The Brics~2~Bots Engineers have been busy learning about Double-Leaf Bascule (Draw) Bridges. Probably the most famous one is the London Bridge in England.
A little history about the rhyme and the London bridge; the rhyme was from a song in a play (1659), then later published as an English nursery rhyme about 1744. The 1st. bridge across the Thames River was around AD 55. In 1176, after a number of wooden bridges were destroyed by fire, a permanent stone crossing was built. It took 33 years to build. It was a drawbridge for the passage of tall ships up-river, and defensive gatehouses at both ends. In addition to shops and houses there were multi-seated public latrines; guess where the poop went! By the end of the 18th century, the old London Bridge, now over 600 years old, needed to be replaced. The New London Bridge also known as the Rennie's bridge was opened in 1831. However, by 1896 they discovered the bridge was slowly sinking. Finally, in 1967-73 a Modern London Bridge was built. So what happened to the New London Bridge of 1831? Where is it now? We’ll let you find out; you will be surprised!
So here is our LEGO(R) Double-Leaf Bascule (Draw) Bridge..
As you can see my students, Olivia and Jonas, have an interesting imagination.
The bridge was “robotized” with an EV3 Controller brick, three EV3 Touch Sensors (to control the toll barriers and the draw bridge), two EV3 Medium Motors, and two NXT Motors (simply because they fit better).