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Overview: We used the MIC jack of a camcorder to detect when the camcorder is on. We built a low-voltage solid-state relay to detect the MIC jack and...
Here's some photos of our waterproof setup with camcorder, box, remote waterproof camera, LANC remote control button, etc.
Here's what we need to build a solid state relay. Just by selecting the proper FET's you can tailor this solid state relay circuit to many uses: it c...
Here's the circuit. It is useful for many things, but as the example for our camcorder MIC connections: IN+ and IN- connect to the 8-AA battery pack ...
I covered the finished circuit in hot-glue to protect it.
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