Reuse electrical components from discarded objects

What to look for on discarded electronic boards that might be useful in electronic experiments like a joule thief, amplifier, etc. All the basics: LEDs, plugs, switches, resistors, diodes, inductors, capacitors, …

These come from routers and switches.

WARNING: Always use proper safety precautions when soldering or desoldering. Electronics contain toxic materials. Recycle waste. Do not work on high voltage circuits. If you don't know, learn first or don't.

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