On Nov 2, 12:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote:
> I have access to a Schumacher wheeled battery charger that is 12 v > only.
> I want to use its boost feature (200amp) on 6 volt systems.
> Any suggestions as to how to make a mod where the charger will do both > 12v and 6v?
That's a kilowatt problem, of course... If the charger has inductive filtering on the outputs (this is likely, because it allows better rectifier conduction duty cycle, keeps things cheaper), then you might be able to lower the RMS input voltage from 120VAC to something lower, and get proportional output. Some kinds of light dimmer (the ones for inductive loads, like dimmed halogen-lights-on-a-transformer) can safely handle it.
>I have access to a Schumacher wheeled battery charger that is 12 v > only.
> I want to use its boost feature (200amp) on 6 volt systems.
> Any suggestions as to how to make a mod where the charger will do both > 12v and 6v?
> I have looked and have not found any schematics.
> I am assuming that any mods will be downstream of the transformer.
I think that's not a good assumption. You need about a 6 volt tap on the transformer. I had an old battery charger/car starter that put out 300 amps at 10.5 volts. Somebody stole it, %$&^%! Mike
Too_Many_Tools wrote: > On Nov 2, 2:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote: >> I have access to a Schumacher wheeled battery charger that is 12 v >> only.
>> I want to use its boost feature (200amp) on 6 volt systems.
>> Any suggestions as to how to make a mod where the charger will do >> both 12v and 6v?
>> I have looked and have not found any schematics.
>> I am assuming that any mods will be downstream of the transformer.
>> Thanks for any suggestions.
>> TMT
> Let's try casting the net a bit further...anyone else have a > suggestion as to how to do a conversion? > Thanks
> TMT
Why don't you open it up and see if its got any taps on the output of the transformer. Or if you are lucky a 220/230 volt centre tapped primary winding.
<too_many_to...@yahoo.com> wrote: >On Nov 2, 2:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote: >> I have access to a Schumacher wheeled battery charger that is 12 v >> only.
>> I want to use its boost feature (200amp) on 6 volt systems.
>> Any suggestions as to how to make a mod where the charger will do both >> 12v and 6v?
>> I have looked and have not found any schematics.
>> I am assuming that any mods will be downstream of the transformer.
>> Thanks for any suggestions.
>> TMT
>Let's try casting the net a bit further...anyone else have a >suggestion as to how to do a conversion?
--- Since the boost function is only used to try to start an engine, then figure if you want to cut the 12V down to 6 and you want to be drawing 200 amps at that time, then you might be able to just insert a 30 milliohm 1200 watt resistor between the battery and the charger.
There are power resistors available from various vendors which you could use:
<too_many_to...@yahoo.com> wrote: >On Nov 2, 2:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote: >> I have access to a Schumacher wheeled battery charger that is 12 v >> only.
>> I want to use its boost feature (200amp) on 6 volt systems.
>> Any suggestions as to how to make a mod where the charger will do both >> 12v and 6v?
>> I have looked and have not found any schematics.
>> I am assuming that any mods will be downstream of the transformer.
>> Thanks for any suggestions.
>> TMT
>Let's try casting the net a bit further...anyone else have a >suggestion as to how to do a conversion? >Thanks
> tell them what you want to do, and see if they can't come up with a > solution for you. Or, at the very least, a schematic.
> If they can't help you with anything more than a schematic and you can > post it, then do that and maybe someone from around here will help you > out.
> If you can't get a schematic, you can always "reverse engineer" the > thing, post what you find, and skin the cat that way.
> JF- Hide quoted text -
> - Show quoted text -
I am not trying to be a smartass.
My apologies to anyone who thought I was.
When a question is out there for days with minimal responses, you prompt the group for any other comments before moving on..which I did.
> On Wed, 4 Nov 2009 11:51:47 -0800 (PST), Too_Many_Tools
> <too_many_to...@yahoo.com> wrote: > >On Nov 2, 2:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote: > >> I have access to a Schumacher wheeled battery charger that is 12 v > >> only.
