ChaoticCircuits - Revision history

Maxell at 16:09, 26 November 2012

2012-11-26T16:09:51Z

← Older revision		Revision as of 16:09, 26 November 2012
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	== Background reading ==		== Background reading ==
	* One of the simplest possible chaotic circuits : http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf		* One of the simplest possible chaotic circuits: http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf
	* This one seems particularly interesting - possibility o encrypt analog sygnal : http://www.fortunecity.com/emachines/e11/86/circsync.html		* This one seems particularly interesting - possibility o encrypt analog sygnal: http://www.fortunecity.com/emachines/e11/86/circsync.html
	* http://www.cornellcollege.edu/physics/courses/phy312/Student-Projects/Chaotic-circuits/Chaos.html		* http://www.cornellcollege.edu/physics/courses/phy312/Student-Projects/Chaotic-circuits/Chaos.html
	* Original paper: [~~httphttp~~://link.aps.org/doi/10.1103/PhysRevLett.47.1349 Period Doubling and Chaotic Behavior in a Driven Anharmonic Oscillator]		* Original paper: [http://link.aps.org/doi/10.1103/PhysRevLett.47.1349 Period Doubling and Chaotic Behavior in a Driven Anharmonic Oscillator]


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	Create the circuit that works at a lower frequency. Smith also describes a circuit that operates at 75 KHz instead of 2 MHz. Main bottle neck is the required large inductance		Create the circuit that works at a lower frequency. Smith also describes a circuit that operates at 75 KHz instead of 2 MHz. Main bottle neck is the required large inductance

	Goal is to :		Goal is to:
	* Be able to hear the chaos		* Be able to hear the chaos
	* Have the whole thing portable, without the need for an external oscilloscope and signal generator		* Have the whole thing portable, without the need for an external oscilloscope and signal generator
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	Todo:		Todo:
	* Calculate the inductance and capacitance required to achieve a resonant frequency in the audible range, preferably around 440 Hz. Conservative human hearing range is from 20 Hz to 15 kHz.		* Calculate the inductance and capacitance required to achieve a resonant frequency in the audible range, preferably around 440 Hz. Conservative human hearing range is from 20 Hz to 15 kHz.
	* Identify the operational limits of the [~~httphttp~~://code.google.com/p/arduinoscope/ arduinoscope] - max seems to be around 200 kHz, well above audible range		* Identify the operational limits of the [http://code.google.com/p/arduinoscope/ arduinoscope] - max seems to be around 200 kHz, well above audible range
	* Make sure that an arduino based scope can observe the signal.		* Make sure that an arduino based scope can observe the signal.
	* salvage/build/buy an appropriate spool		* salvage/build/buy an appropriate spool
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	== Version 1.0 ==		== Version 1.0 ==
	* Following : http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf		* Following: http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf
	* Working oscilloscope and signal generator present, capable of 2Mhz		* Working oscilloscope and signal generator present, capable of 2Mhz
	* Components according to the manual :		* Components according to the manual:
	** 200 ohm resistor		** 200 ohm resistor
	** inductor, 100 microHenry needed, available a PE-53653 , with 16.1�H		** inductor, 100 microHenry needed, available a PE-53653 , with 16.1�H
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	* As built, the circuit does not display any chaotic behavior as we change the amplitude, The inductor is almost 5 times to weak.		* As built, the circuit does not display any chaotic behavior as we change the amplitude, The inductor is almost 5 times to weak.
	* I have several spools, adding an extra spool in series, bringing the inductance up to 32 �H does not help.		* I have several spools, adding an extra spool in series, bringing the inductance up to 32 �H does not help.
	* When adding random spools, it is good to measure its inductance. Here is a way to do it : http://www.daycounter.com/Articles/How-To-Measure-Inductance.phtml		* When adding random spools, it is good to measure its inductance. Here is a way to do it: http://www.daycounter.com/Articles/How-To-Measure-Inductance.phtml

	=== BOM ===		=== BOM ===
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	** Amplitude op 0 dB		** Amplitude op 0 dB
	** sinus signaal		** sinus signaal
	* Improvements needed :		* Improvements needed:
	** Calculate / measure the currently installed inductance, and bring it up to spec, so that we get a nicer signal split than now		** Calculate / measure the currently installed inductance, and bring it up to spec, so that we get a nicer signal split than now
	* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH		* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH

Gori at 16:48, 12 February 2012

2012-02-12T16:48:54Z

← Older revision		Revision as of 16:48, 12 February 2012
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	=== Results ===		=== Results ===
	<gallery>		<gallery>
	~~[[File~~:1-period.JPG]]		Image:1-period.JPG
	~~[[File~~:2-period.JPG]]		Image:2-period.JPG
	~~[[File~~:4-period.JPG]]		Image:4-period.JPG
	~~[[File~~:8-period.JPG]]		Image:8-period.JPG
	~~[[File~~:chaos.JPG]]		Image:chaos.JPG
	~~[[File~~:circuit.JPG]]		Image:circuit.JPG
	</gallery>		</gallery>

Gori at 16:47, 12 February 2012

2012-02-12T16:47:27Z

← Older revision		Revision as of 16:47, 12 February 2012
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	\|Name=Chaotic circuits		\|Name=Chaotic circuits
	\|Status=Completed		\|Status=Completed
	\|Contact=~~gori~~		\|Contact=User:Gori
	}}		}}

