It was mostly for surface finishing purposes. I wanted to see if I could get away with sanding the resin and still have it look good. I don't show it in the video, but I sanded one side of the test piece and polished it and it looked pretty good so I went full tilt on the real thing. I wasn't too concerned about the resin casting so I just went ahead and did those at the same time.
I had an idea to pot in epoxy a complete working computer and all the wires coming out of it ( quite long ) and have that computer be all weather proof for a lifetime... Also wondered if I could pot a 2.5 inch hard drive... they say don't cover the breather hole but... that would need to be done before pouring epoxy over it so it doesn't go inside. then that drive could literally be burried underground and have the wire harnest come out and be connected to a sata port at the surface... sata cables can be very long...
The sea mammal research unit at University of St Andrews build data logging devices that they attach to whales and seals. They cast the circuitry in resin just like this so it can fully submerge and record the data they collect from the animals. They used a vacuum tank to remove air bubbles. They attach a variety of sensors including light, temperature, salinity, pressure (depth), and orientation so they can figure out the diving behavior of the animals. The sensors also include RF and/or satellite transmission capabilities that send the data back when the animal surfaces to breath and the salinity sensors detect they are at the surface of the ocean.
