{"id":1287,"date":"2018-05-28T00:08:33","date_gmt":"2018-05-27T23:08:33","guid":{"rendered":"https:\/\/ofalcao.pt\/blog\/?p=1287"},"modified":"2018-05-28T00:21:46","modified_gmt":"2018-05-27T23:21:46","slug":"the-stage","status":"publish","type":"post","link":"https:\/\/ofalcao.pt\/blog\/2018\/the-stage","title":{"rendered":"The stage"},"content":{"rendered":"
This post is part 2 of 5 of \u00a0LEGO Rock Concert<\/a><\/div>

The main part of the Rock Concert is the stage so it will set the scale of all the diorama.<\/p>\n

In the first version, the stage had a few internal gears that allow my kids to move the minifigures of 4 of the 5 elements of the band with a stick at the backstage. I had the idea to animate all 5 but never got a solid way to move the arms of the drum player (“Kalu”) so I left him static and put “Z\u00e9 Pedro” walking along the stage with his guitar (he is\/<\/del>was a bit wild at stage, once he even broke a leg jumping to a speaker) and the remain three just turning around on their places (“Tim” the bass player and main vocals, “Jo\u00e3o Cabeleira” the human statue that plays guitar and “Gui” with his saxophone).<\/p>\n

A second version had 4 LEGO mini-motors instead of sticks and a LEGO MINDSTORMS EV3 controlling the motors… through a USB 8-relay board! It was one of my first experiments with ev3dev and I had no idea how to control those old motors so I used the relay board I had bought for the Raspberry Pi… it was also the first time I invoked bash scripts from python:<\/p>\n