On Wed, 3 Feb 2010 10:35:40 -0000, "Vass"
wrote:



"Chris J Dixon" wrote in message
.. .
Vass wrote:

I've got a kids kit of a walking giraffe than I have salvaged the motor
and
gearbox from.
It runs on a single AAA battery.
but even with the gearbox, the end spindle is turning way too fast for the
job I have for the unit.
Is there a resistor or some other thingymebob that I can put in line from
the battery to the motor
that will half (approx) its speed?

To a first approximation, DC motor speed varies with voltage, so
if you connect a series resistor of roughly the same resistance
as the motor itself, this may do what you want. A down side is
that the torque will also reduce, and you may not have enough
power for your needs.


hmm torque is an issue, its going to swing a 4 foot length of thin timber
(balanced with axis in the centre obviously)

The mind boggles!

--
Frank Erskine