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How can I make a motion activated motor that can pull a cable and pull up a 4lb object ?

How can I make a motion activated motor that can pull a cable and pull up a 4lb object  ?  I am wanting to make a toy for my cat. I want the sensor to keep the object up for extended time. Who can help me.

iceng4 years ago
I  can,  what can you do in electronics ?

A