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

Matthew Duepner matthewduepner14 at gmail.com
Wed May 15 21:19:21 UTC 2013


How much constitutes as enough?
On May 15, 2013 5:16 PM, "Guan Yang" <guan at yang.dk> wrote:

> You need some kind of oscillator for that. And enough voltage to drive it.
>
>
> On Wed, May 15, 2013 at 5:15 PM, Ben S <ben.sugimori at gmail.com> wrote:
>
>> What about the "voltage multiplier" series of diodes that's in every DIY
>> "stun gun" schematic online? Would that be of any (safe) use here, or is it
>> all hooey?
>>
>> BenS
>>
>> On May 15, 2013, at 16:59, "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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