# Art and Wires

Posted on August 17, 2017

I’m going to take this old assemblage piece and put dual cameras in side – looking out through the eyes. Then I will take two Nema-17 Stepper Motors and a proximity detector and have the head tilt and pan in an effort to follow someone as they walk by.

I will also add something that makes a shrieking sound or a growl that grows in octave when someone gets near – like a dog growls and then howls. Maybe put a red led in the nose so you know he’s “locked onto you” . . .

# Measuring The u.RAT With an Oscilloscope

Posted on August 14, 2017

This is a nice little tutorial on how to use a signal generator and oscilloscope to measure the resonance of a tank circuit. Here is the video:

https://www.youtube.com/watch?v=G_RCyDdt2rM

He doesn’t show a frequency counter, but my Rig Experts AA-30 will act as a frequency counter. Here is a great video on what I might try with the u.RAT:

# Siglent SDG800 Function Generator

Posted on August 13, 2017

I’ve been researching test gear, and it is actually more for my education than anything.

For pure digital circuits, the Salaea Logic Analyzer is a good choice, and while I understand it can handle some analog signals, this is where a function generator and oscilloscope comes in.

At Circuitlab.com, I can draw a schematic diagram and simulate what it would look like in an oscilloscope:

Then I can build the circuit on a breadboard and measure it with my test gear.

Between this simulation and the real test gear, plus my favorite new electronics book:

I will be learning so much and haven’t been this excited about the ham radio hobby pretty much ever. I always wanted to really understand electronics – and in a very hands on “visual” way. Today’s technology is where I have wanted it to be for a long time. We live in an amazingly great time, technically speaking, wish I could say that politically . . . alas ….

So, with this gear, plus my Fluke DMM and Rig Expert AA-30, I set to test, explore, and learn about electronics in a way I couldn’t before.

# The Mandelbrot Set and Art Chaos

Posted on August 11, 2017

I just Googled Mandelbrot Set Art and as I had expected, found an amazing psychedelic world way better than silly tie dyed. . .

I am going to play with variations on the Mandelbrot Set equation, just to see how it renders as art work. You might know that I absolutely love “The Monochrome Set”:

So, my “inside joke” is that there is a New Wave band called “The Mandelbrot Set”.

Also – I now have a logic analyzer and a function generator to go along with my Oscilloscope. You know that I have been fascinated with reducing noise on 160M, and well, The Mandelbrot Set came about due to noise on a telephone line disrupting data transmission. 36 Years into my career, and Electronics, Computing and Art converge!

# Mandelbrot Set

Posted on August 10, 2017

IBM had a problem – they had noise on telephone lines which caused data errors way back in the day. They hired some very interesting people to solve the problem, and this video is quite fascinating – and really fun:

Just for fun, I found and ran a simple Python program that produces a Mandelbrot Set (a Fractal):

from pylab import * from numpy import NaN def m(a): z = 0 for n in range(1, 100): z = z**2 + a if abs(z) > 2: return n return NaN X = arange(-2, .5, .002) Y = arange(-1, 1, .002) Z = zeros((len(Y), len(X))) for iy, y in enumerate(Y): print (iy, "of", len(Y)) for ix, x in enumerate(X): Z[iy,ix] = m(x + 1j * y) imshow(Z, cmap = plt.cm.prism, interpolation = 'none', extent = (X.min(), X.max(), Y.min(), Y.max())) xlabel("Re(c)") ylabel("Im(c)") savefig("mandelbrot_python.svg") show()

# First Stop on the u.RAT World Tour: EBARC in El Sobrante

Posted on August 9, 2017