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Additional Pictures 

 

The PCB (side A) of the TI-2500 V1 :

TMS0119 Calculator Circuit

2 +2 Display Drivers

2 LED modules  

(ID: A001204, Italy)

The bottom shell of the TI-2500 V1:

 

 


The PCB (side A) of the TI-2500 V2:

TMS0119 Calculator Circuit

2 +2 Display Drivers

2 LED modules  

(ID: 2500 378664, USA)

 
The PCB (side A) of the TI-2500 V3:


(ID: 2500 024221, USA)

The PCB (side B) of the TI-2500 V3:

TMS0119 Calculator Circuit

2 +2 Display Drivers

9 LED modules  
The PCB (side A) of the early TI-2510:

PCB Designation 30614E


 (ID: 2510 065153, USA)

The PCB (side B) of the early TI-2510:

TMS0119 Calculator Circuit

SN27720 Power Supply

9 LED modules 

Mystery holes
The PCB (side B) of a rare TI-2500B
prototype testing the Bowmar 
Opto-stick display in a TI-2500 V3. 



 (ID: none, wk 42 year 1973)

 

The PCB (side B) of the TI-2500B:

TMS0119 Calculator Circuit

Bowmar Opto-stick

9 LED modules  

(ID: 2500B487035, USA)

The PCB (side A) of the TI-2500 II:

 (ID: 2500-II-276954, wk 33 year 1975)

 

The PCB (side B) of the TI-2500 II:

TMS0803 Calculator Circuit

1 Display Driver

1 LED stick  


If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, September 20, 2003. No reprints without written permission.