which board for simple triggered analog output ?

Hi,

I would be please to haveyour experiences and recommandation about DAQ 
board.

I have a very simple function to implement and I'm looking for a cheap 
and reliable solution to do it.

The problem is to output a analog waveform (top hat) after a trigger 
received from a camera ; a more complete description follow the message.

If someone can inform me about which board definitly work with comedi 
and have these features; I'm a bit lost in the large number of board and 
the lack of a "validation function with comedi databases "

Thanks

Gauthier


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I develop a high speed image acquisition software and I would interface 
a daq to drive the laser source. The idea is to trigger a arbitrary 
function from the camera signal to modify the laser power ( voltage of a 
acousto-optic crystal).

The typical scheme would be :

a rising edge signal is emitted (frequency fe is between 10Hz and 1kHz) 
by the camera connected to comedi_dio#0

the analog output is triggered by the digital input and start the 
arbitrary function ( a top hat function, 0V from t=0 to 0.8/fe, then 5V 
from 0.8/fe to 1.2/fe, then 0V from 1.2/fe to the next trigger from 
digital input )( note I need to be non-reactive to the trigger which 
appened at 1/fe ).
I used to do this with a external function generator and I would like to 
use a daq board.

Does anyone know a well supported by comedi board which have the needed 
function ( analog output triggered by digital input, +5V ), as I need 
several boards I also looking for a "not too expensive board" I needn't 
MHz stuff.
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Received on 2004-10-26Z07:46:23