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Ultrasonic Antifouling
Ultrasonic project to restrict growth of algae and barnacle fouling on exterior boat hull.
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Since the least expensive system i I could find was us$500, i've been looking at DIYing a simple system using components from ultrasonic cleaning systems.
A survey of retail ultrasonic antifouling systems indicates that they utilize frequencies between 25 and 60 kHz, and that they deliver a pulse every minute or so, rather than running constantly as do US cleaners. Some of the nicer ones deliver pulses at different frequencies, claiming that each frequency targets a specific organism.
I figure operating the switch with a simple microcontroller could effectively deliver pulses. Haven't found inexpensive driver boards that support multiple frequencies. Pulsing also might sidestep the considerable cooling needs most of these boards require.
Waterproofing for a marine environment is always a tricky challenge.