December 2, 2014

100 Amp Double Pole Breaker Teardown
Teardown

  I had one of these Siemens 100 Amp Double Pole Breakers go bad I was curious what went wrong. The failure mode was one phase was good under a load of 20 or 30 amps but the second phase dropped to around 60 or 70 VAC under load. You can see in the video that the copper braided cable had a weld that failed. I make some wrong assumptions

Talking Autonomous Robot
Cool Gadgets

    DonEduardo built a Talking Autonomous Robot that has some personality. It wonders around looking around with his ultrasonic sensors, it can look to see if it is enclosed where it can take a nap. Every now and then he speaks. Very cute robot! The brains of the robot is Parallax based, the locomotion comes from a Roomba.