What are these black things for?

What are these black things for?

Attached: COB IC_3.jpg (350x186, 20K)

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Thats where they put the botnet chips.

It's a chip covered in resin. Its the cheapass way to connrct and secure some integrated circuit to a pcb.

systemd

As opposed to solder?

It doesnt connect or secure anything. It just makes sure it stays put and is another barrier for people to analyse PCBs. Chances are the chip underneath has no markings either.

how does that prevent it? cant you just use a knife to take it off and then see what is under it

Yes, you could. But you might damage the chip.

m.youtube.com/watch?v=hQ5hXEK35WI
Maybe thatll help. As he says though, he destroyed the connections of the chip to the board taking the resin off, but its a chip underneath without the packaging you normally see a chip looking like (pic related)

Attached: F0406580-01.jpg (444x358, 14K)

Not all chips are like that. The ones without the normal packaging also use the resin for heat dissipation.

Most chips have normal packaging and might be covered by resin.