capacitor/battery question - diagram valid? -
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Posts: 46,084
So you're saying that the circuit that I drew will not work
(http://www.geocities.com/a_drunken_dwarf/stuff/backpack_diagram.GIF)
? Could you try to edit it in paint or some other program to show me
how to change it if possible? Thank you very very much!
--- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> Your idea of using a capacitor to increase short term current
capability
> from your battery is valid, however, you place the capacitor
across the
> battery and then discharge the capacitor through the muscle wire
when you
> wish to activate it not in series with the wire.
> jim
> http://www.geocities.com/jimforkin2003/
>
>
>
Original Message
> From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> Sent: Tuesday, November 11, 2003 8:24 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] capacitor/battery question
>
>
> hey,
>
> I'm using 'muscle wires' which require a rapid pulse of high
> amperage current to contract. I'm trying to use the smallest
battery
> that will be able to contract the wire. I'm currently using a
camera
> flash battery, which can handle pulse currents high enough to
> contact my muscle wire. The problem is that this flash battery is
> too large and heavy for my robot. Unfortunately, most other small
> batteries (coin type batteries) have a really low rating for
maximum
> pulse current that they can handle.
> So, to get to the point, I was wondering if I could skirt this
> problem by putting a capacitor in series with the muscle wire. This
> way, a small battery which cannot handle a high current could take
> its time charging the capacitor. Then, to contract the muscle wire,
> I would just discharge the capacitor. The high current necessary to
> contract the muscle wire would come from the capacitor, not the
> battery (therefore a battery which cannot handle high currents
would
> not be harmed). Does this make any sense? Is my understanding of
how
> batteries work correct? Thanks for any help you could give!
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
(http://www.geocities.com/a_drunken_dwarf/stuff/backpack_diagram.GIF)
? Could you try to edit it in paint or some other program to show me
how to change it if possible? Thank you very very much!
--- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> Your idea of using a capacitor to increase short term current
capability
> from your battery is valid, however, you place the capacitor
across the
> battery and then discharge the capacitor through the muscle wire
when you
> wish to activate it not in series with the wire.
> jim
> http://www.geocities.com/jimforkin2003/
>
>
>
Original Message
> From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> Sent: Tuesday, November 11, 2003 8:24 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] capacitor/battery question
>
>
> hey,
>
> I'm using 'muscle wires' which require a rapid pulse of high
> amperage current to contract. I'm trying to use the smallest
battery
> that will be able to contract the wire. I'm currently using a
camera
> flash battery, which can handle pulse currents high enough to
> contact my muscle wire. The problem is that this flash battery is
> too large and heavy for my robot. Unfortunately, most other small
> batteries (coin type batteries) have a really low rating for
maximum
> pulse current that they can handle.
> So, to get to the point, I was wondering if I could skirt this
> problem by putting a capacitor in series with the muscle wire. This
> way, a small battery which cannot handle a high current could take
> its time charging the capacitor. Then, to contract the muscle wire,
> I would just discharge the capacitor. The high current necessary to
> contract the muscle wire would come from the capacitor, not the
> battery (therefore a battery which cannot handle high currents
would
> not be harmed). Does this make any sense? Is my understanding of
how
> batteries work correct? Thanks for any help you could give!
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/