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Epoxy Blob Excised Out Of Broken Multimeter, Replaced With A QFP

The black blobs on cheap PCBs haunt those of us with a routine of getting matters aside when they are unsuccessful. There is no aspect amount to look up, no pinout to probe, and if magic smoke is launched from the epoxy-buried silicon, the full PCB is toast. Which is […]
On the left, an image of a COB on the multimeter's PCB. On the right, a QFP IC soldered to the spot where a COB used to be, with pieces of magnet wire making connections from the QFP's pins to the PCB tracks.

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