Circuit diagram of a 555 timer IC.
A punched card.
Used for computer data entry in the 1970s.
An old security device used in shops.
The cover has been removed.
2KB EPROM.
The filament from a fluorescent tube.
Note that the filament is coiled coil.
A RFID tag used for tracking goods.
A security tag from a DVD.
Note the coil and capacitor form a tuned circuit.
The spacing of the capacitor leads is 0.1".
A Digital Light processor.
Each mirror is 16µm square and is 1µm from its neighbour.
Electric shock (www.twothirtyvolts.org.uk).
Magnetron from a microwave cooker.
Replica of the first magnetron.
Birmingham University.
The erase head from a reel to reel tape recorder.
Note the tiny gap between the two poles of the electromagnet.
Tesla coil sparks.