I've built a circuit to fire the shutter release on my camera. It uses the digital pin output from an arduino driving a 4N25 optocoupler.
The arduino digital pin goes through a 330ohm resistor to pin 1 of the 4N25. pin 2 goes to ground.
The shutter release is caused by closure across pins 4 and 5 of the 4N25.
It works but it doesn't 'completely' release. My camera always senses the shutter button being 'slightly' pressed.
Is there a way to remedy this?
Thanks in advance.
mark
issue with arduino controlled optocoupler
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- zener
- Posts: 4567
- Joined: Sat Feb 21, 2009 2:38 am
Re: issue with arduino controlled optocoupler
Short answer, you can try a bigger resistor. Long answer, we would need to do some measurements to see what might be going on, and see the connections, etc.
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Re: issue with arduino controlled optocoupler
Thanks.
I think I found the problem - a bit of solder residue between the emitter and collector.
seems better now.
I think I found the problem - a bit of solder residue between the emitter and collector.
seems better now.
Please be positive and constructive with your questions and comments.