<< APPENDIX 1

Appendix 2. Getting the 9v and/or the 5v from the inside the PC

This will require you to open the computer. So if you don not want to do this you don't have to. (although it is almost impossible that you break anything with this)

Before starting, we are going to make sure that you have a free power connector. Open the computer, and it looks for the power supply (it is one the little box attached to the top rear of the case with a bunch of wires coming out of it). Most of the wires end in with connector that can connected to the hard disks, CD-ROMs, etc. They are similar to this:

conector-alim.gif (6666 bytes)

 

Make sure the colors are the same. If you do not have any free connectors. In this case you can buy an accessory that makes two connectors from one single one, (y-adapter) but you risk to overload the power supply (unlikely).

You can see that red wire provides 5v (+) and the Black wire is ground (-). Directly connect the hole of the 5v in the connector to feed pad if our parallel is not able to provide enough power. Connect it to pin 5 of the pads. (see below for more on how to do this).

If what you need is 9v or too lazy to get and external power supply, you can get that from inside too. We are going to obtain them of the yellow wire (+) and black wire (-). No, I am not mistaken, yellow wire is 12v, but for that we have voltage regulator L7809CV:
 

   COMPONENT (para 9V)

DIBUJO

1 voltage regulator L7809CV

regulador.gif (4455 bytes)

 

 

This device will transform the 12v into 9v, connect the regulator and wires this way:

esquema-alim.gif (6838 bytes)

And that is it. You can get rid of your troublesome power supply and enjoy this connection. You will not need to plug in a power supply as when you turn on you computer you'll have power to the pad(s) also!

>> APPENDIX 3