I need a cheap turbomolecular pump and controller for a project, however all the pumps I see on ebay do not come with a controller. Are there open source/DIY controller options out there? Most pumps are too small or busted to begin with.
What the FUCK do I do here

>>16709789 (OP)
Also I guess I could do a diffusion pump but I'm worried about contaminants + the oil is expensive

>>16709789 (OP)
Just buy the controller on eBay. There are plenty of cheap used controllers for the Turbo-V250

Why the fuck would you need that

>>16709789 (OP)
>turbopump
>cheap
Unless you need a ridiculously good vacuum you don't need a turbo or diffusion pump, or even a higher end rotary vane pump. For most DIY projects you can get away with a shitty little low end pump from like harbor freight or menards.

What's the project?

>>16709795
>>16709800
Sputtering

>>16709789 (OP)
Controller for brushless motor?

>>16709804
Oof, yeah that kind of needs the low pressure. Have you tried looking through university surplus sales?