Help - Tehkan trackball optical board pinout

[cybernoid]

I bought two 3inch trackballs on eBay.

One is a Happ trackball which is no problem do find out the pinout on the web.

The other one is, as far as i know, a Tehkan World Cup trackball.



I do not have the harness for the boards. I googled around but could not find the pinout.

On the backside of the optic baords i can read "TEHKAN 6008 PHOTO".



On this board above the upper two pins are connected together, so it has only 4 pins with different functions 





I hope, someone knows more about this optical boards and can tell me on which pin i have to connect +5V, GND, Output - A and Output - B. 

TIA

Cybernoid

[u_rebelscum]

If you could post pics of the bottom of the boards, we might be able to help.  From the pics of the top, I think it should be compatible (quadrature signal).  I'm guessing the five pins is just for hooking up the harness correctly, and one of the pins isn't connected (or sharing ground or power).

[cybernoid]

Hi u_rebelscum,

Thanks for your help.

Here are the Pics fron the optical boards:

The one with the 4 pins:

front:



bottom:



The one with 5 pins:

front:



bottom:




I hope, the photos are good enough, that you can see how the pins shuold be connected.

[cybernoid]

Finally i drawn in the connections, that it's more simple to help me.

I really hope, that someone can figure out, how to connect the boards 





Thanks
Cybernoid

[u_rebelscum]

I'm not an electrician of any sort, so... salt 'n all.  I haven't seen a sensor board quite like the ones you have.

Looks like the middle two are x1 & x2, and the outer two (I'm counting the merged 2 pins in the five pin as one common pin) are power and ground.

While it doesn't matter if you get the x1 & x2 flipped, you might have problems with the power & ground flipped.  It would help if I knew what type of transistors were used (the two three-pin black stuff).  Are there any "BEC" or "ECB" or the like labeling on them?  This would identify what the pins do.  (B= base, C = collect, E = emitter)

If there aren't any labels, try lighting either of the LEDs with a multimeter.  Usually, if power flows on the pin side, that pin is the power.  If flows on the resistor side, the pin connected to the pin side is the ground.  The other outside pin would be the opposite, of course.  Try wiring it that way and see if it works in windows (if the mouse pointer goes the wrong dirrection, swap the two inner pins).

BTW, the five & four boards are exactly the same, except the five pin one has the extra pin wired in common with the pin next to it.  (Your diagrams are missing a connection to one the the transistors.)  Here's what I drew yesterday, but got stuck on the transistors & LEDs.

[cybernoid]

I had a nearer look at the transistor, an that is what is written on it:

C1815      Y   8C

I googled arround an came to this solution:

Here ist the pinout for the transistor:



Here is a basic circuit for transistors:



So, according several datasheets, the middle pin of my transistor is the collector.



Do you also think this is correct?

[u_rebelscum]

Looks good, except the info on the transistor says it's 12V+   I've been saying 5 V+ 'cause that's pretty standard; but it's possible the board needed 12V.  Try 5V first though and see if it works.

[cybernoid]

Sorry, i should remove the "Input/Switch" box from the example circuit, because is not the voltage for my transistor 

[cybernoid]

Hi all

I wired up the trackball analog the attached image and it works perfect   

I tried several mouses and had success with the Microsoft Mouse Port Compatible Mouse 2.1A 2-Button Mouse P/N: X03-61001 (newer Microsoft ones with wheel did not work for me).

Thanks for your help  u_rebelscum 

Cybernoid

[u_rebelscum]

I wired up the trackball analog the attached image and it works perfect   

Glad to hear it worked!