Re: TI-H: My TI92 Hardware Homepage : RTLink?
[Prev][Next][Index][Thread]
Re: TI-H: My TI92 Hardware Homepage : RTLink?
----- Original Message -----
From: David Knaack <dknaack@geocities.com>
To: <ti-hardware@lists.ticalc.org>
Sent: Thursday, February 04, 1999 6:48 PM
Subject: Re: TI-H: My TI92 Hardware Homepage : RTLink?
>
>From: Christian Auer <ca1@gmx.net>
>>My TI92 Hardware Homepage has been updated...
>>http://members.xoom.com/Ti92/index.html
>
>
>You mention on the radio link page that you don't understand some of the
>symbols used in the schematic, like which ones? He is using those little
>trapezoids for transistors and in one place he has a cap drawn with the
>gap filled with slanted lines. Not sure what that means.
havnt seen trapezoids for transistors, but in older schems i have seen caps
with the slanted lines. its just a normal cap
>
>I have three questions about this circuit. I'm no EE, my electronics skill
>doesn't extend much above the basics, so I may be totally off, but a couple
>of things looked a bit strange to me.
>
>First, and this is a big one, there is no indication that the separate
power
>supply for this thing has a common ground with the calculator. He
>explicitly
>mentions that the link's ground cable is not to be connected. That means
>that 5v on the red wire (relative to to the calc ground) isn't necessarily
>5v relative to the RTLink's ground.
>
>Second, the white wire is connected directly to battery negative ?? Doesn't
>that make it kind of hard to send half of the bits and ack the other half?
>I don't see how the RTLink can ack any bits received from the calc.
>
>Third, well, I forget what the third was, but last I knew there was no
>working
>radio link (other than perhaps Grants, but I haven't heard of anyone else
>who has successfully built that). Is this one of the hoax plans, or does
>this thing really work?
from what i remember of looking at it, you are looking at the origianl hoax
plans themselves, whcih i thought had been removed everyweher, but i guess
not.
Kaus
>DK
>
>