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Help circuit for project idea.

conrad141

May 7, 2012
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So I'm working on a project and I have only a little background in electronics. Here is the main idea:
  • Two AA batteries are wired in such a way that the output is approximately 1.4v and 16amps.
  • A variable resistor allows the output to be adjusted from nearly 0 to around the above output.
  • Something allows the device to be adjusted to accommodate different kinds of AA batteries (1.2v v.s.1.5v v.s. 3v)
  • This is all fairly small and will not produce too much heat.

I'm especially stuck on how to make the device be able to accept different kinds of AA batteries, would I simply use resistors attached to an adjustable switch.


Thanks for helping out a noob, I hope I explained everything well.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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16 amps -- Seriously?
 

War_Spigot

Feb 20, 2012
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I agree with Steve, drawing 16 amps you're probably going to have a lot of heat, and even with super high capacity AA's, you'll get maybe 20 minutes at most.
How are you setting the output voltage?
 

davenn

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I agree with Steve, drawing 16 amps you're probably going to have a lot of heat, and even with super high capacity AA's, you'll get maybe 20 minutes at most.
How are you setting the output voltage?

ummmm really ?

you are not even going to get 16 Amps out of a couple of AA batteries


conrad141
welcome to the forums :)

its not going to happen mate AA batteries cant supply that amount of current.
With two batteries in parallel you may get ~ 1.5A for a short time

D
 
Last edited:

conrad141

May 7, 2012
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I agree with Steve, drawing 16 amps you're probably going to have a lot of heat, and even with super high capacity AA's, you'll get maybe 20 minutes at most.
How are you setting the output voltage?

16 amps -- Seriously?

ummmm really ?

you are not even going to get 16 Amps out of a couple of AA batteries


conrad141
welcome to the forums :)

its not going to happen mate AA batteries cant supply that amount of current.
With two batteries in parallel you may get ~ 1.5A for a short time

D


The project is a external battery for a device that usually gets around 14-15 amps from a single AA battery. Yes, it doesn't last long, that's why I want it to be able to accommodate NiMH (1.2v) and also stock batteries (1.5)
 

War_Spigot

Feb 20, 2012
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14-15 Amps from a single AA? How? I just hooked a fresh one up directly to my multimeter and only peaked at around 5.5. It stayed at ~5.2 for ~10 seconds and then dropped quickly after that. Assuming you can get that much current, though, what kind of device is it and how do you plan on varying the voltage? When you say "variable resistor," I'm assuming a voltage divider, is that correct?
 

timothy48342

Nov 28, 2011
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The project is a external battery for a device that usually gets around 14-15 amps from a single AA battery. Yes, it doesn't last long, that's why I want it to be able to accommodate NiMH (1.2v) and also stock batteries (1.5)

Whatm is the device? What device "usually gets around 14-15 amps from a single AA?"
--tim
 

conrad141

May 7, 2012
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Whatm is the device? What device "usually gets around 14-15 amps from a single AA?"
--tim

The Magic Flight Launch box. It basically shorts out a battery and uses it to heat up a simple heating element (mesh screen).
 

(*steve*)

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You might get it from a NiCad...
 

BobK

Jan 5, 2010
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WTF? Is this some kind of drug paraphenalia?

Bob
 

donkey

Feb 26, 2011
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its labelled as a "vaporiser" but all the links i click on say people who bought that als bought a "herb grinder"
 

jackorocko

Apr 4, 2010
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a vaporiser is what medical marijuana users use to release the THC from the weed and not burn the other material. It heats up only to a given temp, like 150 degrees or something. So yeah, it is drug para, not that it matters.
 

BobK

Jan 5, 2010
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a vaporiser is what medical marijuana users use to release the THC from the weed and not burn the other material. It heats up only to a given temp, like 150 degrees or something. So yeah, it is drug para, not that it matters.
Okay, makes more sense now.

Bob
 
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