elektroda.net NewsGroups Forum Index - Electronics AUS - Fast zener diode substitute
ian field
Guest
Guest
Tue Feb 09, 2010 3:13 pm
"Yvan" <killefitz_at_invalid.invalid> wrote in message
news:hkpp39$ht3$1_at_news.eternal-september.org...
Quote:
Nedavno ian field napisa:
I was suggesting you use that search as a starting point, download the
data sheets and compare the spec with the type you want to replace.
Since I do not know what values to compare, that does not help a lot
My knowledge in electronics is limited to finding schematics on the
Internet, drawing a board in eagle, and soldering components to it.
I've had a cursory glance at the schematic you plan to build, and I'm
a little sceptical about "battery revitalisers" that take pulsed
current without incorporating a float charger to replenish the energy
taken - if left and forgotten it will eventually discharge the battery
and cause sulphation.
This circuit is not a battery revitaliser as I understand it this is
sort of sulphation preventer. I am also building battery revitaliser:
http://home.comcast.net/~ddenhardt201263/desulfator/n_channel_schem.gif
It is also possible to do the same job with a much simpler circuit.
If you start with a simple current limiting PSU as a float charger,
you can add a zero-crossing detector to the rectifier section and use
the narrow pulses to switch the MOSFET which then takes pulses of
current from the battery as in the Elektor project.
As I wrote I have (very) limited knowledge in electronics, so unless you
give me a link to the schematics, this does not help. I have a lot to
learn, but very little time for that, unfortunately.
I was suggesting you use that search as a starting point, download the
data sheets and compare the spec with the type you want to replace.
Since I do not know what values to compare, that does not help a lot
My knowledge in electronics is limited to finding schematics on the
Internet, drawing a board in eagle, and soldering components to it.
I've had a cursory glance at the schematic you plan to build, and I'm
a little sceptical about "battery revitalisers" that take pulsed
current without incorporating a float charger to replenish the energy
taken - if left and forgotten it will eventually discharge the battery
and cause sulphation.
This circuit is not a battery revitaliser as I understand it this is
sort of sulphation preventer. I am also building battery revitaliser:
http://home.comcast.net/~ddenhardt201263/desulfator/n_channel_schem.gif
It is also possible to do the same job with a much simpler circuit.
If you start with a simple current limiting PSU as a float charger,
you can add a zero-crossing detector to the rectifier section and use
the narrow pulses to switch the MOSFET which then takes pulses of
current from the battery as in the Elektor project.
As I wrote I have (very) limited knowledge in electronics, so unless you
give me a link to the schematics, this does not help. I have a lot to
learn, but very little time for that, unfortunately.
TBH if you're that much a novice, this project probably isn't suitable to
practice on. Its not all that difficult to damage a lead acid battery if you
don't fully understand correct charge management, and not too difficult to
damage yourself an/or burn your house down.
If you want to jump in at the deep end and mess with lead acid batteries
which can supply potentially dangerously large currents, I suggest you make
the time to stick your nose in a book and learn some of the basics.
A good resource for books is News:alt.binaries.e-book.technical there is a
regular contributor who periodically posts large collections of books, he's
on Bio and Med at the moment and did the electronics collection a little
while ago - so unfortunately you'll have to wait until he re-posts it again.
Yvan
Guest
Guest
Tue Feb 09, 2010 3:41 pm
Nedavno ian field napisa:
Quote:
I suggest you make
the time to stick your nose in a book and learn some of the basics.
the time to stick your nose in a book and learn some of the basics.
OK, thanks.
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ian field
Guest
Guest
Tue Feb 09, 2010 5:26 pm
"Yvan" <killefitz_at_invalid.invalid> wrote in message
news:hkrs6h$7j2$1_at_news.eternal-september.org...
Quote:
Nedavno ian field napisa:
<snip>
Quote:
I suggest you make
the time to stick your nose in a book and learn some of the basics.
snip
the time to stick your nose in a book and learn some of the basics.
snip
Quote:
OK, thanks.
Its customary to indicate; <snip> where you have snipped content/context,
but as you are a novice I've added them for you.
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