You might find old electronic products that are not supported anymore. If you reverse engineer circuit board parts from these, you can fix and improve them. Many people do this to repair old gadgets or make them last longer.
Some want to avoid planned obsolescence. Sometimes, you need to reverse engineer circuit board layouts if you cannot find schematics or repair guides. [Read more…] about Discontinued Electronic Products: In-depth Analysis of PCB Reverse Engineering and IC Unlock Techniques