Re: TI-H: Hey everyone!

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Hey everyone!
From: gussie@alaska.net (Grant Stockly)
Date: Mon, 27 Apr 1998 20:31:39 -0700
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


There is no limit on the # of shift registers you can use...  Shift
registers are also bi-directionable...

>The last time I looked at the light flasher, it appeared that it might be
>possible to chain more chips for more ports! It would be interesting to be
>able to run more LEDs or a couple 7 segment displays.
>
>I know Mel Tsai's original design for the expander used a series of shift
>registers that both read and wrote data. Modify this and it might be possible
>to have 32 lines! Well, it's been a while since I saw it. Anyway, it's simple
>to build. basic logic. a simple counter. and it could be done to work
>bidirectionaly!
>
>That means you could have it read data from other devices. Otherwise, if
>you're lazy hardware wise, and are willing to make an I2C driver, then you
>could use the 8-bit I2C paralel interface chip. add a couple for more lines.
>--
>
>
>Richard Piotter
>richfile@prairie.lakes.com
>
>The Richfiles TI Hardware and BASIC web page:
>http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html