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HP Forum Archive 21

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TI 82 socket
Message #1 Posted by Nick R on 22 Aug 2012, 1:03 p.m.

Does anyone know the purpose of the socket at the bottom end of the TI 82? I thought perhaps it was for attaching an external 6 volt DC supply but there's no mention of this in the manual.

      
Re: TI 82 socket
Message #2 Posted by Tim Wessman on 22 Aug 2012, 1:47 p.m.,
in response to message #1 by Nick R

Probably unit to unit communication.

TW

      
Re: TI 82 socket
Message #3 Posted by Manolo Sobrino on 22 Aug 2012, 3:14 p.m.,
in response to message #1 by Nick R

No, it's a standard 2.5 mm TRS connector (stereo audio jack) for Calc to Calc communication and Calc to PC via the TI connectivity kit , (see also this).

            
Re: TI 82 socket
Message #4 Posted by Nick R on 22 Aug 2012, 4:33 p.m.,
in response to message #3 by Manolo Sobrino

Thanks for the replies. I was about to feed in 6 volts and see if any smoke appeared.

                  
Re: TI 82 socket
Message #5 Posted by Luiz C. Vieira (Brazil) on 22 Aug 2012, 6:19 p.m.,
in response to message #4 by Nick R

Hi.

I guess it would not toast anything, but it is indeed a comms port. Keep in mind that most of the low-power, portable C-MOS gadgets do not have a DC outlet... Earlier LED-display calculators used to have it, either for battery charging (mostly) or external DC-operation, but their power consumption was somehow demanding.

Cheers.

Luiz (Brazil)

                        
Re: TI 82 socket
Message #6 Posted by Nick R on 22 Aug 2012, 11:37 p.m.,
in response to message #5 by Luiz C. Vieira (Brazil)

I suppose I was thinking back to when calculators needed regular recharging. As much as I like LED displays they did have disadvantages, particularly when you tried to read them outside in bright sunlight.

                              
Re: TI 82 socket
Message #7 Posted by Mike Morrow on 24 Aug 2012, 9:34 a.m.,
in response to message #6 by Nick R

That's one of the many great things about the HP 50g...it can run until doomsday on external power supplied through the USB port.

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