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Nice Work Zappatore !!! Do you have the IC numbers on the right side of the circuit board [top photo] ? Hopefully it is not a pic-chip on the bottom right side !!
Thanks again for the nice photo's . What kind of depth does this machine get , would be a great winter project too .
Hello Eugene, thanks for asking, the first IC on the top right is NE5534, the second near the trimmer 2K red LM393, last down cables near CD 4060.
The circuit is powered by 3 volt batteries 9.
Performance is not just excellent, 1 Euro approximately 25cm.
I do not know English, I'm using the translator, I'm sorry for the ignorance.
Best Regards.
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