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I think because of the lack of insulation i can't get a signal across the wires

I'm not looking at the wires now but i believe that they are all the same with no insulation between the power and ground.

AC signals flow along the surface of conductors, so there's no reason for a solid wire. Using strands of smaller wires gives you more surface area for a better signal, and better flexibility. Since you don't need a solid wire, but lots of smaller, thinner wires wound together, string is often used ...

Ok so i have everything i need i took apart the headphones and the wires look wierd. Its like copper wound around string. Whats up with that?

A 1K resistor should do the trick right?

If i understand correctly TTL is just voltage that is turned on and off correct. So does it matter if its 5v on off or 2.5? What im asking is will the resistors interfere with the transmission of the signal?

Im pretty sure the psp uses TTL so if im not sending it to my computer i dont need to convert it to rs232. It should be fine right from the ADC to psp right?

Ok so the ADC i have outputs TTL/MOS do i need to convert that to rs232 before i send it to the PSP?

I guess ill try lua at first just because its easier. The data im sending isnt do or die. As long as it doesnt lose more than like 20% of the data id probably stillbe alright. I wont really know until im at that point. I tried to set up the pspsdk but it keeps saying make is an unrecognizable comman...

It seems that LUA is a little slow when it comes to serial data transfer. Is anyone working to make it any better or is it a lost cause?

How slowly is so slowly and how many bytes does it lose?

What exactly is the problem with lua and the serial port? I wont be reading data from an ECU or anything else. The data would be coming from the ADC then it would be sending data back out to the DAC. Edit: Do you mean like changing the baud rate? Im not sure thats the same thing but im going to read...

The psp would be controlling the solenoid digitally because of the DAC. I have to figure out where to get the 5v Vref's from. Also do you recommend using C instead of lua?

If i can get an ADC that is compatible with the psp serial port i might not need that micro controller at all. I only need one in and one out at a time technically. The map sensor puts out a voltage from 0-5 which goes to the psp and then based on that the psp puts out a voltage from 0-5 to the sole...

There is a micro controller that is used with the Megasquirt (www.megamanual.com) that is a 68HC908 processor. It has the ADC's built in and comes pre programmed. The hard part would be then controlling that via psp's serial port. Also what exactly is used to control voltages digitally. The solenoid...

That really has nothing to do with ADC's at all. Finding the right ADC is proving to be the hard part. Im guessing theres such thing as a DAC also? Im not sure.

Hello. Im working on a little project for my car that involves my psp using lua as a computer. I need to be able to have serial in and out which im told lua can do. Anyway i need a 5v analog to digital converter and a 0-5v digital to analog converter. Im pretty new with the electronics part so im no...

My first question is can you read data through the serial port with it. Second i have a 1.51 psp how can i downgrade to 1.5? There used to be up to 2 then down to 1.5 but i cant find that anywhere.

Im gonna go with jimparis on this one

Everything im reading says the psp is 2.5v

Ok so i got all the stuff i need to do this. I got a 5 v regulator and im gonna check it with a multimeter after its all together. As long as the data is 5v or below im good right?

Now how do i adjust the baud rates to be the same?

There are free programs out there that work with obd 1 so its a matter of porting them i guess. As for the 12 to 5 v conversion ill have to do some research

How do i set my psp to record any data coming across the line?

I dont even know what that 12 v is for

Pretty much what im asking is how can i make a setup to recieve any kind of data from the obd.

Im trying to collect data from my cars OBD1.5 port to my psp iv been doing research and it seems all i need is a ground and a data line from the obd port. http://www.aldlcable.com/uploads/obd2pinout.gif Whats the easiest way to do this? http://www.home.aone.net.au/techedge/vehicle/2tran.gif I also f...

My gps requires a usb to serial software converter does it sound like the right kind of gps?

Will this work with other gps's? afaik as long as the nmea sentences are the same it should work right?

Has anyone seen the gps someone has made? http://forums.qj.net/showthread.php?t=26185&page=1&pp=10 . anyway he used a PIC circuit to make the transfer from the gps mouse to the psp faster. He claims lua is at fualt. is there any way to get rid of the extra information sent from the gps mouse...