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NeXT
January 30th, 2009, 01:45 PM
I was digging though a box of stuff I had and found two calculators. One is an SR-52 and has almost all of its documentation as well as the programming books and two or three little books filled with programmable mag strips.
The calculator itself however I'm having trouble with. I have no AC adapter for it and the rechargeable batter has long since died and gone to heaven (but not visually leaked). I put a 9V battery in its place and it did work for a while but it did not deliver enough power for me to read any of the mag strips. Exactly how many volts does the thing need from an AC adapter?

The other calculator is a T!-74 Basicalc. It too has all its documentation and even the old box and a dummy module installed but I have never really used it. I was able to whip up a little BASIC program for it but I really don't see much use for a single line BASIC computer. Also, how rare are the expansion peripherals and the RAM/ROM modules? I guess a cassette adapter or printer would be interesting.

Echoes
February 2nd, 2009, 05:26 AM
http://www.datamath.org/AC_List.htm

Here you can find a list of AC adapters with the ratings for voltage and current. And there is also a link to many battery packs.
Hope that's what you need!

curtis
February 2nd, 2009, 05:50 AM
Regarding the TI-74, this link might be useful: http://suddenlink.net/pages/curtismc/7495.htm

As far as peripherals, Tex*In Treasures, http://www.texintreasures.com/shop/
has stuff for the TI CC-40 which is a predecessor of the 74. These can be used if you build an adapter as shown on my web page.

The dockbus computers have a couple of peripherals that are worth their weight in gold, the PCIF and the CI-7.

The PC InterFace connects to a host computer's parallel port and allows you to use the host computer's hard drive for storage. You can also utilize the host's screen for the 74's display. It's not "live", but if you're debugging a program being able to see the whole program is a lot better than line by line. The PCIF is a bit finicky regarding faster computers, but if you have an older laptop, it makes for a pretty nice set up. These do show up on ebay rarely, and usually fetch a pretty hefty price. However, it's not too difficult to build one IF you're handy with a soldering iron.

The Cassette Interface is of obvious importance. These are a bit difficult to find, but can be found on ebay from time to time. The last one I saw went for $51.

Hope this helps.

Curtis

NeXT
February 2nd, 2009, 10:02 AM
Thanks you two.
I'll dig through my pile of power supplies and hope I find something that works.
as for the 74, well I guess I really don't see myself getting a pc interface at least any time soon.