Category Archives: Truth
Redirect – www.AngryInventor.com
I’m called a mad scientist often… I say I’m an 
5 ways to get the most out of the books you read
Music Note Frequency Calculator With Cent Adjustment
A colleague posed a very interesting question:
“I am looking for any music/music math wizard help me figure this out. If I am moving the pitch of a song up by 50 cents (a quarter step?) What frequency is A instead of 440?”
Sounded like the kind of math challenge I like:
The answer is 452.893Hz
To test and confirm that it’s calculating properly, this is up 100 cents making G# 440
This is down 100 cents making A# 440
Here is a link to the excel file
19.22″ EXACTLY….
Dave Adams did my a solid today. I needed some support cut to exactly 1.6 *12 plus 0.02 worth of “wiggle room” spaced over 12 modules. He has the tools and knows them too well! Thanks again Dave! 
Sound guy xmas Idea – CN37 Light guided Connector Assembly
Got a Call from Christopher today. “I do a lot of EDACs” I said. He said “what you really want is the CB37 Light Director Board“
And he was right.
had to throw out some art this week
The words of sound
Bob Katz book “Mastering Audio the art & the science” 2nd ed.
VW golf – Will it fit?? 14 power amps…
BARELY!!!
This was a hairy transport… I feared getting into an accident with this load. I most certainly would have been taken out. Also, the weight of them sure dropped the back of the car 3″! Thanks again D, I don’t know what I’ve gotten myself into!
Speaker cut in half
Reply
Passive HP/LP Filter calculator – More fun with Excel
To better understand the behavior of a Passive Resistor Inductor / Resistor Capacitor I built another excel calculator….
ly
Transistor Man
a whole semester summed up in one drawing
From the Art of Electronics second edition – Paul Horowitz and winfield Hill
my sister sent me ths
RLC calculator for components in series
I’ve been calculating a lot of components in series lately for an ECR255 class. I’ve also had to graph them on impedance diagrams and a power triangle.
In an effort to better understand the math I made a calculator for myself. Here is it for you to use and enjoy. If you see any problems please let me know. It was designed in excel 2011 for mac… there WILL be compatibility issues and I hope they’re minor.
How it works:
You can fill int the info you have in the orange boxes. Once the boxes are filled in the calculator should fill in the rest.
If you need to modify anything else, it’s all dependant on the orange boxes. I suggest a goal seek by modifying and orange cell.
schadow switch mounting information
In the 70’s and into the 90’s WBS used a Schadow switch in almost every product they built. Different buttons required different offsets so “GOLDEN RULES” of design were made up so each engineer was on the same page. I found two of those pages the other day and was fascinated. These drawings are both done by hand and are admirable.
Turn table math
I thought this was very interesting
As seen on a transformer today…
Well there’s your problem
Ever hear someone say “there’s something funny going on with that power?”
I think electricians are sometime intimidated when they see Orange receptacles. I’ve become sceptical of Orange receptacles without a label on them. Today I had just reason to explore a problem I had…
Audiophiles are…
“Audiophiles are the homeopathic healers of the electrical engineering world”
if your curious about the patents
Wednesday night TV
Check out Jörg Wuttke, Understanding Microphones
Jörg Wuttke was born in Berlin in 1942. He studied electronics and telecommunications at Karlsruhe University, specializing in acoustics, and was teaching assistant to professor Günther Kurtze, the inventor of the shotgun microphone. He joined Schoeps GmbH as a research engineer in 1970, became its chief engineer in 1972, and is now its technical director.
Mr. Wuttke has been an active member of the Audio Engineering Society for many years, including publishing in the AES Journal and presenting papers and chairing workshops at conventions. In1993 he was awarded an AES Fellowship. Since 1972, he has been a member of the DIN standards committee on microphones and headphones. He maintains an avid interest in listening to music and recording live concerts.