mode, then I choosed, Stereo – Normal. Now the shutter glasses started to flicker, and it was heavy flickering. On the screen some darker lines (pixel separation) has appeared, and it didn’t look to well.

Darker lines

When I took the glasses on, the first thing I noticed was that I was being dizzy. My LCD is running 60Hz, so the flickering must be 30Hz, anyways, it was pretty annoying. 2. bad experience, as I was told in the telephone before I bought it, that it would run fine on a 60Hz LCD!

Then I started the TriDef Experience software, and a screen with 4 options came up:

  • Play 3D games
  • Experience Google Earth in 3D
  • View movies and photos in 3D
  • Get 3D movies online

The points (like the black dots here) were small images that should be 3D, but only the bottom one (the fourth) was. The other images were blurry, as both eyes could see both images, after some research I found out that this is called Ghosting. But this wasn’t a normal ghosting thing, as both right and left eyes images were completely visible in each eye, not only slightly visible, like the left eye should see the left eye image clearly, and the right eye image might slightly visible if Ghosting occurs. Therefore there wasn’t any 3D! 3. bad experience!

I thought it might be a problem with the Experience application, so I tried the 2D to 3D application. The same problem occurred there, the top half of the LCD screen wasn’t 3D, while the bottom half was 3D.
Last but not least I tried running Counter-Strike: Source, which is one of the many games supported. In there the same thing occurred, and it wasn’t even playable, as you saw everything double!

I was able to minimize the flickering by messing around with the ATI Catalyst center, but it was a pain in the neck to get the refresh rate changed, especially when the computer recognizes the screen and sets the maximum refresh rate to 60Hz, even when the screen can do 75Hz. But finally I could set the refresh rate to 75Hz, but only at 1600×1200, and then the flickering was only slightly noticeable. The 3D still didn’t work, but now it was the middle part of the screen which didn’t work (the two middle buttons as I told about earlier), and the 25% of the top and 25% of the bottom was working.

Here is four pictures showing what I mean with the 3D not working and the buttons:

Top button (working) - without glasses

Top button (working) - with glasses

As you can see in the first image, which is the screen without the glasses infront, then you are able to see both left and right eyes images. Then when you put the glasses infront, you are only able to see the corrosponding image.

Middle button (not working) - without glasses

Middle button (not working) - with glasses

But then if you take a look at the middle button, then you can see both images (right and left eye) without glasses but also with glasses, which is a problem!

The problem with this kind of ghosting (both images seen clearly in both eyes) sounds much like a syncing problem, and I can’t play with seeing everything double. So if you think about buying this product, I would mind you to be aware of these problems, as they can occur. But there are also people having great success with this product, but that’s mostly people with CRT screens.
So be aware, this kind of shutter-glass technology is not well developed for LCD’s yet!

Here is some pictures of the glasses:

The eDimensional 3D Shutter Glasses

The shutter-glasses from the back

Wierd black line in the shutter lens

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Messy electronics table

January 27th, 2010 No comments

Messy Table

This is the table where I’m working with electronics when it’s messy!
But still I keep a little bit order, as the PIC is in the left, the STM32 in the middle, and the Arduino (+ ultrasonic) at the right.


January 10th, 2010 No comments

So we all know that GSM phones can induce various sounds in unshielded amplified speakers, but ever have one take over control of your machine?

I recently got a new Blackberry 8320 and switched it from T-Mobile to AT&T (work phone). Whats fun is that when I set it down to the right of my keyboard (by the mouse and my Polycom) my cursor starts doing strange and interesting things when its radio is active – cursor movement, right clicks/half-clicks, etc – just weirdness. Now if this were an RF mouse or something, sure, but this is a wired, USB, optical mouse, which makes it seem odd. Any theories? Anyone know if optical mice have an ADC anywhere in the input chain?

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We are looking for article-writers

January 27th, 2009 No comments

At the moment we are only two adminstrators who also writes the articles.
We would like to have other electronics-interested to write some articles here on the TKJ Electronics blog.

Simon, the other adminstrator has got a Graphical Designer to make us a new layout, which would be published when it’s finished!

But please write a comment to this post if you would like to help us.

TKJ Electronics is here

January 25th, 2009 No comments

Finally TKJ Electronics is here.

My name is Thomas Jespersen, and I’m going to tell and teach you a lot about different electronic projects, including the PIC (Microchip).

But right now this blog is quite empty, but take a look at mikroElektronika’s forum

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