Dual OPA Impedance Buffer

Field Recording: Bird Song and Movement, through a metal fence with contact mics

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birds on a fence thumbnail

Headphones Recommended I attached a pair of 35mm Contact Mics (via my DUAL OPA Impedance Buffer) to a metal fence at Gum Grove Park in Seal Beach and waited for some birds to drop by. I was mainly curious if the vibrations from the bird movement and calls passing through the fence would be enough … Read more

Building OPA Impedance Buffers

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completed Alice Mini board

Hot air reflow is so much easier than I thought it would be. The trick to getting everything placed correctly is to eat a good breakfast and not drink too much coffee. I am using these OPA “Alice” circuits in the hydrophones, dual impedance buffers, and Sound Urchin XLR products. They use a high definition, … Read more

POTAR Design Devices