Psp nub idea/ question

[neverused]

I was wondering if it'd be possible to use a variation of sifuf's diagram or some other similar idea to use a psp replacement nub to replace a four way directional pad. I know of the razor and a2d projects, but I would like to be able to cut the circuit out with a switch(s) to switch back to an analog nub quickly rather than have it as a dedicated switch. Does anyone have any suggestions as whether this would be feasable? I would think so, but I have yet to try it.

Thanks,
neverused

 

[neverused]

Ok, no ideas? Well I found this article, but I don't have the time to hash it out or even know if it can help, but it might be worth a look by some of you guys.

http://www.acidmods.com/forum/index.php ... 789.0.html

An image to show you what's in the link:

 

[McBlasian]

I've been wanting to do this for ages! Does the circuit board actually work?

 

[neverused]

I asked the author of the thread I referenced for any additional info. This was his reply:

Sadly I hit an unexpected snare with the project. The modifications with the nubs worked, but the circuit sort of not really worked.

I made several modifications and configurations to the simple circuit but it never worked properly. I did end up using NPN-PNP-NPN-PNP style configuration. I said on the post that the 1-2 and 2-3 and 3-4 and 4-1 make the movements.
I had the test circuit configured in such a way that it would power 4 3v LEDs, strangely though (and this is the snag) I put the Positive voltage in through 1 and 3, I think that was what worked best. 1-2 would work fine turning on that LED and leaving the others off, 2-3 also worked only illuminating the 3 LED very faintly. Then 3-4lit up both the 3rd and 4th LED.
And consiquently 4-1 wouldn't light up, so... thats where I stoped.

If you want I can draw diagrahms of the circuits i tried, and if you have a better understanding of Electronics than I do, fell free to tell me what I missed. I'm sure a low level transfer circuit of some kind could easily do the trick, but I just lack the know how to finish it.

I have since asked him for any diagrams or extra info he has, hoping that the guys here will be able to work with it.

 

[McBlasian]

I hardly understand that, sorry. I'm trying to learn more about circuits and what-not but it's hard with exams and assignments so often. Hopefully someone else on this site will figure it out.