Same Wire, Different Currents - Need Help!

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Question Sending Different Currents, Same Wire - Need Help!
I am working on a current project and I need some help:

I have a attached a long piece wire to the back on a long piece of paper. I painted the piece of paper with thermochromic paint, which changes color when the wire heats up the paper when a current is run through it.

It is possible have different different current along the wire at the same moment in order to display different colors on the paper at the same time? I really don't know much about electricity and accessories, so if you could give me any suggestions, that would be great! I just don't want to have different wires for different colors.

Thank you for your time.

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Yes. Wear rubber gloves and wellington boots, or take up watercolour.

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@manueldsandoval,

Quote:

It is possible have different different current along the wire at the same moment

Do you mean current (Amperes) or voltage (Volts)? In either case the answer is "No". You will need a different wire for each colour.

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@manueldsandoval,

Perhaps you can say what is your source of power (power supply). If you're generating Direct Current (DC) or Alternating Current (AC), you'd have beein using different power supplies.

FYI, you cannot, to my knowledge, simultaneously run a/c and d/c on the exact same wire. The voltage source (transformer) is fussy that way.

Frankly, you need to understand what you're doing basically in this experiment and how your doing it. Then you need to learn how to express your question in a way someone else can understand what you're asking.

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@manueldsandoval,

Current in a wire is equivalent to water flowing in a pipe. You can't have two different currents. If you put two feeds in a pipe, they would just add together. I suggest you put a series of wires on your paper, each connected to a variable resistor. That way you can change the change the image by changing the settings on the resistors. Also note that you will likely need to use insulated wires which will slow the heat effect but prevent the wires from shorting through the paint.

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And remember because you are heating wires you can cause a fire. Be wary of the size of wire and the amount of current.

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@parados,

we all should realize that we may be talking to a bot.

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@manueldsandoval,

In order to have current flowing through a wire you must have load on it. A lightbulb will draw about 1 amp. Voltage will be present without a load being applied. Voltage alone will not build heat in the wire. To do this you need current. So use a 100 w light bulb and then a 60 watt and so on. There will only be one current value at any given time on one wire. The neutral also carries current. Good luck

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@Hatofftoya,

Hatofftoya wrote:

In order to have current flowing through a wire you must have load on it.

He is probably using some kind of resistance wire, in contact with the paper, as a load. For example you can get 0.3mm NiChrome wire with a resistance of 13.9Ω/m.

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@manueldsandoval,

I would think this could be done with a piece of resistance wire tapped at different lenghts

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Same Wire, Different Currents - Need Help!

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