Hi. As the title suggests I have a 400d and have tried to use it in astrophotography. I have upgraded from a 350d which has been modified to have a better response across the spectrum. The 400d has undergone the same procedure however the shutter release cable I used to control the 350d from my computer (all automated) no longer works.
I have found a link to a site which decribes an optoisolated circuit which uses a serial com connection. Unfortunately as is common my laptop only has 1 com port, a lpt port and a parallel port. On the serial com one I have connected another appliance.
My question is: before I go to the nearest shop and buy a serial to parallel connector and build the cable can anyone assure me that the signals used bytthe serial port circuit will be perfectly "rendered"" by the serial to parallel adapator? The circuit employs the signal from pin 7 + some resistances and diodes.
Thanks!
P.s. If this works I will post some pics!
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