34s flashing cable possible candidate?
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06-27-2014, 03:01 AM
Post: #10
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RE: 34s flashing cable possible candidate?
The official standard for RS-232 requires voltage levels that go both above and below ground.
Some go as high as +- 10Volts. If the cable is designed to talk to serial port, it may generate these high positive and negative voltages. So just because the Atmel processor in the HP-30B is 5Volt tolerant does not mean that you can just attach anything to it. It would be prudent to at least measure the cable's output pins with a volt meter to be sure it does not generate high positive or negative voltages. |
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Messages In This Thread |
34s flashing cable possible candidate? - Tugdual - 06-23-2014, 11:25 PM
RE: 34s flashing cable possible candidate? - jebem - 06-24-2014, 08:08 AM
RE: 34s flashing cable possible candidate? - pito - 06-24-2014, 08:53 AM
RE: 34s flashing cable possible candidate? - cruff - 06-25-2014, 11:14 PM
RE: 34s flashing cable possible candidate? - Dave Frederickson - 06-25-2014, 11:40 PM
RE: 34s flashing cable possible candidate? - cruff - 06-26-2014, 11:35 PM
RE: 34s flashing cable possible candidate? - Dave Frederickson - 06-27-2014, 12:14 AM
RE: 34s flashing cable possible candidate? - Tugdual - 06-24-2014, 09:49 AM
RE: 34s flashing cable possible candidate? - pito - 06-24-2014, 12:59 PM
RE: 34s flashing cable possible candidate? - BarryMead - 06-27-2014 03:01 AM
RE: 34s flashing cable possible candidate? - Marcus von Cube - 06-27-2014, 06:51 AM
RE: 34s flashing cable possible candidate? - BarryMead - 06-27-2014, 07:26 AM
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