A dynamo is a type of electrical generator. On a bicycle it is in contact with the wheels, so that it spins when the bike is moving. That spinning is turned into electricity, which can be used to power bicycle lights.
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4 dynamos were installed on the Titanic.
Houston Dynamos ended in 1992.
Invicta Dynamos was created in 1997.
Dynamos F.C. was created in 1963.
Tralee Dynamos F.C. was created in 1961.
The plural form of the word "dynamo" is "dynamos."
London
Dynamos F.C. - South Africa - was created in 1997.
The Dynamos have won 2 MLS Cups (2006, 2007).
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Alternators produce AC, which is rectified by diodes if DC is needed. Dynamos produce DC by using a commutator.