Sonar came out at 6g when miniaturized. A tri-state op-amp would still be a lot better. The h-bridge is a buster to solder & a real nail biter during the 1st 30V power up.
The ferrite inductor is a weight buster. Getting 30V takes either lots of ferrite or lots of ceramic. Any 6x voltage increase requires storing a lot of charge. Connecting it to the CPU requires the actual aircraft, to route the cables.
After spending a good 8 hours fabricating without even getting to the camera, the massive complexity of the electronics & boredom required to do this simple thing became obvious. The complete electronics would come to 12 hours, not counting airframe assembly.
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