Build: Pull3y-Bot

PULL3Y-BOT makes chores fun! It is programmed to lift a bag up to 10 lbs, wait 20 seconds for loading/unloading, then lower itself back down. We designed a counter-balance mechanism to adjust for load weight - it is raised without weight and lowered with a load (see pictures). The weight of the EV3 programmable brick balances out the weight of the load, as well.