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December 4, 2005
things progressing

The new project (REAPER) is coming along nicely, getting very useful. Hopefully something fairly complete will be ready before Christmas, that's my goal at least. Christmas presents for all. It seems the fall is a productive time for me, often. Though I think I need to take a few days off of it, having spent about 2 weeks of solid work, well, has taken its toll.

Flew a new collective pitch R/C heli for the first time today, woot. It's really amazing how the technology has come along since I was a teenager. Also, Brennan got me RealFlight G3 for an early christmas present, and it's pretty awesome (aside from the complaints I do have, it's a tremendous amount of fun).

Brennan and Biderman and I had a nice jam today. It's so much fun, especially when we are able to pay attention to what everybody else is doing and adapt and coordinate stuff. Coffee seems to help a ton, too. In general, finding myself more able to play lots of different things is very satisfying and fun..

Posted by Raj on Mon 05 Dec 2005 at 16:09 from 67.167.141.x
Yay you replaced yum with woot :) Keep up the good work.

Posted by RajSucks Donkey Cocks on Mon 05 Dec 2005 at 22:26 from 63.247.135.x
Hey asshat, any constructive criticism?
How about comments that are on-topic.
Can you code?
Do you know your ass from your elbow?
Sorry for perpetuating the comment spam.

Sorry for the preamble. Been on my mind.
As for my salient input, I'd like to comment on the G3 system.
I too love it from what I've seen of it :)
It's alot cheaper a proposition than crashing your newly put together helis.
Hope to enjoy that soon, but need to gather up a little more fsck money before it's justified.

Posted by Raj on Tue 06 Dec 2005 at 07:25 from 67.167.141.x
Here is some constructive cristicism:

If you ever have a need to build more filters, instead of looking at a filters curve in the time domain, convert everything to the frequency domain (Fourier Transform) and you will the low pass filter is just a box about the orgin. This should be a lot easier for you and you can know exactly what values to use for the caps or resistors. You can use MATLAB also, it will graph everything nicely for you :)

Posted by Raj on Tue 06 Dec 2005 at 07:26 from 67.167.141.x

*you will notice the low pass filter

Posted by Justin on Tue 06 Dec 2005 at 12:00 from 64.81.54.x
yes, we know such things, take a look at the convolution based effects in Jesusonic.. but there are downsides to FFT based transforms, like latency.

Anyway, how does that translate into capacitor and resistor values? You get to use the normal equations for that, anyhow.

Posted by Raj on Tue 06 Dec 2005 at 12:29 from 67.167.141.x
Well the only reason I mentioned it is because if you plot it in the frequency domain you can better see where the noise is at and design your filter accordingly.

It translates to values from Wc (passband) being 1/rc. So if you find where your noise occurs, which is easy to do in the frequency domain, you can just select R and C to create the right sized band.

Sorry if I sound general, I don't mean to make any assumptions about what you already know.

Posted by Justin on Tue 06 Dec 2005 at 12:31 from 64.81.54.x
of course, when it's a motor spinning that is causing noise, you can also just guess at the RPM and number of brushes... ha ha

Posted by Raj on Tue 06 Dec 2005 at 13:06 from 67.167.141.x
Yeah that is the clever way to get a decent approximation.. /me has endured too much school ;)

Posted by Alex P. on Wed 07 Dec 2005 at 01:13 from 169.229.101.x
speaking of coffee,

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