> >> I want to use its boost feature (200amp) on 6 volt systems.
> >> Any suggestions as to how to make a mod where the charger will do both > >> 12v and 6v?
> >> I have looked and have not found any schematics.
> >> I am assuming that any mods will be downstream of the transformer.
> >> Thanks for any suggestions.
> >> TMT
> >Let's try casting the net a bit further...anyone else have a > >suggestion as to how to do a conversion?
> --- > Since the boost function is only used to try to start an engine, then > figure if you want to cut the 12V down to 6 and you want to be drawing > 200 amps at that time, then you might be able to just insert a 30 > milliohm 1200 watt resistor between the battery and the charger.
> There are power resistors available from various vendors which you could > use:
> On Wed, 4 Nov 2009 11:51:47 -0800 (PST), Too_Many_Tools > <too_many_to...@yahoo.com> wrote:
snip
I presume this is one of those wheel around big guys seen at repair shops and service stations.
I take it that the 200 amp is a feature you can select to start vehicles if you are in a big hurry and can't wait for the original battery to accept an adequate charge.
The 6 volt battery will, for a time, swamp the 14-16 volt charging voltage output down to the 7 or 8 volts if you hook it up as is. Better if you have a trickle charge or lower charging current feature selection to buy yourself more time with the 12 volt charging hook up.
You could then actuate the 200 amp feature to see if you can start the problematic vehicle. But I wouldn't leave it on for long.
Older chargers used selenium rectifier stacks and they have a built in current limiting (intrinsic resistance) and are very conservatively built.
Charging batteries is hazardous even with the right equipment, but unless this is a very tiny ampere hour battery, you should be able to do it for a minute or two before you start heating up the plates and permanently destroying the battery and possibly the rest of the automotive electrical system.
The suggestion about adding another 6 volt battery in series would work as well, you would have to position it between the vehicle being charged and hook up the positive of the vehicle battery to the negative pole of this added battery. The positive of the added battery going to the potitive lead of the charger.
Too_Many_Tools wrote: > On Nov 4, 1:51 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote: >> On Nov 2, 2:25 pm, Too_Many_Tools <too_many_to...@yahoo.com> wrote:
>> > I have access to a Schumacher wheeled battery charger that is 12 v >> > only.
>> > I want to use its boost feature (200amp) on 6 volt systems.
>> > Any suggestions as to how to make a mod where the charger will do >> > both 12v and 6v?
>> > I have looked and have not found any schematics.
>> > I am assuming that any mods will be downstream of the transformer.
>> > Thanks for any suggestions.
>> > TMT
>> Let's try casting the net a bit further...anyone else have a >> suggestion as to how to do a conversion? >> Thanks
>> TMT
> Okay...I found a schematic of a similar charger that Sears sells....
<too_many_to...@yahoo.com> wrote: >On Nov 8, 8:14 am, John Fields <jfie...@austininstruments.com> wrote: >> On Sat, 7 Nov 2009 22:55:59 -0800 (PST), Too_Many_Tools
>> <too_many_to...@yahoo.com> wrote: >> >The schematic is a valid one...who do you think makes the Sears >> >charger?
>> --- >> What difference does it make?
>> Even if it's Schumacher there's no guarantee that the one you have is >> the one the schematic is for.
>> Again, why don't you contact Schumacher and ask _them_ for help?
>> JF
>I did. ;<)
--- And??? ---
>As a designer, your employer would expect you to work with what is >made available to you.
--- Obviously not being a designer, it seems you think that product "B" can be modified by looking at documentation from product "A" without regard to the actual implementation of product "B".
Such is not the case and, as a designer, I would expect my employer to supply me with documentation sufficient to accomplish the task at hand or request that I reverse engineer the product in order to generate the needed documentation. ---
>You have an schematic in front of you.
