Hello, I was watching some Youtube videos and a guy showed this esc: https://i.imgur.com/3bYo8mK.png (Edited) [2] The strange thing that I noticed is the black glue-ish thing on the board. what is that? Thanks

Circuit and black glue-ish thing

anon57585045 August 19, 2021, 1:44pm 2

Please not a discourse link. Post the image here according to the forum protocol.

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