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making HP39GS Serial Cable (RS-232)
05-06-2019, 04:25 AM
Post: #5
SammysHP Offline
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RE: making HP39GS Serial Cable (RS-232)
RS-232 uses voltages between -15 V and +15 V and negative logic. What you know as "RS-232" or "serial connection" uses the same binary encoding, but inverted, positive logic and TTL levels (0 V to 5 V or 3.3 V). You should always include some kind of level converter or you might destroy your components.
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RE: making HP39GS Serial Cable (RS-232) - SammysHP - 05-06-2019 04:25 AM



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