--- No, I don't. I have a screen telling me that no parts are available for "that model". ---
>If you have a design suggestion as to how to implement the requested >design change, please offer it.
--- I offered two _real_ solutions commensurate with the data you supplied. ---
>If not, admit that you cannot do it.
--- So, you're not trying to be a smart-ass, huh?
It must be inherent in your nature, then. ---
>Thanks for any positive suggestion that you can offer.
--- I suggested that you take some photos of the charger's internals and post them so we might have a look at what's going on in there but, so far, nothing.
If you expect help you might at least put in a little effort yourself, yes?
> On Sun, 8 Nov 2009 18:45:11 -0800 (PST), Too_Many_Tools
> <too_many_to...@yahoo.com> wrote: > >On Nov 8, 8:14 am, John Fields <jfie...@austininstruments.com> wrote: > >> On Sat, 7 Nov 2009 22:55:59 -0800 (PST), Too_Many_Tools
> >> <too_many_to...@yahoo.com> wrote: > >> >The schematic is a valid one...who do you think makes the Sears > >> >charger?
> >> --- > >> What difference does it make?
> >> Even if it's Schumacher there's no guarantee that the one you have is > >> the one the schematic is for.
> >> Again, why don't you contact Schumacher and ask _them_ for help?
> >> JF
> >I did. ;<)
> --- > And??? > ---
> >As a designer, your employer would expect you to work with what is > >made available to you.
> --- > Obviously not being a designer, it seems you think that product "B" can > be modified by looking at documentation from product "A" without regard > to the actual implementation of product "B".
> Such is not the case and, as a designer, I would expect my employer to > supply me with documentation sufficient to accomplish the task at hand > or request that I reverse engineer the product in order to generate the > needed documentation. > ---
> >You have an schematic in front of you.
> --- > No, I don't. I have a screen telling me that no parts are available for > "that model". > ---
> >If you have a design suggestion as to how to implement the requested > >design change, please offer it.
> --- > I offered two _real_ solutions commensurate with the data you supplied. > ---
> >If not, admit that you cannot do it.
> --- > So, you're not trying to be a smart-ass, huh?
> It must be inherent in your nature, then. > ---
> >Thanks for any positive suggestion that you can offer.
> --- > I suggested that you take some photos of the charger's internals and > post them so we might have a look at what's going on in there but, so > far, nothing.
> If you expect help you might at least put in a little effort yourself, > yes?
<too_many_to...@yahoo.com> wrote: >On Nov 10, 7:48 am, John Fields <jfie...@austininstruments.com> wrote: >> On Sun, 8 Nov 2009 18:45:11 -0800 (PST), Too_Many_Tools
>> <too_many_to...@yahoo.com> wrote: >> >On Nov 8, 8:14 am, John Fields <jfie...@austininstruments.com> wrote: >> >> On Sat, 7 Nov 2009 22:55:59 -0800 (PST), Too_Many_Tools
>> >> <too_many_to...@yahoo.com> wrote: >> >> >The schematic is a valid one...who do you think makes the Sears >> >> >charger?
>> >> --- >> >> What difference does it make?
>> >> Even if it's Schumacher there's no guarantee that the one you have is >> >> the one the schematic is for.
>> >> Again, why don't you contact Schumacher and ask _them_ for help?
>> >> JF
>> >I did. ;<)
>> --- >> And??? >> ---
>> >As a designer, your employer would expect you to work with what is >> >made available to you.
>> --- >> Obviously not being a designer, it seems you think that product "B" can >> be modified by looking at documentation from product "A" without regard >> to the actual implementation of product "B".
>> Such is not the case and, as a designer, I would expect my employer to >> supply me with documentation sufficient to accomplish the task at hand >> or request that I reverse engineer the product in order to generate the >> needed documentation. >> ---
>> >You have an schematic in front of you.
>> --- >> No, I don't. I have a screen telling me that no parts are available for >> "that model". >> ---
>> >If you have a design suggestion as to how to implement the requested >> >design change, please offer it.
