Hello,
I have never built a control system from scratch before so I need some assistance in determining what kind of hardware I need to use. I have three instruments, which use combinations of BNC and RS232 serial for data output, and use RS232 serial for inputting commands to the instruments. I am building a system that monitors the outputs and sends inputs. Now, I am on a very limited budget. What kind of hardware do I need? I've looked through the National Instruments website but I'm still confused.
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