LM1875 layout

[wintermute]

Has been for 30+ years.

They have a roll of shrink tube with a "- - - - -" stripe to mark the negative leg. Often with a fat stripe so a wrong-way cap will stand-out on quick inspection of board.

I do not know why draftsmen mark "+" and cap makers mark "-". But we should be able to figure it out.

I think Nigel was talking about the silkscreen on the first board posted 😉 The curved white stripe next to one pin for the electro caps....

Tony.

 

[scottjoplin]

That makes more sense, I thought they were smiley faces 😱