>> --- >> I offered two _real_ solutions commensurate with the data you supplied. >> ---
>> >If not, admit that you cannot do it.
>> --- >> So, you're not trying to be a smart-ass, huh?
>> It must be inherent in your nature, then. >> ---
>> >Thanks for any positive suggestion that you can offer.
>> --- >> I suggested that you take some photos of the charger's internals and >> post them so we might have a look at what's going on in there but, so >> far, nothing.
>> If you expect help you might at least put in a little effort yourself, >> yes?
> On Tue, 10 Nov 2009 18:49:22 -0800 (PST), Too_Many_Tools
> <too_many_to...@yahoo.com> wrote: > >On Nov 10, 7:48 am, John Fields <jfie...@austininstruments.com> wrote: > >> On Sun, 8 Nov 2009 18:45:11 -0800 (PST), Too_Many_Tools
> >> <too_many_to...@yahoo.com> wrote: > >> >On Nov 8, 8:14 am, John Fields <jfie...@austininstruments.com> wrote: > >> >> On Sat, 7 Nov 2009 22:55:59 -0800 (PST), Too_Many_Tools
> >> >> <too_many_to...@yahoo.com> wrote: > >> >> >The schematic is a valid one...who do you think makes the Sears > >> >> >charger?
> >> >> --- > >> >> What difference does it make?
> >> >> Even if it's Schumacher there's no guarantee that the one you have is > >> >> the one the schematic is for.
> >> >> Again, why don't you contact Schumacher and ask _them_ for help?
> >> >> JF
> >> >I did. ;<)
> >> --- > >> And??? > >> ---
> >> >As a designer, your employer would expect you to work with what is > >> >made available to you.
> >> --- > >> Obviously not being a designer, it seems you think that product "B" can > >> be modified by looking at documentation from product "A" without regard > >> to the actual implementation of product "B".
> >> Such is not the case and, as a designer, I would expect my employer to > >> supply me with documentation sufficient to accomplish the task at hand > >> or request that I reverse engineer the product in order to generate the > >> needed documentation. > >> ---
> >> >You have an schematic in front of you.
> >> --- > >> No, I don't. I have a screen telling me that no parts are available for > >> "that model". > >> ---
> >> >If you have a design suggestion as to how to implement the requested > >> >design change, please offer it.
> >> --- > >> I offered two _real_ solutions commensurate with the data you supplied. > >> ---
> >> >If not, admit that you cannot do it.
> >> --- > >> So, you're not trying to be a smart-ass, huh?
> >> It must be inherent in your nature, then. > >> ---
> >> >Thanks for any positive suggestion that you can offer.
> >> --- > >> I suggested that you take some photos of the charger's internals and > >> post them so we might have a look at what's going on in there but, so > >> far, nothing.
> >> If you expect help you might at least put in a little effort yourself, > >> yes?
> >> JF- Hide quoted text -
> >> - Show quoted text -
> >So, you're not trying to be a smart-ass, huh?
> >Thanks for playing.
> --- > Figgered...
> JF- Hide quoted text -
> - Show quoted text -
So John...if you are a designer...and I do emphasize IF...your behavior here indicates that you are not a team player you could be.
I have supplied you and others with sufficient info to determine a design opinion.
Others have been able to supply information (which I do appreciate) while you seem to be unable to.
I have also posted this same question elsewhere..and again no one else is complaining like you are.
While I thank you for what positive comments you have offered, you may want to reflect on why you alone seem to have a continuing problem with a simple design consultation.
Good luck with your career and have a nice and productive day.
