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

Step 2Break open the mic

Break open the mic
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!