Author Topic: what did i do wrong? (Read 6624 times)

COD3-BRKR · « **on:** July 26, 2010, 07:34:52 PM »

so i was tryng to replace the d-pad with a psp analog stick and this is what i did.

(correct me if im wrong) the solder points for the psp analog

the solder points for d-pad

my soldering

for some reason it failed does anybody know what happened
whats wrong the solder points on the dpad or the analog stick?

please help

DARk_ANGEL · « **Reply #1 on:** July 26, 2010, 10:01:53 PM »

i wanted to do the same thing but i had to make a metal ring in side the psp analog stick for ground or something that i need help!!!!

COD3-BRKR · « **Reply #2 on:** July 27, 2010, 11:25:18 AM »

Quote from: gunner7553 on July 26, 2010, 10:25:58 PM

here this is the mod your trying.
https://www.acidmods.com/forum/index.php/topic,27423.0.html

do i have to use the razor for it to work?

gunner7553 · « **Reply #3 on:** July 27, 2010, 11:37:18 AM »

Yes you need the razor for this to work, you can buy one or you can make one.

COD3-BRKR · « **Reply #4 on:** July 27, 2010, 11:42:59 AM »

Quote from: gunner7553 on July 27, 2010, 11:37:18 AM

Yes you need the razor for this to work, you can buy one or you can make one.

what about this would it work?
https://www.acidmods.com/forum/index.php/topic,33789.0.html

Modded Matt · « **Reply #5 on:** July 27, 2010, 12:59:34 PM »

I need to think about this one for a bit. I feel like the answer is looking me in the face, but cant put my finger on it, its been a long day at work, and will be going home soon. but

I would assume that the dpad works just like the rest of the cg buttons, and each terminal needs to be grounded to activate. this means you need a comon ground in the nub all I see is up,down,left,right... but what are they conecting to when activated????

laxboy · « **Reply #6 on:** July 27, 2010, 01:05:57 PM »

just wondering doesnt it have to be connected to the ground, I only see 4 wires going to the up down left and right but nothing connecting it to either hte power or the ground?

gunner7553 · « **Reply #7 on:** July 27, 2010, 01:38:12 PM »

you need a ground point that all the buttons would share, that's where the razor comes in to play.

COD3-BRKR · « **Reply #8 on:** July 27, 2010, 03:39:26 PM »

thanks guys,but where would i connetct the ground to?

gunner7553 · « **Reply #9 on:** July 27, 2010, 03:54:26 PM »

Use a meter and test the bored. each button uses a ground so there s a start, and same for the nub. Ill look around and get back to you.

laxboy · « **Reply #10 on:** July 27, 2010, 04:17:25 PM »

The ground is the negative spring on the board

COD3-BRKR · « **Reply #11 on:** July 27, 2010, 05:03:40 PM »

Quote from: laxboy on July 27, 2010, 04:17:25 PM

The ground is the negative spring on the board

i knew that but where would i connect that to the analog stick?
to like each pad or what?

gunner7553 · « **Reply #12 on:** July 27, 2010, 05:09:22 PM »

Yes the ground would go to each button.

COD3-BRKR · « **Reply #13 on:** July 27, 2010, 05:23:49 PM »

alright i did just that lets see if it works.

Post Merge: July 27, 2010, 05:31:27 PM

nope i hooked it up turned on the controller moved it to the left and it moved the menu but then it stopped working and the d-pad wont work. what the

happened?

gunner7553 · « **Reply #14 on:** July 27, 2010, 09:22:02 PM »

you might have burnt out a resistor, or something else, you should start checking all the points on your d-pad and the rest of the mobo, and check the nub.

laxboy · « **Reply #15 on:** July 27, 2010, 09:40:43 PM »

i belive its ur ground still it does not go to ground of each button here

pin 8 also known as the ground goes to the negitive spring on your controller board this is your ground connect the ground to the black dot. only picture i can find with the time i have.

DubbedTheBeast · « **Reply #16 on:** July 30, 2010, 11:02:56 PM »

maybe you can use a transistor to connect each side of the buttons. if you use a npn transistor solder the base to the thumb stick you are using then use the other two pins and see witch side of the buttons you need to solder too, you should be able to make the connection that way. you may want to use a resistor between the board and the transistor though.

802Chives · « **Reply #17 on:** August 01, 2010, 06:56:15 AM »

Quote from: DubbedTheBeast on July 30, 2010, 11:02:56 PM

maybe you can use a transistor to connect each side of the buttons. if you use a npn transistor solder the base to the thumb stick you are using then use the other two pins and see witch side of the buttons you need to solder too, you should be able to make the connection that way. you may want to use a resistor between the board and the transistor though.

Very good advice...........

The main issue which has been adressed above, is that the psp analog stick is just that ANALOG! You are trying to replace the Dpad which is DIGITAL. It has been suggested that you should use a RazorX board to convert the analog to digital. RazorX is mechanical solution to the problem, however the boards can be hard to find these days.

Dubbed the beast is suggesting an electrical solution to the problem using transistors. This is a good exercise but it may not be the simplest solution to the problem. Different people would attack this problem differently, personally I would use a microcontroller, but if I had to do it digitally, I would op amps and possibly some inverters, to make compator circuits to provide the ground when a certain voltage threshold is met.

GhoSt · « **Reply #18 on:** August 03, 2010, 01:24:31 AM »

if you are interested in reading up on how to do conversion with transistors check out markolise's work from a while back, this was on a psp but the concept is solid https://www.acidmods.com/forum/index.php/topic,33789.0.html

802Chives · « **Reply #19 on:** August 03, 2010, 07:05:59 AM »

interesting link ghost, however i dont see where he was ever successful with implementing the transistor circuit. He is almost there, using NPN and PNP for opposite directions, however I am not sure he actually made a working solution... and if he did his schematics are incorrect and he never posted it. (He got it half working but he was at a dead end with the way he was attempting it as I now see... wish i had seen the topic when he was here)

Op-AMP comparator circuits are a sure winner here.... i mean you can have hysterisis in the control and everything

DubbedTheBeast · « **Reply #20 on:** August 05, 2010, 08:32:18 PM »

after looking at that thread i think that what i suggested wont be so easy. i came back here because i would really like to see this working. if someone can figure it out i would like to know how to do it. i think it would be a really cool mod.

Fareham dave · « **Reply #21 on:** October 14, 2010, 07:21:30 PM »

have u asked spurgurgle bout this? i am sure he has done something along those lines and had it working?

spurgurgle · « **Reply #22 on:** October 15, 2010, 09:57:26 AM »

yes dave i did do this and here's the proof

clicky click

however as far as i can tell from the photos the main issue ur having is grounding....... well ur using a matrix pad well it looks like one to me.....(not that i can tell as the pics are dark) and matrix dont have common ground for the dpad or any of the controller really so theres ur problem..... start again on a cg 1 or 2 and it'll work fine as long as ur psp nub mod is good...... mine took a little tweakying to get working and feeling good.. but tis fine now....

if u are using a cg it will be ur modding of the nub... look at my thread and the thread linked in it and u'll find ya answers

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Author Topic: what did i do wrong? (Read 6624 times)