DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1972||Display technology:||Fluorescent|
|New price:||Display size:||8|
|Size:||8.4" x 5.0" x 2.1"|
|Weight:||1 pound 12 ounces||Serial No:||F62224|
|Batteries:||Date of manufacture:||year 1972|
|AC-Adapter:||220V||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Joerg Woerner|
On a first glance the Toshiba BC-0802 looks like most other desktop calculators like the TI-3000, Canon L100S and the Heathkit IC-2008.
The keyboard with the [+=] key and the constant switch makes a design using the single-chip calculator technology introduced by Texas Instruments possible. A good reason to disassemble the robust machine !
|The Toshiba BC-0802 uses a green VFD (Vacuum Fluorescent Display).|
|The VFD is assembled with 8 single tubes, typical for Japanese desktop calculators.|
|Dismantling the BC-0802 is a simple job, the keyboard uses a connector to the main PCB (Printed Circuit Board). Each key uses a small magnet and a Reed contact. Made for a long life.|
|The main PCB consists of four areas: The VFD, the Driver electronics a power supply and the single-chip calculator circuit in the 28-pin housing.|
|A deeper look onto the TMS0112 gives a big surprise ! The chip was manufactured in Japan by Toshiba itself. Please notice the small J (Japan) in the TMS0112NCJ designation.|
The BC-0801B uses similar technics in a somewhat smaller housing, the later BC-0808B reduced weigh by more than 50%.
Don't miss the BC-1011 using more than 20 integrated circuits for similar specifications.
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© Joerg Woerner, May 18, 2002. No reprints without written permission.