Capacitor

Owen Truesdell's picture

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Joined: Jan 04, 2021

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Capacitor
January 4, 2021 - 4:40am

Owen Truesdell

Vaudreuil, Quebec, Canada

o.truesdell@sympatico.ca

 

Hi

I have a electronic problem that I hope you can help me with.

My wife and I love gardening but we can no longer be on our knees because of our health and age so I built a number of large above ground flower boxes on our back deck. What I want to do is to discourage the squirrels and racoons from damaging the flowers and vegetables we want to grow.

I recently disassembled a flash camera and got a really good shock when I touched the capacitor that operates the flash so I thought it would be a good idea to run two small wires from a capacitor around the flower box. As the animals touch both wires they would get get a good shock and hopefully they would go away and the capacitor would recharge (as in the camera) waiting to zap the next animal that tries to get in.

Unfortunately I only removed the capacitor and the AA battery holder from the camera and discarded the rest. I think I need other components such as a transformer and. or a transistor or something else which is why I am contacting you.

I have a battery holder that holds two 1.5v AA batteries and a 450V 100uF 5094 (M) capacitor. What I need to know is what other components do I need to buy and how do I wire them.

Any information would be appreciated.

If possible please respond by my email.

Regards Owen

 

Sourav Gupta's picture

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Joined: Feb 12, 2018

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You need a reliable circuit called as charge pump. Please use a dedicated charge pump controller for example LT3751. You can also purchase readymade board.

Owen Truesdell's picture

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Joined: Jan 04, 2021

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Hi Soura--Thank you for responding to my inquirery. The only LT3751 circuit board I found was on ebay and it had about fifty contacts with no directions on input or output.  I am very limited in my electronic  knowledge. I am looking for a very simple way to charge a 450V 100uF 5094 (M) capacitor. with a three volt AA battery power supply. I would like to connect the two wirws from the battery pack to ( ????? ) and then connect the (?????) to the two contacts of the capacator to charge it. Is there a simple (?????) that I can use? --Regards  Owen

 

 

Sharon Truesdell's picture

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Hi Michel-- Thank you for your reply. I think I can get my project working with this information. Thanks again--Regards Owen.

Michal Podmanický's picture

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Joined: Nov 06, 2020

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Use a one transistor joule thief circuit (boost converter another words). The transformer must have a 3 windings, the ratio between primary and secondary must be about 1:125.

 

Look something similar to this:

https://www.instructables.com/Make-a-SUPER-Joule-Thief-Light/

Michal Podmanický's picture

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Joined: Nov 06, 2020

Replies: 64

Use a one transistor joule thief circuit (boost converter another words). The transformer must have a 3 windings, the ratio between primary and secondary must be about 1:125.

 

Look something similar to this:

FZ8PDFOHNXRPMR8.png

 

Olivia Williams's picture

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Joined: Feb 27, 2020

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A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance.

Olivia Williams's picture

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Joined: Feb 27, 2020

Replies: 55

A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance

Sourav Gupta's picture

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Joined: Feb 12, 2018

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Hello Michal Podmanický,

That is a great circuit level advice. I am also interested in that circuit, could you confirm the transformer winding calculations for different voltage levels?

Olivia Williams's picture

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Joined: Feb 27, 2020

Replies: 55

A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance.