A while back I was given an old but potentially functional ultrasonic cleaner.
How much! ;-(
It seems to work in that it powers up and makes plenty of noise and does make some holes in silver foil, but I'm not sure of how much difference / importance things like 'de -gassing' may have to it's functionality, or additives (detergent?) in the water?
I think it's leaked (possibly the built in drain hose / tap) as the inside of the base has areas under the plumbing with a while powdery deposit (aluminium oxide?) that seems to be dissolved with vinegar. It's also affected the ally chassis of the SMPSU but not the PCB luckily and I think will all clean up ok.
The only other issue is the LCD display is a bit weak but there many be a contrast control on there, once I get to it. There is also what looks like thermister hanging off.
If all else fails I might be able to replace their control electronics / display for an Arduino?
Any general advice on these things please? Like, do you think it's worth (in the spirit of d-i-y) spending any money / time on this one or buying something new from China?
Cheers, T i m
p.s. A guy has done an interesting pictorial overview of the internals of the same model here (and I have posted a q about the user manual there but no reply as yet):