Software Libre , Tango y Hacks Misceláneos

http://iwdrm.tumblr.com/page/38

Un tumblr con escenas y frases de clásicos del cine. Ni idea de cómo llegué allí pero me compró al instante.

“Did you ever think of me? … Only when I was sad.”Solyaris (1972)

“You mean more to me than any scientific truth.”Solyaris (1972)

“Sometimes reality is too complex for oral communication. But legend embodies it in a form which enables it to spread all over the world.”Alphaville, une étrange aventure de Lemmy Caution (1965)

“We can stop, get pancakes and then we’ll get laid, alright?” (Fargo)

“Why do you look so sad? Because you speak to me in words and I look at you with feelings.”(Pierrot le fou)

“Why do we ask so many questions? Two people shouldn’t know each other too well if they want to fall in love.”(L’eclisse)

Would you rather spend the weekend partying with amusing strangers or doing geeky stuff? Happy as never with my shiny new and photocopied books (Principles of Communications by Ziemer being the most notable and a bunch of theses) I chose the latter. Also I played with some brushless motors and field oriented control.

To make things worse (?) every single attendant to the party confirmed that my weekend was funnier than theirs.

The LB1946 is a very nice chopper driver, the only downside is that it has a serial interface. So, for a project I need to control some steppers. I have a box full of printer boards, picked this one from and old epson inkjet because it had the same chips and also looks like I can chop it in half with a hacksaw and use them as they are.

The logic and the original power supply were toast so I used another I had at hand. To make some tests I hacked the PowerSwitch circuit from Objective Development to send raw commands and spin the motor with an usb interface.

At the end it doesn't look quite like the original but it works. Still can't get more than 1000 steps per second but I think that's because of the supply. Now that I have the basic code working I'll have to make a parallel interface so I can use them with EMC.

Sourcecode / References:

• V-USB a software-only implementation of a low-speed USB device for Atmel’sAVR® microcontrollers
• lb1946_usb.tar.bz2 - Firmware and host software to control the lb1946.
• LB1946 datasheet (local mirror, may be outdated)

Pics:

- ...so before you said something about being a "tinkerer", please elaborate on that.
- well, I like to know how things work, their internals... what makes them tick
- ah, now I get it. You are another weirdo with a fetish on cuartz crystals, aren't you?

"Sos igualito a Johnny Depp!!"

me dijo y cayó redonda sobre la mesa.