I have a project which requires some strange voltages. It is an LCD screen, and requires -22VDC, +5VDC and then 100VAC at 500Hz for the back light.
For this project, I decided I ought to make my own transformer. But I am not sure what type of transformer to build.
My power source being 120VAC (60Hz), I figured that the best way would be to use an auto-transformer set-up for the 100V, and use an isolated transformer (coupled with it) for the -22, and +5 VDC.
My question is whether or not I could use an auto-transformer set-up for the whole thing. I have been taught that an auto-transformer should only be used in slight step-up/step-down configurations.
could I use an auto-transformer for all the different voltages? Is there anything wrong with doing that?
For this project, I decided I ought to make my own transformer. But I am not sure what type of transformer to build.
My power source being 120VAC (60Hz), I figured that the best way would be to use an auto-transformer set-up for the 100V, and use an isolated transformer (coupled with it) for the -22, and +5 VDC.
My question is whether or not I could use an auto-transformer set-up for the whole thing. I have been taught that an auto-transformer should only be used in slight step-up/step-down configurations.
could I use an auto-transformer for all the different voltages? Is there anything wrong with doing that?