eye tracking with media lab (case 19711)

[JEC]

Hi,

I've another question: is for sure that directRT send TTL signal by LPT port assigned like this: D7 D6 D5 D4 D3 D2 D1 D0 (I suppose this are pins from 1 to 8)? Should I ask someone to test this with an osciloscope?

I've to connect PC's LPT output with a D-15 port from a powerlab recording equipment, so I have to build up a connector to do this and I don't want to be "responsible [for] any explosion which may occur".

thanks a lot

There's a pinout of the parallel port here:

http://www.beyondlogic.org/spp/parallel.htm

An oscilloscope (or even just a voltmeter) is always a helpful tool to have.

[natxo]

What I understand is that pins 2 to 9 from the LPT1 connector are the ones which send data, I'm ok? Are this the pins which DirectRT uses to send information? Or this depends on which PC it is running?

I need to build a connector so I need to know which 8 pins I should select

thanks again

[JEC]

What I understand is that pins 2 to 9 from the LPT1 connector are the ones which send data, I'm ok? Are this the pins which DirectRT uses to send information? Or this depends on which PC it is running?

I need to build a connector so I need to know which 8 pins I should select

thanks again

Those 8 pins will be common to any PC containing a parallel port.

If you only need a single trigger line, I'd select 'D0' for convenience.

Then, by sending the value '1' or '0' to the PC's parallel port, you'll be able to control the state of that particular pin, either high or low.