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Building a robot car for carrying objects up to 50# weight Answered

Working on a low profile robotic car that is semispherical that can carry up to 50 # load.(sack of rice or 5 gallon water). It will have sides that can open up like flower petals and the middle portion can telescopically lift up to 30 " or more.
This robot will follow me around and can be programmed to deliver things inside the house, or from garage to the house.

The mechanical portion I had already started working on but the I had no idea yet how to automate this creation.
Would like to solicit some advice from the group 


Look into scissor lifts. Don't know what your power requirements will be. Arduino with a motor shield should be able to control and animate your flower petals too. Good luck.

Thanks for the scissor lift comment. I was thinking of pneumatic or hydraulic cylinder but your idea make it more simple.