Texas Instruments Texet 1 calculator
This calculator was donated July 2011. Its the first calculator that TI produced and was a kit. The person who donated it worked for TI in 1973 and he constructed it. It contains one for the first micro controllers, TMS 0103NC (built week 22 in 1973) programmed to be one of the first single chip calculators.
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Front, showing simple 7 segment led display and keyboard next to the back showing battery compartment.
This shows the cable plugged in to supply power from a transformer.
This is the main card inside, showing the white battery holder.
This is the top of the insides.
This shows the main chip, under the keyboard.