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# can I turn 2A into 5A? Answered

I am makinga hot wire foam cutter and using the hot wire foam calculator from Shawn James and it says that I need a supply of 7.5V 5A, but my transformer only gives 2 A. I've seen voltage multipliers and I don't know if there's a current multiplier. If so, please give me the instructions to make one.

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Voltage multipliers are able to up the voltage at the cost of amperage. Doesn't really work the other way around. If you want more current you gotta have a transformer that can offer that amount of current. Or take several transformers that offer the same voltage and current and wire then up in Parallel. So if you have 3 of those transformers you would have your 7.5V with up to 6A of available current.

A transformer can turn voltage into amperage. When you decrease volts going through a transformer you increase amps, also works backwards: increasing volts drops amps.

That said, you need a different transformer (supply), or a different wire here.

You've missed the point: you may well have enough power, all you need to do is change the hot wire.

I am making a hot wire foam cutter and using the hot wire foam calculator from Shawn James and it says that I need a supply of 7.5V 5A, but my transformer only gives 2 A.

How many volts do you have ? Shawn's supply can deliver 37.5 Watts to the wire, via a 1.5 Ohm hotwire ?