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Pentax DSLR cable shutter release from hands-free cell phone kit

Step 2Break open the mic

Break open the mic
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Be destructive, but gentle
You may not get the same model kit, so some experimentation is required.
Inside the microphone box was a tiny circuit board hooked to 4 wires. I plugged in the kit to my camera for testing. Don't worry, there' s no current in these wires. I took my knife and shorted various combinations and observed the results. I found that two are ground wires, and the other two have functions:
Red: focus
White: shutter
Copper: ground
Blue: ground
By connecting the Red to a ground, the camera focused. Wonderful news.

We will now make button to do this work for us.
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Author:eagleapex
I'm a digital artist from South Philadelphia. I love to make things and share. I hope you dig my stuff!