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zener diode
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Topic: zener diode (Read 1127 times)
Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
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zener diode
«
on:
17.07. 2014 19:59 »
hi , again everybody , i have a zener diode in my box of tricks , i wonder if anyone can tell me a simple way to find out if it is neg earth or poss earth, as there are no markings on it and pretty expensive for a new one thanks tw
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Semper in excretia sumus solum profundum veriat.
a10 gf
Global Moderator
Wise & Enlightened
Join Date: Sep 2006
Posts: 3192
Karma: 57
West Coast, Norway & Alpes Maritimes, France
Re: zener diode
«
Reply #1 on:
17.07. 2014 21:52 »
A little offtopic, but interesting >
http://en.wikipedia.org/wiki/Clarence_Zener
More:
http://en.wikipedia.org/wiki/Zener_diode
Am learning about 'quantum tunnelling' and 'avalanche breakdown' lol+++
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Stand with
A10 GF '53
My A10 website
"Success only gets you a ticket to a much more difficult task"
KiwiGF
Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
Wise & Enlightened
Join Date: Feb 2011
Posts: 1940
Karma: 17
Re: zener diode
«
Reply #2 on:
17.07. 2014 21:55 »
Maybe try 2 x 12v bulb in series and 2 x12v battery in series to see which way it conducts?
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New Zealand
1956 A10 Golden Flash (1st finished project)
1949 B31 rigid “400cc” (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts
duTch
Ricketty Rocketty Golden Flashback
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Posts: 4528
Karma: 41
Re: zener diode
«
Reply #3 on:
17.07. 2014 23:06 »
Kiwi, why two of each....?
Maybe you could just do the same with a multi meter...?
Do they come with different voltage ratings..?
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia
wilko
Resident Legend
Join Date: Mar 2010
Posts: 681
Karma: 4
Re: zener diode
«
Reply #4 on:
18.07. 2014 00:22 »
If it's an original Lucas one they were only ever positive earth.
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Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
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Re: zener diode
«
Reply #5 on:
18.07. 2014 09:07 »
thanks everybody , it has lucas stamped on the spade connection so it must be poss earth , thanks again . tw ps that tunnell is a bit too deep for my liking a10gf
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a10 gf
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West Coast, Norway & Alpes Maritimes, France
Re: zener diode
«
Reply #6 on:
18.07. 2014 09:43 »
"
Either the Zener or the avalanche effect may occur independently, or both may occur simultaneously
"
and it seems "
minority carriers
" are involved.
That should clearly explain it
+++
(Sorry for the offtopic)
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Stand with
A10 GF '53
My A10 website
"Success only gets you a ticket to a much more difficult task"
KiwiGF
Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
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Join Date: Feb 2011
Posts: 1940
Karma: 17
Re: zener diode
«
Reply #7 on:
18.07. 2014 10:33 »
heh dutch, zeners have different voltage ratings but for bikes will be designed for 12v regulation albeit there might be one out there for 6v i suppose.
As a zener for 12v regulation would not conduct until over 12v was reached by the genny you need more than 12v to test it.......I think.
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New Zealand
1956 A10 Golden Flash (1st finished project)
1949 B31 rigid “400cc” (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts
Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
Karma: 0
Re: zener diode
«
Reply #8 on:
18.07. 2014 12:48 »
i think you are too far in the tunnell a10gf , i hope you get out ok
tw
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duTch
Ricketty Rocketty Golden Flashback
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Posts: 4528
Karma: 41
Re: zener diode
«
Reply #9 on:
18.07. 2014 13:35 »
Ta Kiwi, is just 'cos I don't know if the early unit-const jobbies were 6v, or 12v....or even if they use the same regulation system.
Other than that, apart from what I read in a10gf 's wiki post that they do flow reverse, I know just a little more than enough to be dangerous...
a10gf, stay outta those quantunnels- wouldn't like you having an avalanche breakdown- never know where you'd end up...!
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia
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The BSA A7-A10 Forum
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zener diode