Building OPA Impedance Buffers

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

Meal Worm Action: Using the Dual OPA Buffer

meal worm sounds

Headphones Recommended – Just a fun little sound experiment with our lizards food. I attached 2 – 35mm piezos to a small tub of meal worms via my Dual OPA field buffer and then into the trusty Mix Pre 6 II – kind of what you would expect, lotsa scratchy little legs in the saw … Read more

Inside a dirty Korg

                  Looks like someone poured a coke on top of this bad boy, dust bunnies have invaded as well. Time to give this board a good cleaning. Normally I would not hesitate to bust out the WD-40 for this job, but the “buttons” are actually plastic switches … Read more

POTAR Design Concern