On Feb 14, 12:04 pm, "HK" wrote:
Any suggestions on a fun followup project that will help both of us learn
more electricity concepts?

Put a speed controller on the motor. A simple rheostat (variable
resistor) demonstrates how motor speeds can be changed.

Get various resistors. Demonstrate how the different color bands
correspond to ohm numbers - and then measure them with the meter.
Radio Shack once sold little color wheels. Dial in the color and read
te number.

Reading the values and then measuring with the meter should teach
something about how the real world 'varies' from what is should be.

Meanwhile some numbers for that light bulb. A 12 volt light
operating at 6 volts will output about 1/10 the lumens and consume 33%
of watts as compared to 12 volt power consumption. Obviously the bulb
is less efficient at those lower voltages. At 6 volts, the bulb will
last about 8200 times longer.

A 12 volt bulb at 9 volts will output 40% the light at 12 volts and
consume about 60% of the wattage. Unlike Pop', numbers can be
provided with replies.