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)

OK I'll bite. What model are you making this time :-)
It can't be anything to do with Halloween, can it?

Dave