DATAMATH CALCULATOR MUSEUM
Texas Instruments Galaxy Junior
|Date of introduction:||1988||Display technology:||LCD|
|New price:||Display size:||8 (5 + 2)|
|Size:||3.5" x 6.0" x 0.65"|
|Weight:||4.0 ounces||Serial No:|
|Batteries:||2*LR44||Date of manufacture:||week 44 year 1988|
|AC-Adapter:||Origin of manufacture:||Italy|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(DE: 5.4M Bytes)|
With the Galaxy Junior Texas Instruments introduced a simple calculator performing fractional arithmetic. You can use two different modes:
• Euklid's division: 56 / 5 = 11 (Q) 1 (R)
With the SIMP and F-D-key you can shorten results and convert between fractional and decimal display:
• 3_35/70 SIMP 3_1/2 F-D 3.5
Compare the Galaxy Junior with the Galaxy 10, the only difference is one key !
The Galaxy Junior started with the well known housing of the TI-30 Galaxy.
Nevertheless it was a surprise to open two Galaxy Junior
calculators manufactured in the same year in Italy. The construction was
complete different! The first calculator (top on picture) uses a well known
flexible printed circuit board (Flex-PCB) connecting the single-chip
calculator-IC with the display and keyboard. Similar constructions could be
found with the TI-55 II or the later TI-65.
The second calculator (bottom on picture) demonstrated a different design using
a rigid PCB with a connector to the keyboard and connected to the display.
It looks simpler but seems to be more expensive - this one was the first design!
|Calculator IC found in the Galaxy Junior manufactured week 49 of the year 1987. The 1110484-0001 is the 7-digit Part Type identifier uses by Texas Instruments.|
|Calculator IC found in the Galaxy Junior manufactured week 10 of the year 1988. Please notice the changes in the ROM-Code (1110484-0002 revision).|
|Calculator IC found in the Galaxy Junior manufactured week 24 of the year 1988.|
|Calculator IC found in the Galaxy Junior manufactured week 44 of the year 1988 with the common CD4816 (TP0458) designation.|
The earlier of the two calculators uses a jumper to select between a "TI-10" and "TI-12", recently a Galaxy Junior replaced the "TI-12" with "TI Junior". Let's assume that the Galaxy Junior was designed as TI-12. In 1991 a well known TI-12 appeared, don't miss the Math Explorer.
The next calculator in line of the Galaxy Junior - the Galaxy 9x - uses the restyled housing of the Galaxy 67.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.