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	* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH		* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH
	=== Results ===		=== Results ===
			<gallery>
	[[File:1-period.JPG]]		[[File:1-period.JPG]]
	[[File:2-period.JPG]]		[[File:2-period.JPG]]
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	[[File:chaos.JPG]]		[[File:chaos.JPG]]
	[[File:circuit.JPG]]		[[File:circuit.JPG]]
			</gallery>

Stappers at 13:27, 23 December 2011

2011-12-23T13:27:53Z

← Older revision		Revision as of 13:27, 23 December 2011
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	__FORCETOC__		__FORCETOC__

	Build a simple ~~electonic~~ chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [http://code.google.com/p/arduinoscope/ an arduino]		Build a simple electronic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [http://code.google.com/p/arduinoscope/ an arduino]

	== Background reading ==		== Background reading ==

Gmc at 09:31, 3 October 2011

2011-10-03T09:31:33Z

← Older revision		Revision as of 09:31, 3 October 2011
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			{{Project
			\|Name=Chaotic circuits
			\|Status=Completed
			\|Contact=gori
			}}

			see also [[IgorsProjectIdeas]]
	see also IgorsProjectIdeas

	__FORCETOC__		__FORCETOC__

	Build a simple electonic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [~~httphttp~~://code.google.com/p/arduinoscope/ an arduino]		Build a simple electonic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [http://code.google.com/p/arduinoscope/ an arduino]

	== Background reading ==		== Background reading ==
Line 57:		Line 61:
	* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH		* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH
	=== Results ===		=== Results ===
	~~%IMAGEGALLERY{}%~~		[[File:1-period.JPG]]
			[[File:2-period.JPG]]
			[[File:4-period.JPG]]
			[[File:8-period.JPG]]
			[[File:chaos.JPG]]
			[[File:circuit.JPG]]

10.42.42.9: Created page with " see also IgorsProjectIdeas FORCETOC Build a simple electonic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [htt..."

2011-10-01T23:20:15Z

Created page with " see also IgorsProjectIdeas __FORCETOC__ Build a simple electonic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [htt..."

New page

see also IgorsProjectIdeas

__FORCETOC__

Build a simple electonic chaos demo for my course. Chaos can be observed using an oscilloscope. A portable one can be built with [httphttp://code.google.com/p/arduinoscope/ an arduino]

== Background reading ==
* One of the simplest possible chaotic circuits : http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf
* This one seems particularly interesting - possibility o encrypt analog sygnal : http://www.fortunecity.com/emachines/e11/86/circsync.html
* http://www.cornellcollege.edu/physics/courses/phy312/Student-Projects/Chaotic-circuits/Chaos.html
* Original paper: [httphttp://link.aps.org/doi/10.1103/PhysRevLett.47.1349 Period Doubling and Chaotic Behavior in a Driven Anharmonic Oscillator]

== Version 2.0 ==
Create the circuit that works at a lower frequency. Smith also describes a circuit that operates at 75 KHz instead of 2 MHz. Main bottle neck is the required large inductance

Goal is to :
* Be able to hear the chaos
* Have the whole thing portable, without the need for an external oscilloscope and signal generator
* Have it nice and presentable so it can be used as a demo

Todo:
* Calculate the inductance and capacitance required to achieve a resonant frequency in the audible range, preferably around 440 Hz. Conservative human hearing range is from 20 Hz to 15 kHz.
* Identify the operational limits of the [httphttp://code.google.com/p/arduinoscope/ arduinoscope] - max seems to be around 200 kHz, well above audible range
* Make sure that an arduino based scope can observe the signal.
* salvage/build/buy an appropriate spool
* create a suitable analogue signal generator that can drive the whole thing. Arduino can no do this, as it has no analogue circuitry for the job. PWM will (propbably) not do.
* Add speakers in order to hear the chaotic harmonics under/overtones
* package it is something transparent so that it makes a nice demo

== Version 1.0 ==
* Following : http://www-physics.ucsd.edu/~des/DSmithChaosExperiment.pdf
* Working oscilloscope and signal generator present, capable of 2Mhz
* Components according to the manual :
** 200 ohm resistor
** inductor, 100 microHenry needed, available a PE-53653 , with 16.1�H
** diode - either works: 1N4001, 1N4004, 1N4005, 1N4007
* As built, the circuit does not display any chaotic behavior as we change the amplitude, The inductor is almost 5 times to weak.
* I have several spools, adding an extra spool in series, bringing the inductance up to 32 �H does not help.
* When adding random spools, it is good to measure its inductance. Here is a way to do it : http://www.daycounter.com/Articles/How-To-Measure-Inductance.phtml

=== BOM ===
* 1N4007 diode
* 220 ohm resistor
* (2 x 16) 32 �H + a random spool (code 471K 98139)
* Signal:
** 1.5 MHz
** Amplitude op 0 dB
** sinus signaal
* Improvements needed :
** Calculate / measure the currently installed inductance, and bring it up to spec, so that we get a nicer signal split than now
* With smedings help, we determined that the inductance of the three coils is 1351 uH or approx 1.4 mH
=== Results ===
%IMAGEGALLERY{}%