Hello Mark, 120Vac by 4 Amps is about 480Watts. Since you need just for a few days fos a test, it is possible to use the follow sertup: Audio generator on 50Hz. connected to one power audio amplifier (P.A. system 500 Watts) where you coneccted one power transformer on the output of the amplifier to have your 120Vac in 50Hz. This kind of amplifier is easy to rent for a few dais and I think you can do this with a low cost. This is my idea, hope this can help you. Regards, Marcus ----- Original Message ----- From: "Mark Scoville" To: "Microcontroller discussion list - Public." Sent: Monday, July 06, 2009 12:09 PM Subject: [EE] Generating 120Vac 50Hz > Hi Piclisters, > > I have a project at work that I need to test while powered from 120Vac > 50Hz. > All I have available in the USA (Cleveland, Ohio) is 60Hz. Does anyone > have > any clever and inexpensive ideas for how to generate 120Vac 50Hz? I need > about 4 amps to do my testing. > > So far my thought is to buy a "Modified Sine" inverter ($100) that runs > off > 12Vdc and produces 220Vac at 50Hz. Then I could step down the 220Vac using > a > transformer (which we already have). It's not very elegant, and not ideal, > but this is only needed for a few days of testing and then will probably > sit > on a shelf for 20 years getting dusty. > > Anybody have any other ideas besides a really long extension cord to a > country that uses 50Hz. > > -- Mark > > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist