Computers should sound like they're doing something
November 5, 2011 8:45 AM Subscribe
posted by mccarty.tim (36 comments total)
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are simple electrical components that turn on an electromagnet with a small current to trigger a switch for a circuit usually capable of handling a larger current. For example, a relay can be used by a 5 volt DC microcontroller to turn on a 120 volt AC heating element in a rice cooker.
Since relays can be used for logic
, they can also be the primary components of gloriously clicky computers
for details on the last one).
Of note is that Zusie has an online simulator
They're Turing-complete finite machines, so they can effectively do anything a more modern transistor based computer can, just much slower and with much less memory.