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analogcomputation:01_chuascircuit [2020/05/20 22:22]
admin [Analog Computation #01 - Chua's Circuit] 		analogcomputation:01_chuascircuit [2020/05/22 12:05] (current)
admin [License]
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 The circuit basically just needs 5 parts:\\ The circuit basically just needs 5 parts:\\
-{{:analogcomputer:1280px-chua_s_circuit_with_chua_diode.svg.png?400|}}\\ 
- 
-//by [[https://commons.wikimedia.org/w/index.php?title=User:Chetvorno&action=edit&redlink=1|Chetvorno]]// 
- 
-<html> 
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-By <a href="//commons.wikimedia.org/w/index.php?title=User:Chetvorno&amp;action=edit&amp;redlink=1" class="new" title="User:Chetvorno (page does not exist)">Chetvorno</a> - <span class="int-own-work" lang="en">Own work</span>, <a href="http://creativecommons.org/publicdomain/zero/1.0/deed.en" title="Creative Commons Zero, Public Domain Dedication">CC0</a>, <a href="https://commons.wikimedia.org/w/index.php?curid=31049859">Link</a></p> 
-</html> 
  
 +[[https://en.wikipedia.org/wiki/Chua%27s_circuit#/media/File:Chua's_circuit_with_Chua_diode.svg|{{:analogcomputer:1280px-chua_s_circuit_with_chua_diode.svg.png?400|}}]]
 +//(graphic by [[https://commons.wikimedia.org/w/index.php?title=User:Chetvorno&action=edit&redlink=1|Chetvorno]], [[https://creativecommons.org/publicdomain/zero/1.0/deed.en|CC0]])//
  
 C1 = 10 nF\\ C1 = 10 nF\\
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 One can build a Chua's Circuit with the analog computer [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:analog_computer_main|Confetti]]. Two modules are needed: the Chua's Diode and a Gyrator. A Gyrator is more handy than an inductor so one can use it instead.\\ One can build a Chua's Circuit with the analog computer [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:analog_computer_main|Confetti]]. Two modules are needed: the Chua's Diode and a Gyrator. A Gyrator is more handy than an inductor so one can use it instead.\\
  
-[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti116_chua_diode|{{:analogcomputation:confetti116_chua_s_diode_ii_01.jpg?300|}}]]\\+=== Chua's Diode === 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti116_chua_diode|{{:analogcomputation:confetti116_chua_s_diode_ii_01.jpg?300|}}]]
 [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti116_chua_diode|Chua's Diode]]\\ [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti116_chua_diode|Chua's Diode]]\\
- 
-[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti101_gyrator|{{:analogcomputation:confetti101_gyrator_03_15mh.jpg?300|}}]]\\ 
-[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti101_gyrator|Confetti 101 Gyrator]]\\ 
  
 There are different ways to implenent a Chu's Diode, an alternative Chua's Diode one finds here:\\ There are different ways to implenent a Chu's Diode, an alternative Chua's Diode one finds here:\\
 [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti102_chua_diode#confetti102_chua_diode|Confetti 102 Chua's Diode (with real diodes)]]\\ [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti102_chua_diode#confetti102_chua_diode|Confetti 102 Chua's Diode (with real diodes)]]\\
  
-To build a Chua's Circuit out of these board one needs additionally a breadboard, some jumper wires, two 9V batteries and these parts:\\+=== Gyrator === 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti101_gyrator|{{:analogcomputation:confetti101_gyrator_03_15mh.jpg?300|}}]] 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti101_gyrator|Confetti 101 Gyrator]]\\ 
 + 
 +=== Power Supply === 
 +One needs a power supply, too. To get the positive and the negative 9V to power the Confetti boards the easiest way is to use two 9V batteries.\\ 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:9v_battery_supply|{{:analogcomputation:confett_9v_power_8583.jpg?300|}}]] 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:9v_battery_supply|9V Battery Supply]] 
 + 
 +=== ... and some Caps and a Poti === 
 + 
 +To build a Chua's Circuit out of these board one needs additionally a breadboard or a [[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti302_breadboard|Confetti302 Breadboard]], some jumper wires, and these parts:\\
   * **Capacitors:**   * **Capacitors:**
   * 1x 100 nF   * 1x 100 nF
   * 1x 10 nF   * 1x 10 nF
-  * **Mechanical:** 
-  * 2x 9V battery clip 
-  * 2x 3 pin strip (for the battery connector) 
   * **Potentiometers:**   * **Potentiometers:**
   * 1x 5 kOhm   * 1x 5 kOhm
  
-And for attaching the circuit to an audio mixer one should use an additional high Ohm resistor. Something like 500 KOhm should do.+=== Audio Out === 
 + 
 +For attaching the circuit to an audio mixer one should use an additional high Ohm resistor. Something like 500 KOhm should do.\\ 
 +A much better way would be to use a buffered audio output.\\ 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti103_buffered_output|{{:analogcomputation:confetti103_buffered_output_10.jpg?300|}}]] 
 +[[https://paperpcb.dernulleffekt.de/doku.php?id=analog_computer:confetti103_buffered_output|Confetti103 Buffered Output]] 
 + 
 +=== Setup === 
 +A final setup could look like that:\\ 
 +{{:analogcomputation:chua_s_circuit_setup_01.jpg|}}
  
 ---- ----
 ==== Schematic ==== ==== Schematic ====
  
-{{:analogcomputation:chua_s_circuit_01.jpg?400|}}\\+{{:analogcomputation:chua_s_circuit_02.jpg?400|}}\\
  
 ---- ----
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 Additionally one needs some double sided tape to stick the paper printout on the [[https://en.wikipedia.org/wiki/Veroboard|Veroboaord]] and some copper wire for the PCB bridges and some breadboard jumper wires. Additionally one needs some double sided tape to stick the paper printout on the [[https://en.wikipedia.org/wiki/Veroboard|Veroboaord]] and some copper wire for the PCB bridges and some breadboard jumper wires.
 +
 +It is also possible to replace the [[http://www.ti.com/lit/ds/slos080n/slos080n.pdf?&ts=1590083569530|TL072]] operational amplifier with an [[http://www.ti.com/lit/ds/symlink/lm358-n.pdf?&ts=1590063244194|LM358]], both work the same.
  
 ---- ----
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 One can connect an audio mixer (with a 500 kOhm resister) and oscilloscope probes to three different points. X and Y are at the connection of the capasitor and the poti. The third one (Z) is on the gyrator board.\\ One can connect an audio mixer (with a 500 kOhm resister) and oscilloscope probes to three different points. X and Y are at the connection of the capasitor and the poti. The third one (Z) is on the gyrator board.\\
 +
 +{{:analogcomputation:chua_s_circuit_02_xyz.jpg?400|}}\\
  
 An oscilloscope in X-Y mode should look like that:\\ An oscilloscope in X-Y mode should look like that:\\
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 ==== License ==== ==== License ====
  
-The tutorial and all boards are made by **Wolfgang Spahn** 2016-20.\\+Except where otherwise noted, the tutorial and all boards are made by **Wolfgang Spahn** 2016-20.\\
 They are licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]]. They are licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]].