Hello,
I've build a wiring to take high-speed pictures of waterdrops.
The wiring diagram looks like
this one. The camera connection is on the top right (digital pin 13 for the shutter and digitial pin 12 for the focus).
The pins are from an Arduino UNO.
The restistors are 220 Ohm - not 75 as written in the diagramm (this is wrong).
The frontend which I use is Droplet. In Droplet I can configure the start time and the length for a signal. I.e. valve 1 start at 0 and length 40 will open the valve 40ms.
Flashes, magnetical valves and camera are working. The one and only I have is with the duration with the signal for the camera shutter.
I need minimum 280ms signal length, for the shutter release. If I choose a time below, the shutter doesn't work.
I tried it also with mirror up before shutter. But also there the signal length must be min. 280ms that the shutter release.
From a guy with a Canon I know, that he need 50ms signal, that the shutter release.
Here are my questions:
I have a normal stereo cable with an length of 1 meter. I think this should not be a problem. On the picture of the original Pentax shutter release cable I can see a thickening at the end of the cable. Can it be, that there is a resistior build in?
Have anyone an idea how I can reduce the signal length for the shutter release?
Thank you.
Thomas