home made diodes

8/12/2019 Home Made Diodes

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233

Coming Attractions

%adio %oc&s

E! Cur'e (racer

%adio Circuit )odel

)ineral Diodes * (+ingies

%ust Ne'er Slee,s

+y Diodes )atter


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333

In (+e .eginning

.efore integrated circuits###

.efore transistors###

.efore 'acuum tu/es###

.efore electronics###

### t+ere ere radios1

)odern radio /y E6A.


4/33

433

(+e Sim,lest 3ossi/le %adio

Antenna

4round

Ear,+one

Detector

A) demodulator 5+u+7

A roc& on a +ard ,laceCrystal diode1

(uning 8a+1


5/33

533

)ineral Sam,les

+o &ne

No/ody1

Conflicting stories

(ry all com/inations

)ost don9t or& at all

8o can you tell

Instrumentation1


6/33

633

(+e .ig Idea

:am current 5I7 in

8o muc+

3olarity

)easure 'olts 57 across

%ange

3lot results; cur'es1

It can /e done manually

)ore fun automatically


7/33

733

(+e =ittle Details

(riangle a'e in,ut

200 8z> ? ,ea&

oltage to Current


8/33

833

Enlarged to S+o (eture


9/33

933

Cat9s +is&er 3ro/e

)ineral in metal ,ot

ire ,in-,oint ,ro/e

Steel .ronze Car/on

-ais /all slide mount

S,ringy t+ing

3atience


10/33

1033

8e +o Dies it+ (+e )ost Stuff###

-ais ,ositioner

0#00F resolution

0#GF accessi/le cu/e

!ero /ac&las+

.lac&-/elt dee/dom


11/33

1133

3ro/e and Sam,le 8older

(elesco,ing /rass tu/es

(a,ered cloc& ,ins

S,ringy t+ing

E)( fitting

4ratuitous CNC

=o freHuency cli,s


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1233

Sam,le 8older

ood9s )etal

)a&es solid contact

.ut; PbJCdJ.iJSn

.ut; melts at 60 L

"se Lield9s )etal

Lriction-fit ,ro/e ti,s

Steel> /ronze> car/on

Small differences


13/33

1333

Cali/ration M & %esistor

in,ut mA

Sco,e Aes

@ current 52 mAOdi'7

Y 'oltage 52 Odi'7

=inear1

+e

Set DC offset 0


14/33

1433

Cali/ration M NP

:elly/ean Si diode

fd

0#G

3retty closeIre'

zilc+

=imited /y diff am,9sin,ut resistance


15/33

1533

Iron 3yrite

4reen trace

Nearly a resistor

%ed trace

)ore li&e a diode

.lue trace

.ot+ /etter * orse

Same lum,1

3ro/e material


16/33

1633

S,ice Circuit )odel

Diode sitc+

oltage controlled

)ay/e a lousy sitc+

%esistance from ,lots

% Q OQ I slo,e

C * %2 R ear,+one

8ig+ im,edance

2 A) signal1


17/33

1733

A) Demodulation

=o 'oltage %L

(+is is /efore tu/es1

3oor diodes are


18/33

1833

Iron 3yrite

8u+

Sorta !ener-is+

)arginal diode

Lor lo I * > anyay


19/33

1933

=ead - 4alena

.ac&ards ,olarity

+ate'er t+at means

=o fd

.ronze ,ro/e

.est of a /ad sam,le

+o &ne)ay/e it9s Uust lead


20/33


21/33

2133

C+alco,yrite

It9s a Diac1

.ilateral trigger diode

It9s a resistor1

Lor verylo I

Negati'e resistance

Current W oltage X

Note scale c+ange

G and G mA O di'


22/33

2233

4al'anized Steel

3ro,ane torc+

=ittle /lac& s,ots

Do t+is outdoors1

Iron-tin-zinc alloy

Cadmium Ick!

=oo&s li&e +ig+ %

And not a diode

.ut ait


23/33

2333

4al'anized Steel .estiary


24/33

2433

%ust Ne'er Slee,s


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2533

Steel Corrosion

Nonlinear

Symmetric

Sorta> &inda

Negati'e resistance


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2633

=inear )iing Circuit

=inear miing


27/33

2733

=inear )iing %esults


28/33


29/33

2933

Nonlinear )iing %esult


30/33

3033

%L 's# (+e %usty .olt

)ountainto, radio

Manytransmitters

8ig+ %L field intensity

Sensiti'e recei'ers

4al'anized toers

Acid rain

Corrosion

Intermodulation1

BnLBmL

2B,L

B )t .eacon NY - 3+oto /y .2""


31/33

3133

DIY Diodes

(+ey9re e'ery+ere

(+ey9re c+ea,

not t+at ,ositioner

(+ey9re easy> sorta

You9ll learn

a/out electronics

a/out ,atience

Demo: Sunday AM!!


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%eferences

)y column in Circuit Cellar magazine; #circuitcellar#com +as file of scri,ts> ,ictures> ot+er stuffLe/ruary * A,ril 200 descri/e nonlinear freHuency miing

Semiconductor cur'e tracer using 3C sound card; 4eorge Ste/er> .P=ICircuit Cellar> :an 200A%%= ZE@> :uly 2006; +tt,;OO#arrl#orgOHeO2006O0[OH[ste/er#,df

4ood o'er'ie of crystal-set ,arameters; +tt,;OO#oldradioorld#deOgollumOanalysis#+tm

!inc negati'e resistance oscillators; +tt,;OO+ome#eart+linnetO\lenyrOzincosc#+tm

4al'anic Series ta/le; +tt,;OO#ocean#udel#eduOseagrantO,u/licationsOcorrosion#+tml

ood9s metal> s,rings> ,+os,+or /ronze s+eet> tools from )icro)ar&; +tt,;OOmicromarcomO

(a,er ,ins and small ,arts from S# =a%ose> Inc; +tt,;OO#slarose#comO5dead on ? Aug 067

Ca,turing oscillosco,e traces it+ Kermit; +tt,;OO#colum/ia#eduO&ermitOinde#+tml

Con'erting 834= to /itma,s it+ +,2 utility; +tt,;OO#gnu#orgOsoftareO+,2O
http://www.circuitcellar.com/http://www.arrl.org/qex/2006/07/qx7steber.pdfhttp://www.oldradioworld.de/gollum/analysis.htmhttp://home.earthlink.net/~lenyr/zincosc.htmhttp://www.ocean.udel.edu/seagrant/publications/corrosion.htmlhttp://micromark.com/http://www.slarose.com/http://www.columbia.edu/kermit/index.htmlhttp://www.gnu.org/software/hp2xx/http://www.gnu.org/software/hp2xx/http://www.columbia.edu/kermit/index.htmlhttp://www.slarose.com/http://micromark.com/http://www.ocean.udel.edu/seagrant/publications/corrosion.htmlhttp://home.earthlink.net/~lenyr/zincosc.htmhttp://www.oldradioworld.de/gollum/analysis.htmhttp://www.arrl.org/qex/2006/07/qx7steber.pdfhttp://www.circuitcellar.com/


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+o Am I

Ed Nisley

Say NISS-leeF> e'en t+oug+ myancestors ere +alf-essed

Engineer> aut+or> tin&er> family guyCircuit Cellar; A/o'e t+e 4round3lane - #circuitcellar#com

Analog * %L stuff

Dr Do//9s :ournal; Nisley9sNote/oo& - #ddU#com

Em/edded systems * +ardare stuff

Se,t 62
http://www.circuitcellar.com/http://www.ddj.com/http://www.ddj.com/http://www.circuitcellar.com/

home made diodes

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