[Blabber] Boosting the voltage from a lemon juice battery.

Matthew Duepner matthewduepner14 at gmail.com
Wed May 15 21:05:23 UTC 2013


I think so.  I will try to execute this when I get home.  Is there any
specific cap I should use?  I
On May 15, 2013 4:59 PM, "Guan Yang" <guan at yang.dk> wrote:

> Yes, capacitors don't tend to self discharge very fast.
>
> Do you understand the circuit? You have two caps, C1 and C2, and an
> endless sequence of lemon batteries, B1, B2, B3, etc.
>
> Connect B1 to C1 to charge it up.
>
> Now connect B2 in series with C1. The two in series have a higher voltage.
> Connect to C2 to charge that.
>
> Now connect B3 in series with C2 to top up the charge of C1. Etc.
>
> The only thing I can think of is a diode to prevent any charge from going
> back. My favorite solution for this these days is a P-channel MOSFET. You
> want the current to go from drain to source. Short the gate to ground to
> open up the MOSFET.
>
>
> On Wed, May 15, 2013 at 4:55 PM, Matthew Duepner <
> matthewduepner14 at gmail.com> wrote:
>
>> Would I need only two caps or are more components needed.  And would the
>> cap discharge slowly enough to be measured with a multimeter?
>> On May 15, 2013 4:40 PM, "Guan Yang" <guan at yang.dk> wrote:
>>
>>> You might actually need two caps to carry the charge "forward" in your
>>> scenario.
>>>
>>>
>>> On Wed, May 15, 2013 at 4:39 PM, Matthew Duepner <
>>> matthewduepner14 at gmail.com> wrote:
>>>
>>>> Could you use the lemons to charge a higher voltage cap, which when
>>>> discharged would output a greater voltage?
>>>> On May 15, 2013 4:26 PM, "Guan Yang" <guan at yang.dk> wrote:
>>>>
>>>>> Then I would just try tons of lemons in series. Maybe try different
>>>>> fruits to find the highest voltage per volume. Lime?
>>>>>
>>>>> On May 15, 2013, at 16:19, Matthew Duepner <matthewduepner14 at gmail.com>
>>>>> wrote:
>>>>>
>>>>> awesome.  I do want her daughter to understand and I also don't want
>>>>> it to look like I did the project for her.  So nothing to complex.  The
>>>>> fewer the components the better
>>>>> On May 15, 2013 4:15 PM, "Guan Yang" <guan at yang.dk> wrote:
>>>>>
>>>>>> Well if the goal is solely to generate a high voltage, there are
>>>>>> tricks. Special flyback transformers, I have a few. You could potentially
>>>>>> have hundreds of volts. (But again, very little current!)
>>>>>>
>>>>>>
>>>>>> On Wed, May 15, 2013 at 4:13 PM, Robert Diamond <rmd6502 at gmail.com>wrote:
>>>>>>
>>>>>>> Joule Thief - the more windings to the coil, the higher the voltage!
>>>>>>>
>>>>>>>
>>>>>>> On Wed, May 15, 2013 at 1:10 PM, Matthew Duepner <
>>>>>>> matthewduepner14 at gmail.com> wrote:
>>>>>>>
>>>>>>>> My chem teacher recently asked me if I would be able to help her
>>>>>>>> make something that is like a battery but not a battery.  I suggested super
>>>>>>>> caps of course, but later found out that it needs to be something her
>>>>>>>> daughter can make since it is part of one of her homework assignments.  I
>>>>>>>> suggested making a lemon juce battery.  I also said I would look into ways
>>>>>>>> of increasing the output voltage with electrical components since the goal
>>>>>>>> of the exercise is to see who can construct a battery that generates the
>>>>>>>> highest voltage.  I have a few ideas but was wondering if anyone had any
>>>>>>>> suggestions that would not be too complex.  Sorry for the long email, but I
>>>>>>>> thought the story was worth sharing.
>>>>>>>>     -Matthew
>>>>>>>>
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>>>>>>>
>>>>>>
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