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What is CHIP - ON BOARD (COB) || WHAT'S INSIDE || EXPLAINED || inShorts - YouTube
How Chip-On-Boards are Made - learn.sparkfun.com
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Very new to this. I found a weird black blob on an old calculator. Anyone know why it's there? : AskElectronics
What is the purpose of this black blob? Is it possible to remove it? : AskElectronics
Circuit Board Builder: Whats Pcb
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Black Goop used on PCBs
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What kind of components are black blobs on a PCB? - Electrical Engineering Stack Exchange
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Suggestions for removing black 'blob' - T&L Publications
How Chip On Board (COB) Circuits are Assembled | Technical Domain
How Chip-On-Boards are Made - learn.sparkfun.com
