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*NEW Gamepad hack help (large PCB pic inside)

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jirovede:
Hi, I am doing a gamepad hack for a standalone CP and unfortunately I am pretty new to solder and such. I have a pic of the gamepad cb here and was wondering if someone could indicate where i need to solder for the directional pad and the 6 buttons (dont worry about the shoulder buttons). There also appears to be a black substance over the solder points, I am to scratch those off correct. Thank you for your time gentlemen.

Tiger-Heli:

--- Quote from: jirovede on June 28, 2004, 02:07:35 pm ---There also appears to be a black substance over the solder points, I am to scratch those off correct.

--- End quote ---
Only if you decide to solder to those points. Looks like a VERY easy pad to hack.  See below:  (I'm assuming a SF layout for the buttons).

Red - Common point for all directional pads (Only need one wire, and only need to attach to one of the solder points).
Yellow - Directional pad Right (Only need one wire, and only need to attach to one of the solder points).
Slime Green - Directional Pad Down
Dark Blue - Directional Pad Left (Only need one wire, and only need to attach to one of the solder points).
Magenta - Directional Pad Up
Sea Green - Common point for all buttons (Only need one wire for all).
Medium Blue - Button 1
Purple - Button 2
Teal - Button 3
Brown - Button 4 (Only need one wire, and only need to attach to one of the solder points).
Orange - Button 5 (Only need one wire, and only need to attach to one of the solder points).
Pink - Button 6 (Only need one wire, and only need to attach to one of the solder points).
Post back if you need clarification.

jirovede:
Ok I think I got it (like the pic I made from yours?). So for the red common ground I can daisy chain that to the sea green and then do what with that wire (ground it to a screw inside the CP box?)? Also , I have to be careful not to bridge the solder points otherwise it will screw it up right (pray I won't). Thank you for your help.

Tiger-Heli:

--- Quote from: jirovede on June 28, 2004, 02:57:14 pm ---Ok I think I got it (like the pic I made from yours?). So for the red common ground I can daisy chain that to the sea green and then do what with that wire (ground it to a screw inside the CP box?)? Also , I have to be careful not to bridge the solder points otherwise it will screw it up right (pray I won't). Thank you for your help.

--- End quote ---
Oooops, I screwed you up - Ground was the wrong term.  Common would have been better.

You connect one wire to the red terminal and run that to the COM terminal on all your joystick microswitches.  You connect one wire to the Sea Green terminal and run that to the COM terminal of all your buttons.  You DO NOT connect the red and Sea Green terminals together nor to an actual ground.  All other wires go to the NO terminals of the appropriate swithch.

And yes, bridging solder points will most likely result in a stuck key or one key activating two button presses - best to avoid if possible.

jirovede:
Ah ok now i get it, thank you very much. I really appreciate it. Any tips on how not to bridge the solder points (perhaps hot glue the points next to the ones I am suppose to solder that way if the do come close the hot glue will protect them from touching. Eh? ???

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