Vago e solitario

Makerspace / Education / DIY

by Vago

Links first, as usual.

Starting points:

Buck Institute for education

Read “Where to find making activities for your classroom” for suggestions and ideas for class.

One of the things that struck me in discussions with other engineering professors around the country was how many students had little experience in actually building things.  Making is about realizing that you can be a creator instead of just a consumer. At its best, making allows kids to follow their own interests and passions and create something that is uniquely theirs, while applying the knowledge that they are gathering in all aspects of their life.

References to start a makerspace + Makerspace play book school edition

Resources in Atlanta:
– Invention studio at Tech, (second floor of the MRDC)
Monday–Thursday 10A–7P
Friday 10A–5P
Freeside Atlanta, 675 Metropolitan Parkway Suite 6066

Nearby resources

Resources for makers


Work in progress to master RF!

by Vago

Impressive story.  I wish I was a good RF engineer!

I now live in Tampa, Florida. I am semi retired and sometimes work for myself. As much as I enjoyed being an RF Engineer, the time and money was not worth it. When I was made Senior RF Engineer at Bosch Security Systems in Rochester NY. , I looked over their receivers. The first thing I noticed is they were populating the circuit boards with a transmitter section that they never implemented into their product line. Each transmitter consisted of about $7 dollars of parts. I noticed the error, cut out the transmitter part, redesigned the receiver for frequency interference compliance, and saved the company $7 per unit. That year we produced over 3 million units. So I saved the company about $21 million dollars.


A couple of months later, I had designed a glass break transmitter for the company and it was written up in a magazine, and the marketing and everyone loved it. […]
When I went back to the room, they saw me coming and one of the marketing bosses shut the door before I could approach the room. That is when I realized that marketing was king, and I was just an engineer. […] I don’t mean to pat my own back, but what I saw from most of these companies was a trial and error approach to design. I decided that I would either go back and get a higher degree or change fields. So I changed fields, became a commodity broker and made almost 10 times my engineering salary the first year. I now own 4 companies.

Protetto: Rectennas

by Vago

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Wikimedia commons

by Vago

My first entry to the wikimedia commons: a 3 port clockwise circulator symbol drawn in Inkscape.

Some notes about circulators here.


World Telegraphy

by Vago

“It involves the employment of a number of plants, all of which are capable of transmitting individualized signals to the uttermost confines of the earth.  Each of them will be preferably located near some important center of civilization and the news it receives through any channel will be flashed to all points of the globe.  A cheap and simple device, which might be carried in one’s pocket, may then be set up somewhere on sea or land, and it will record the world’s news or such special messages as may be intended for it.  Thus the entire earth will be converted into a huge brain, as it were, capable of response in every one of its parts. ”

The transmission of electrical energy without wires, Nikola Tesla.
Electrical World and Engineering. March 5th, 1904

How we are connected: Electromagnetism through men’s history

by Vago




Some notes of a tentative lecture about the history of electromagnetism

photo 1


photo 2


Research Journal. Entry #1

by Vago

Capacitors used for coupling and DC blocking applications:
when designing a circuit at RF with capacitors for coupling or DC block, make sure the frequency used is equal or below the  capacitor’s F_sr (Series Resonant Frequency).


– implemented as series elements

– couple RF energy from one part to another of the circuit

– block DC

– proper selection of coupling capacitors insures the maximum transfer of RF energy

– a coupling capacitor can be represented as a set of: coupling capacitor C_0, Equivalent Series Resistance (ESR) R_s, equivalent series inductance (ESL) L_s and parasitic parallel capacitance C_p associated with the parallel resonant frequency (F_pr)

– series resonant frequency F_sr = 1/[s*pi*sqrt(L_sC_0)]

– at F_sr, the capacitor’s net reactance is zero and the impedance is equal to ESR. At this frequency the capacitor will provide the lowest impedance path required for optimal coupling.  Note: a capacitor’s F_sr can usually be exceeded without problem as long as the net impedance remains low.


Electro music production software

by Vago

DAW = Digital Audio Workstations

– ** FL studio 11 (has its own plugins –> instruments) —> more about electro music
– Ableton (more serious then FL studio 11)
– Logic (advanced version of garage band) —> more flexible that the previous two
– Reason, not possible to add third party plug ins
** good to start with

Patterns and Tracks on Fl studio;
kick and snare and piano roll. sound design vs composition
sawer —-> a syntetizer to modify waveforms

1.envelope: is the shape of the overall signal. There are 4 parameters: attack is the time the sound needs to reach its peack, decay, sustain, release is the time the sound needs to decay when the key is released.
– level: keep it to 0 dB
– panning: decides which speaker to play
– transpose: tranlate the notes
– fine: changes the pitch between notes
2. filters: cutoff frequency; resonance makes loud the sound at the cutoff frequency before filtering the rest; ecc…
– filter envelope, same concept as above.
3. LFO: Low Frequcny Oscillator. “it gives shape to the sound”

House: tempo, 125 – 135 (128)
Trans: tempo, 140 – 150
DubStep: tempo, 70

Siete mai stati al Sud?

by Vago

Ora tocca a voi viaggiare 🙂