USB serial follies

John Larkin · 2013-01-22T01:45:29+00:00

I have a commercial usb-serial dongle that uses the Prolific chip. If I plug it into one USB connector on my PC, it comes up as COM4 and works. If I plug it into a different USB connector, XP tells me the driver is bad and has to be reinstalled. If I plug it into my USB hub, it shows up (in device manager) as COM D and says that something's wrong. Makes no sense to me. Any ideas? -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

Jan 22, 2013 21 Replies

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John Larkin 13 years ago

Or a Mini USB.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

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miso 13 years ago

I recall cases some time ago when women were found dead in their bathtubs. The tub was full of milk and a banana was...uh never mind. Anyway, it was the work of a cereal killer.

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