#robotics Logs

Aug 28 2015

08:13 MisterX look at 3:55
08:13 MisterX https://www.youtube.com/watch?v=LwEBB6v559I
08:14 MisterX 5V 1A to run raspberry?
08:22 SpeedEvil You connect only the grounds
08:22 SpeedEvil then the power the servo uses is irrelevant
08:39 rue_school hah, it does a crap job of operating a servo
08:39 rue_school better off using an AVR
08:44 SpeedEvil You can do PWM over DMA
08:44 SpeedEvil which is just fine
09:00 rue_school ugh, its rining and I have no jacket
15:48 MisterX the accelerometer in this IMU c an sense up and down movement, right?
15:48 MisterX https://www.sparkfun.com/products/10724
15:49 Snert_ it can sense acceleration in the vertical plane if it's mounted vertically.
15:52 Snert_ it's just an accelerometer. It has no concept of up or down.
15:53 MisterX depends how it's made xD
16:14 Snert_ I'm liking these 3.3v devices we're seeing now
16:32 Snert_ even "vertical" really has no meaning. People at the equator htink they look up but really they're looking sideways from the earth
16:43 robopal can you look down?
16:43 Snert_ no, it's not possible.
16:43 Snert_ we merely point our heads in the negative vertical plane.
16:43 robopal when you are looking at your feet, what direcion are you looking
16:44 Snert_ no...we point our heads in the negative X asix.
16:45 Snert_ positive X axis would be up, I think.
16:45 Snert_ locally speaking, of course.
16:45 robopal you mean Y axis?
16:45 Snert_ that's it.
16:47 Snert_ sheesh, even that might be relative, given different languages and notions of representation of the 3 axis.
16:49 robopal how did this conversation started?
16:56 Snert_ 12:25 (MisterX) the accelerometer in this IMU c an sense up and down movement, right?
16:56 Snert_ we're open to a better answer :)
16:57 Snert_ (Snert_) it can sense acceleration in the vertical plane if it's mounted vertically.
16:58 Snert_ so to be technically correct, would we speak in stellar co-ordinates relative to the sun?
16:59 Snert_ or the central plane of the milkyway?
17:00 Snert_ we think of down. But it's just the direction gravity is pulling us.