USB to RS232 Adaptor

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#1
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Hello there. I have an USB to RS232 adapter and I want to know what voltages does an adapter use? Does it use 0V and 5V ? If yes then I don't need a max232 anymore, right?

Nicu reSpawn.

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??????

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I suppose that would depend on the particular USB to RS-232 adapter you are using and what serial lines are available from it. What side are you talking about, the USB side or the RS-232 side?

If it really IS an RS-232 output that you are trying to read, then yes you will need some sort of RS-232 level to logic level converter, such as a MAX232.

Read the datasheet on your converter.

Stu

Engineering seems to boil down to: Cheap. Fast. Good. Choose two. Sometimes choose only one.

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It doesn't have a datasheet, it's a no name manufacter, but okay, I will keep using my MAX232 level converter...

Nicu reSpawn.

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why don't you measure it with a multimeter?