/diy/ - Do It Yourself

Anonymous Fri May 24 22:24:04 2019 No.1616846 [View]
File: 179 KB, 1028x708, RS-232.png [View same] [iqdb] [saucenao] [google]

My scope has an RS-232 serial port on the back of it. Looking at the RS-232 standard, a low signal is 3-15V below the 0V rail, and a high signal is 3-15V above the 0V rail. If I want to interpret this with a micro, I'll need to convert this into a standard TTL level. I'm pretty sure a standard logic level shifter won't work since it requires a common 0V for a logical low. Do I just use optocouplers? It will only be 4 or so.

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/diy/ - Do It Yourself

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