CPC B26B 21/46 (2013.01) [B26B 21/16 (2013.01); B26B 21/222 (2013.01); B26B 21/4056 (2013.01)] | 20 Claims |
1. A consumer appliance comprising:
a body;
a cartridge removably mounted to the body, the cartridge having a surface with a first colored region and a second colored region;
a control circuit positioned within the body;
a first emitter that projects a first light at the first colored region and a second light at the second colored region;
a first light sensor mounted to the body that sends a first signal to the control circuit based on a color of light reflected from the first colored region; and
a second light sensor mounted to the body that sends a second signal to the control circuit based on a color of the light reflected from the second colored region.
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