Search found 312 matches

by codeman
Wed Jul 20, 2011 9:38 pm
Forum: 2000's Gaming
Topic: PS2 slim board cutting (big pictures)
Replies: 0
Views: 2286

PS2 slim board cutting (big pictures)

For those of you with a 79000 series board, the one that has that annoying little USB piece sticking out the side making the board not square...this is how I was able to cut off that little piece from my board and still get it to work. I haven't seen anything like this around the forums, so I though...
by codeman
Fri Jul 15, 2011 6:20 am
Forum: Case Construction
Topic: Bondo or Epoxy?
Replies: 3
Views: 6253

Re: Bondo or Epoxy?

I'm trying to secure a variety of different plastics to each other. A zenith screen case, various PS2 case pieces...both ABS I think
by codeman
Thu Jul 14, 2011 6:00 pm
Forum: Case Construction
Topic: Bondo or Epoxy?
Replies: 3
Views: 6253

Bondo or Epoxy?

Which is better for holding things together structurally? Which would give the most support for the thinnest layer of stuff used? Anyone have any thoughts?
by codeman
Wed Jun 22, 2011 6:12 pm
Forum: Technical Questions and Answers
Topic: Fan control circuit
Replies: 1
Views: 1142

Re: Fan control circuit

Just in case anyone was actually wondering, I just built the circuit and it functions as designed. The only missing piece is the actual thermal sensor, which I still need to buy. But if it works the way its datasheet says, then the whole thing will work properly.
by codeman
Mon Jun 20, 2011 10:52 pm
Forum: Technical Questions and Answers
Topic: Fan control circuit
Replies: 1
Views: 1142

Fan control circuit

Hi, So I have yet to implement this myself, but I plan to within the next few weeks. But it simulates the way I expected it to work. The circuit produces a switching signal that changes the speed that your DC fan runs at. The MCP9700A is the temperature sensor...I modeled it with a voltage source be...
by codeman
Sun Jun 12, 2011 6:38 pm
Forum: 2000's Gaming
Topic: PS2 RGB issue
Replies: 4
Views: 1921

Re: PS2 RGB issue

That was exactly the problem AngelArm. I didn't know I had to set the system to output RGB. Thanks so much, it looks beautiful! :D
by codeman
Fri Jun 10, 2011 1:51 pm
Forum: 2000's Gaming
Topic: PS2 RGB issue
Replies: 4
Views: 1921

PS2 RGB issue

I've been trying to get RGB to work on my PSOne screen, but all I can get is video with a very green tint. I've followed all the threads and I've done everything that I've seen in them, and I still get the green picture. I lifted capacitors CV53, 54 and 55, and tied the RGB signals to them, and conn...
by codeman
Wed Jun 24, 2009 10:38 pm
Forum: Technical Questions and Answers
Topic: Help Me Adapt This Circuit
Replies: 5
Views: 1014

Re: Help Me Adapt This Circuit

Replacing it with an NPN transistor should work....if you change the resistor values. R1 and R3 are huge, so there's probably just not enough base current drive to turn the transistor on. A MOSFET doesn't have to worry about that since the input gate is basically just a capacitor and no DC current n...
by codeman
Fri May 22, 2009 6:16 pm
Forum: 1990's Gaming
Topic: N64 Liuhu Edition
Replies: 122
Views: 19893

Re: N64 Liuhu Edition

I've never encountered the button problem you're having, but I did have something similar to your joystick problem. You don't have an oscilloscope available to you by any chance do you? The problem I had was there was a lot of noise on the joystick lines because my switching regulator was in very cl...
by codeman
Wed May 20, 2009 5:20 pm
Forum: Technical Questions and Answers
Topic: Low Battery Mod Using LM-741
Replies: 3
Views: 894

Re: Low Battery Mod Using LM-741

Well just based off my experience using the thing as an amplifier...and reading the datasheet...a negative supply is needed. Also looking at the schematic representation, there are current sources in there that need to be biased with a negative supply. Unless of course you bias your inputs properly,...
by codeman
Wed May 13, 2009 8:53 am
Forum: Technical Questions and Answers
Topic: Low Battery Mod Using LM-741
Replies: 3
Views: 894

Re: Low Battery Mod Using LM-741

I'll be honest, I didn't read the whole thing. But just a word of warning...you probably don't want to use the LM741. It's not a single supply op-amp, which means you'll need a negative voltage rail for it to work. Search for a single supply op-amp and use that instead.
by codeman
Thu May 07, 2009 10:11 am
Forum: 2000's Gaming
Topic: PS2 power
Replies: 0
Views: 571

PS2 power

Has anyone done any thorough testing about the PS2 power requirements? I've searched the forums but haven't found anything significant. I know that the power cube outputs 8.5v....but it is extremely unlikely that the core processor and support devices run off of anything higher than 5v. There has to...
by codeman
Fri May 01, 2009 8:57 am
Forum: Technical Questions and Answers
Topic: A question about Powerpacks that plug into the wall
Replies: 3
Views: 772

Re: A question about Powerpacks that plug into the wall

Yeah...what he said. Getting a wall adapter is the easier way to go. I like this one:
http://www.jameco.com/webapp/wcs/stores ... tId=380139&" onclick="window.open(this.href);return false;
by codeman
Fri May 01, 2009 8:47 am
Forum: 1990's Gaming
Topic: GameShark Pro shenanigans
Replies: 15
Views: 11268

Re: GameShark Pro shenanigans

Analog electronics are way cooler than Digital electronics!

Ok...that is pretty cool, I'll admit it. Is there a way to update the firmware of the gameshark using this method? Or are there no further updates beyond the 3.3 version?
by codeman
Fri May 01, 2009 8:39 am
Forum: 1990's Gaming
Topic: Is this a sensible and cheap way to get 3.3v for the N64?
Replies: 15
Views: 6241

Re: Is this a sensible and cheap way to get 3.3v for the N64?

The LM317 will still have bad efficiency as well. All linear regulators work by basically using a pass-transistor as an adjustable "resistor". So it senses the output and adjusts the resistance necessary to keep the output at the voltage you want. So it's basically just burning power to keep a const...