Krystallet i en elektronisk lighter.

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Hej

Kan krystallet i en elektronisk lighter bringes til at svinge i en
oscillator ?

OW

Re: Krystallet i en elektronisk lighter. [ Piezoelectric [resonance] Transformers ? ]
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Hej Ole

Det vil du sikkert kunne.

Krystallet vil sikkert svinge med en hørbar frekvens.

-

Prøv det øverste kredsløb - i stedet for 2N3904 kan du anvende:
BC547, BC548, BC549, BC550, BC172, BC173, BC108 (basis i midten)
2N2219, 2N3904, 2N2222 (kollektor i midten)
- eller andre NPN transistorer.

Juster evt. R1 så UR2 er ca. 6V (4-8V er fint). C1 og C2 skal have øget
deres værdier med samme faktor;  f.eks. 10, 100,...:

Crystal Oscillators:
http://www.geocities.com/raiu_harrison/mwa/tech/circuits/osc-xtal.html

-

CMOS oscillator baseret på 4049UB (3-15V):

Application Note 340 HCMOS [også fint til standard CMOS] Crystal
Oscillators:
http://www.fairchildsemi.com/an/AN/AN-340.pdf

Crystal 32.768KHz CMOS Oscillator:
http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem.html#ASCIISCHEM_008

-

Introduction to Fundamental Crystal Oscillators
This side will explain some different Crystal Oscillators:
http://hem.passagen.se/communication/txo.html

-

Eksempler på bemærkelsesværdige piezo-elektriske anvendelser:


50 Years of Piezoelectric Transformers. Trends in the Technology:
http://www.mrs.org/s_mrs/sec_subscribe.asp?CID26%19&DID11%6058&action=detail
Citat: "...
These devices are typically manufactured using piezoelectric ceramic
materials that vibrate in resonance.
...
Today's, PTs [Piezoelectric Transformers] are used for backlighting LCD
displays in notebook computers, PDAs, and other handheld devices.
...
Soon (if not already), this technology will become a serious candidate
for replacing the magnetic transformers in cost-sensitive applications.
...
Transoner laminated radial PT has been demonstrated as the most
promising technology for achieving high power levels. Higher powers than
100W, with power densities in the range of 30-40 W/cm2 have been
demonstrated. Micro-PTs are currently being developed with sizes of less
than 5mm diameter and 1mm thickness allowing up to 0.5W power transfer
and up to 50 times gain.
..."

Twitching Transformers by Alfredo Vazquez Carazo:
http://www.worldandi.com/newhome/public/2004/april/nspub1.asp
Citat: "...
The heavy adapters required by all kinds of battery-operated equipment
are about to go the way of the vacuum tube, being replaced by
lightweight and compact solid-state devices.
...
For laptop computers, the extreme application, the voltage step-up is
from 18 to 1,000 volts.
...
Piezoelectric components are widespread but largely unknown in modern
society. Ultrasonic (that is, piezoelectric) motors, for example, are
essential to the function of many point-and-shoot cameras; piezoelectric
actuators are used in ink-jet printers; and piezoelectric filters are
used in spread-spectrum cordless phones [see "Secret Spreading" in The
World & I, April 2003] and digital audio equipment.
...
Rosen's approach involved using a single rectangular block of PZT
polycrystalline ceramic comprising two distinct polarization zones.
Rosen created the two zones by applying different polarizing voltages to
the halves of the block.
...
Several attempts at using piezo transformers as igniters were reported.
...
The power density demonstrated for these piezo transformers exceeds 30 W
per cubic centimeter (cm3), roughly six times more than similar magnetic
transformers, and is expected to pass the 40 W/cm3 benchmark in the near
future.
..."

Piezo Electric Gyroscope:
http://gyroscope.com/d.asp?product=PIEZO

4 Cylinder Gas Powered Engine:
http://gyroscope.com/d.asp?product4C%YLINDER
Citat: "...
As with all our gas powered engines it has a *Piezo* ignition system.
..."

Piezoelectric Crystals - Ignitor from Lighter 1:
http://rimstar.org/materials/piezo/ignitor1.htm

Piezoelectric Crystals - Rochelle Salt Crystal 1;
http://rimstar.org/materials/piezo/rochelle1.htm

An accelerometer made from a lighter:
http://folk.ntnu.no/bardlund/lighteraccelerometer.jsp


Seismic detector:
http://www.electronics-lab.com/projects/science/004/index.html
Citat: "...
The piezoelectric element of a kitchen gas lighter is used in this
simple, yet effective seismic detector.
...
The whole box is acoustically and electromagnetically screened.
..."

-

Lidt andet:

http://en.wikipedia.org/wiki/Ute_Tribe#Northern_Ute_culture
Citat: "...
The Uncompahgre Ute Indians from central Colorado are one of the first
documented groups of people in the world known to utilize the effect of
*mechanoluminescence* through the use of quartz crystals to generate
light, likely hundreds of years before the modern world recognized the
phenomenon. The Ute constructed special ceremonial rattles made from
buffalo rawhide which they filled with clear quartz crystals collected
from the mountains of Colorado and Utah. When the rattles were shaken at
night during ceremonies, the friction and mechanical stress of the
quartz crystals impacting together produced flashes of light which
partly shone through the translucent buffalo hide.
..."

hilsen

Glenn

Re: Krystallet i en elektronisk lighter. [ Piezoelectric [resonance] Transformers ? ]
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...

Hej Ole

2N2219, 2N3904, 2N2222 har også basis i midten!:

http://komponenten.es.aau.dk/fileadmin/komponenten/Data_Sheet/Transistor/2N2219.pdf

http://en.wikipedia.org/wiki/2N2222

http://www.fairchildsemi.com/ds/2N/2N3904.pdf

hilsen

Glenn

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