<too_many_to...@yahoo.com> wrote: >On Nov 11, 8:16 am, John Fields <jfie...@austininstruments.com> wrote: >> On Tue, 10 Nov 2009 18:49:22 -0800 (PST), Too_Many_Tools
>> <too_many_to...@yahoo.com> wrote: >> >On Nov 10, 7:48 am, John Fields <jfie...@austininstruments.com> wrote: >> >> On Sun, 8 Nov 2009 18:45:11 -0800 (PST), Too_Many_Tools
>> >> <too_many_to...@yahoo.com> wrote: >> >> >On Nov 8, 8:14 am, John Fields <jfie...@austininstruments.com> wrote: >> >> >> On Sat, 7 Nov 2009 22:55:59 -0800 (PST), Too_Many_Tools
>> >> >> <too_many_to...@yahoo.com> wrote: >> >> >> >The schematic is a valid one...who do you think makes the Sears >> >> >> >charger?
>> >> >> --- >> >> >> What difference does it make?
>> >> >> Even if it's Schumacher there's no guarantee that the one you have is >> >> >> the one the schematic is for.
>> >> >> Again, why don't you contact Schumacher and ask _them_ for help?
>> >> >> JF
>> >> >I did. ;<)
>> >> --- >> >> And??? >> >> ---
>> >> >As a designer, your employer would expect you to work with what is >> >> >made available to you.
>> >> --- >> >> Obviously not being a designer, it seems you think that product "B" can >> >> be modified by looking at documentation from product "A" without regard >> >> to the actual implementation of product "B".
>> >> Such is not the case and, as a designer, I would expect my employer to >> >> supply me with documentation sufficient to accomplish the task at hand >> >> or request that I reverse engineer the product in order to generate the >> >> needed documentation. >> >> ---
>> >> >You have an schematic in front of you.
>> >> --- >> >> No, I don't. I have a screen telling me that no parts are available for >> >> "that model". >> >> ---
>> >> >If you have a design suggestion as to how to implement the requested >> >> >design change, please offer it.
>> >> --- >> >> I offered two _real_ solutions commensurate with the data you supplied. >> >> ---
>> >> >If not, admit that you cannot do it.
>> >> --- >> >> So, you're not trying to be a smart-ass, huh?
>> >> It must be inherent in your nature, then. >> >> ---
>> >> >Thanks for any positive suggestion that you can offer.
>> >> --- >> >> I suggested that you take some photos of the charger's internals and >> >> post them so we might have a look at what's going on in there but, so >> >> far, nothing.
>> >> If you expect help you might at least put in a little effort yourself, >> >> yes?
>> >> JF- Hide quoted text -
>> >> - Show quoted text -
>> >So, you're not trying to be a smart-ass, huh?
>> >Thanks for playing.
>> --- >> Figgered...
>> JF- Hide quoted text -
>> - Show quoted text -
>So John...if you are a designer...and I do emphasize IF...your >behavior here indicates that you are not a team player you could be.
--- You mean you dislike the fact that I criticized your attitude?
As far as I'm concerned you _are_ a smartass and you also seem to be a troll trying to foment discord with your entry level slurs.
And, yes, I'm not a team player; I run a solo act. ---
>I have supplied you and others with sufficient info to determine a >design opinion.
--- In your opinion, but you're certainly no designer, so how would you know?
You haven't even, for example, replied to the query as to whether or not you have a transformer with a dual or a center-tapped primary, which is crucial information for designers ---
>Others have been able to supply information (which I do appreciate) >while you seem to be unable to.
--- If you think I haven't, then you either have a very short attention span or you have rather limited reading skills, since I suggested a resistive voltage-dropper, contacting the charger manufacturer, (which you said you did, but never replied to the group with what you found out) and photographing the internals of your charger and posting the pics, which you never did either. ---
>I have also posted this same question elsewhere..and again no one else >is complaining like you are.
--- I think they're mostly ignoring your little epithets. As a matter of course, I choose not to. ---
>While I thank you for what positive comments you have offered, you may >want to reflect on why you alone seem to have a continuing problem >with a simple design consultation.
--- LOL, if you think this is a design consultation you're the one with the problem. ---
>Good luck with your career and have a nice and productive day.
|
