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I'm playing with electroluminescent paint. I can make the paint go paramagnetic and change colors by changing my power source from 240v 50Hz to 240v 1400Hz. Is there a device out there I can make or use that will create an AC voltage of 240v at 0.2-0.3A and be able to change frequency that much?

I can't design circuits but I'm capable of building them. Any assistance would be great. Thanks in advance.

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  • \$\begingroup\$ in saying that, i can do it but from 2 different devices \$\endgroup\$
    – Nick Hart
    Commented Sep 5, 2015 at 14:38
  • \$\begingroup\$ im interested in variable frequency so i can "Tune the paint" \$\endgroup\$
    – Nick Hart
    Commented Sep 5, 2015 at 14:38
  • \$\begingroup\$ You are asking for a power amplifier that can provide 240V RMS or almost 700V peak-to-peak. With a current of 0.3 amps that is a power output of 72 watts (1200 watts for 5 amp output). This is not a trivial design and a potentially lethal device. You could buy an audio amplifier (fed from an audio oscillator) and use it to drive a step-up transformer but you will need to exercise great care in wiring to avoid electrocution. \$\endgroup\$
    – Barry
    Commented Sep 5, 2015 at 15:21
  • \$\begingroup\$ I believe a well selected Variable Frequency motor Drive with a big resistor as a partial load might fit the bill nicely. \$\endgroup\$
    – KalleMP
    Commented Sep 5, 2015 at 16:42

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You need a signal generator that feeds an audio power amplifier, followed by a step-up transformer.

Audio power amplifiers are generally designed to put out their maximum power into a 4Ω load (or less), so at 1200W, you'll be getting somewhat over 60 Vrms. In order to convert this to 240 Vrms, you'll need a 1:4 transformer. Make sure it can handle the frequency range (and power level) that you need.

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