Power supply calculater

[flathead]

In measuring the length and heigth of a part, I came up with LxH=11.86 (this is the total of the part) I divided 32 into this number to come up with 0.371amps. On the power supply calculater, I typed in 11.86 as my calculation and it said invalid, but gave me a number of .83amps. I cooked my part. Could someone please tell me if I am right by dividing my answer of my part into 32 to always get the amp total? And also why is it everytime I type a number into the power supply calculater it always says invalid, but gives me an amp total to use. Thanks, Jamie

[lcaswell]

Are you forgetting to calculate the surface area of both sides?

What shape is your part?

Are you referring to the "rectifier selection tool" on the web site? This is designed to help you choose a rectifier, not to select the correct power to use while plating.

Copy Chrome uses 0.07 amps/sq in. Some people also use 0.035 per square inch.

So your 12 sq in part would need 0.84 or 0.42 amps, depending on which method you use.