Ideas Required Please! (Engineers, Hobbyists alike)!!! (2 Viewers)

[Speed6]

At school my science project qualified for a spot at this years Science Fair at UOW, my original project that won me this opportunity was a basic 'Homemade Battery' similar to something like this http://www.wikihow.com/Make-a-Homemade-Battery. The thing is that I want to make something better than measuring/reading the voltage with a mulitmeter and instead power something around ~9 volts like an LED flashing light and siren PCB for example. It still has to be around the subject of 'Homemade Battery', also can you recommend any other liquids besides soft drinks to produce a high voltage please and is buy able at shops?. I have a timeline, so time at this stage is critical to modify my original project and please any sensible ideas would be taken into my consideration and if it is really good and benefits my project in anyway your first name will be mentioned (at your consent) in the final presentation of this project at the University of Wollongong.

NB: I have access to and the use of a soldering iron, I do not know how to wire advanced PCB kits and so on... But I can get someone to help me though!

Thank you very much!

 

[seventhroot]

what exactly are you trying/wanting to do? (or is that what you're asking about lol)

if you want to increase voltage then just put a huge current in it with a transformer

 

[Queenroot]

 

[seventhroot]

is this chemical engineering?

square out

 

[Speed6]

what exactly are you trying/wanting to do? (or is that what you're asking about lol)

if you want to increase voltage then just put a huge current in it with a transformer

1. I am trying to make a homemade (cup) battery to be more specific, if you had a look at this my leader- http://www.wikihow.com/Make-a-Homemade-Battery... that can power ~9V (Equivalent) something like an LED and an ambulance siren or something.

2. Can you link me to a transformer suitable for this project?

 

[Speed6]

is this chemical engineering?

square out

Nah this is just a science project that I decided to make, plz come back ~ Kappa Master Race Leader ~ I need your help I'm serious!!!

 

[nerdasdasd]

1. I am trying to make a homemade (cup) battery to be more specific, if you had a look at this my leader- http://www.wikihow.com/Make-a-Homemade-Battery... that can power ~9V (Equivalent) something like an LED and an ambulance siren or something.

2. Can you link me to a transformer suitable for this project?

Borrow your school's one?

 

[Speed6]

Borrow your school's one?

Wait what? Schools have mini transformers?

 

[Technoash]

I think lemon juice would work. The common red LEDs are usually < 3 volts and very low current draw (around 25mA) but I think that even your juice battery will have problems powering this Is there something specific you trying to show with this display?

 

[seventhroot]

1. I am trying to make a homemade (cup) battery to be more specific, if you had a look at this my leader- http://www.wikihow.com/Make-a-Homemade-Battery... that can power ~9V (Equivalent) something like an LED and an ambulance siren or something.

2. Can you link me to a transformer suitable for this project?

1) I don't see how that makes a battery? from the photos on the link it looks like a circuit that has a cola medium in it

2) you can make one but it is very dangerous

 

[nerdasdasd]

Wait what? Schools have mini transformers?

yep, mine did

Maybe ask your science teachers?

 

[seventhroot]

Wait what? Schools have mini transformers?

yes our one did


it is basically 2 coils of wire one with more than the other and it follows the law I₁V₁ = I₂V₂

 

[Technoash]

1. I am trying to make a homemade (cup) battery to be more specific, if you had a look at this my leader- http://www.wikihow.com/Make-a-Homemade-Battery... that can power ~9V (Equivalent) something like an LED and an ambulance siren or something.

2. Can you link me to a transformer suitable for this project?

I don't think a transformer is suitable for this if your battery is outputting extremely low voltages. I think you should first build the battery and see how much voltage and current it can output. After that, you will be able to select an appropriate device to power.

 

[Speed6]

I don't think a transformer is suitable for this if your battery is outputting extremely low voltages. I think you should first build the battery and see how much voltage and current it can output. After that, you will be able to select an appropriate device to power.

What kind of 'cool device' should I be looking at?

 

[Speed6]

yep, mine did

Maybe ask your science teachers?

Ok ill ask

yes our one did


it is basically 2 coils of wire one with more than the other and it follows the law I₁V₁ = I₂V₂

I haven't used one before but they wouldn't be dangerous with low voltage?

 

[seventhroot]

Ok ill ask

I haven't used one before but they wouldn't be dangerous with low voltage?

if you handle it safely it shouldn't be a problem

 

[Speed6]

I think lemon juice would work. The common red LEDs are usually < 3 volts and very low current draw (around 25mA) but I think that even your juice battery will have problems powering this Is there something specific you trying to show with this display?

Yeah I am trying to show that it can power something basic such as an led light for an example but wouldn't that be boring?

 

[Technoash]

What kind of 'cool device' should I be looking at?

I dunno. Find out how much power you can get first.

This is a cheap 6V motor. Probably takes 100 - 300mA
http://www.dx.com/p/diy-model-toy-motor-size-m-229165#.VET2hPnLfYg

LED 2.2v probs 25mA
http://www.dx.com/p/3mm-f3-round-head-red-light-1000mcd-signal-indicator-leds-set-10-pcs-154868

 

[seventhroot]

if you want some LED's or a motor I have some/one respectively. meet at central

 

[Technoash]

This image implies that you will need multiple lemon/cup batteries in series to power a single LED