Tuesday, 10 April 2018

Caesarea - Israel

Beautiful and historic town ... on Israel's Mediterranean coast.








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tHE old Roman ampitheatre

























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Marcus Aurelius - Stoic ethics & wisdom

 If there is a single take away message it's:

STOP WORRYING.


Worrying won't fix things. Just get on with your life.
Be rational, and with cool head solve the problem, or at least do what you can to limit the negatives.
 
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Marcus Aurelius is a proponent of Stoic philosophy
He was a Roman Emperor who concerned himself about how to live a virtuous life. (The Philosopher King of Plato).
Stoicism is a type of Hellenistic philosophy first taught by Zeno of Citium in Athens in the early 3rd century BC.
 
Stocism had 3 branches : Logic, Physics & Ethics
The Stoics also believed there were four virtues:
Wisdom
Courage
Temperance
Justice

Of the Four Stoic Virtues, Marcus Aurelius said justice was the most important. 

To him, it was “the source of all the other virtues.”

Marcus left us a guide in how to live through his mental journal, Meditations.
He never intended it to be published.
It's a very personal self-help book with lots of practical advice. There is little in the way of philosophical theory or argument. He doesn't discus logic or physics very much. Its mainly all ethics. So many academics argue that its not a serious Stoic work. I think these criticisms are unfair.
 I enjoy reading his many thoughts and take great comfort from his words.
Ethics are arguably more of use to the casual reader today, than logic or physics
 These are some important points I've taken from the notes
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01. Life is a loop ... history repeats over and over.
      This refers to worrying. 
      “Remember .... that everything has always 
       been  the same, and keeps recurring,
       and it makes no difference whether 
       you see the same things recur in a 
       hundred years or two hundred, 
      or in an infinite period." 

      and this quote:
      Consider for example, the times of 
      Vespasian. Thou wilt see all these things,
      people marrying, bringing up 
      children, sick, dying, warring, feasting,
      trafficking, cultivating 
      the ground, flattering, obstinately arrogant, 
      suspecting,  plotting, wishing for some
      to die,
      grumbling about the present,
      loving, heaping up treasure, desiring consulship, 
      kingly power. 

      Well, then, that life of these people no longer exists at all. 

       Thus excessive worrying  is pointless as what you are worrying about has already happened, 
       many times before ...just in a different form and to possibly many people like you.

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02. Ignore the noise.
 
“Men seek retreats for themselves - in 
 the country, by the sea, in the hills -
 and you yourself are particularly prone
 to this yearning. 
 But all this is quite unphilosophic, 
 when it is open to you, at any time 
 you want, to retreat into yourself. 
 No retreat offers someone more 
 quiet and relaxation than 
 that into his own mind, especially 
 if he can dip into thoughts there
 which put him at immediate and 
 
      complete ease: 
      and by ease I simply mean a well-ordered life. 
      So constantly give yourself this retreat, and renew yourself. 
      The doctrines you will visit there should be few and fundamental, 
      sufficient at one meeting to wash away all your pain and send you back 
      free of resentment at what you must rejoin.” 
 
      Stop worrying about what other people think (about you). This will only add to your anxiety.
      People pleasing will sabotage your confidence. I see this on social media all the time. 
      We can never please 100% of people. There will always be someone who is jealous, 
      or hates you.
      We can't control the opinions of others. So stop trying to impress everyone. 
      Be Yourself always.
 
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03. Time is a precious commodity
       "Life is short ..... that's all there is to say"' 
        ..... get what you can from the present ... 
       thoughtfully, ... justly." 
       "Understand that your time has a limit set to it. 
       Use it, then to advance your enlightenment; 
       or it will be gone, and never in your power again.”
       We don't know how long we each have on this
       planet. 
       Don't waste it.
 
 
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04. Do the right thing
   
      “Just (that you) do the right thing. 
       The rest doesn’t matter.” 
      and
 
     "Waste no more time arguing what a good
       man should be. Be one.”
 
 
 
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05. Don't let things get in the way.
      “The impediment to action 
       advances action. 
      What stands in the way
       becomes the way.”
 
       We all face obstacles in life. 
       Don't run away. Instead face up 
       to the challenges that life throws
       in your way.
 
       This is how we discover
       who we truly are.
    
 
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06. Practice mindfulness 
       " remind yourself that past and future
         have no power over you. 
         Only the present – and even that can 
         be minimized".
 
        Again this is a reminder to worry less.
        Concentrate on the present & make the
        most of it. Meditate, focus on whats 
        around you.
        Rather than just worry, focus on the problem
        at hand. Be aware, mindful of its causes
        and try to sort it out.
       




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07. Serve others.
 

      “At day’s first light have in readiness, against
      disinclination to leave your bed, the thought that
      ‘I am rising for the work of man.’ 
 
      and
      “A man’s true delight is to do the things he was 
       made for.”
 
     We live to help one another and the more we help 
     others, the more we gain. It is a win-win.
 
 


+ Philosophy index  
 
 

Monday, 9 April 2018

NLC Triad - Build notes - Triple Envelope Generator

Looks like a nice compact EG module. It's in the Eurorack format.
It's a easy build too.

"These are AR or AD generators that will fire on a trigger or a gate, giving envelopes up to approx 25 seconds. A single gate to input 1 will fire all 3 envelopes, when nothing is plugged into inputs 2 & 3."

There are three envelopes in the one package.

Andrew's Blog notes are here:
http://nonlinearcircuits.blogspot.com.au/2015/11/triad-triple-envelope-generator.html

His Build guide is here:
http://www.sdiy.org/pinky/data/TRIAD%20build%20guide.pdf

If you are using a gate to trigger the envelope, once the attack stage is over the envelope will stay high until the gate finishes and then it begins the release stage.


When building remember that the LEDs are an integral part of the circuit.
Andrew recommends I use ultra-or super-bright LEDs. So depending upon the V ON of my LEDs,
I may need to have to adjust the  LED resistors (1k or 4k7 resistors) to get envelopes hitting the desired voltage. The target is to get 5-7V envelopes.



Each module used three 555 timer chips.



Andrew recommends using 22μF capacitors to get envelopes lasting approx. 25 seconds.
I'll stick with this on this build. I guess you can use larger caps if you want longer envelopes or smaller caps for shorter ones. I have two more triad PCBs to build and might experiment with cap sizes (even on the same board) on these later builds.

I usually put the ICs on first, then the rest of the passive SMD.
 pOTS & jacks next.
LEDs
Don't forget the ground leads on the jacks.
Nice !

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Build 2
The LEDs make a big difference to the final voltages
I built a second Triad using green LEDS
The voltage ranges were between 5V and 8V

 




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You can find more NLC builds here.
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