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| First IC you came in contact with? |
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| daneck:
If they qualify as "ICs", then the Raytheon CK722 and the GE 2N107 transistors, used to build various radio receiver circuits. Then much later, got back into electronics and built a microcomputer using the MOS Technology 6502 and associated 6551 ACIA (serial) chip along with a blazing 1K bytes of static memory, all wire-wrapped. It had a real front panel with LEDs so you could see the machine language input bytes and the resulting output when running. |
| ciccio:
--- Quote from: Blofeld on May 14, 2015, 02:52:13 pm --- --- Quote from: ciccio on May 14, 2015, 02:28:00 pm ---It was in 1967 or 1968. A metal can op-amp (I believe it was a uA709, but I'm not sure, the UA741 came later), in the school lab. --- End quote --- Was this any sort of engineering school or a "normal" school? They never let us play with electronics in school. I have dim memories of handling an oscilloscope in class once. But I think we were just looking at the output of a signal generator, no memories of building any circuits there, I did all this at home. The school had, however, several Apple II, and we could not only use them in class but pretty much everytime in the afternoon as long as a teacher was in the building. --- End quote --- This was an ITI (Istituto Tecnico Industriale): a technical high school that has the first two years common to all students and the next three years with a very strict specialization. My school had: Mechanical Engineering, Thermotechnical Engineering, Radio Communications and (mine) Nuclear Energy. There was another school in the same city that had Industrial Chemistry and Industrial Electronics. They were good school, very formative and very selective (my class had 31 students at 3rd year and only 18 arrived at the diploma). People with ITI degree are the basis of all the industry of my province (Modena) which is the center of Italy's Motor Valley (Ferrari, Lamborghini, Maserati, Zonda Pagani, De Tomaso, Moto Morini, Ducati) and of the Sassuolo's ceramic tile district. The ITI diploma was equivalent to a lyceum diploma, giving access to the University. |
| Blofeld:
--- Quote from: Richard Crowley on May 14, 2015, 04:50:16 pm ---I remember as a very young lad playing with the very first widely-available transistor, the Raytheon CK-722 in a lurid blue plastic case --- End quote --- --- Quote from: daneck ---If they qualify as "ICs", then the Raytheon CK722 and the GE 2N107 transistors --- End quote --- I really wouldn't call them IC's, but doesn't matter, the CK722 is so far the component that has surprised me most in this thread. I'm (very roughly) aware of the history of the early (monolithic) Op Amps. But I had no clue that years earlier one humble transistor had whole books devoted to him like "Transistor Applications" from Raytheon - "More than 50 practical circuits using Raytheon CK722 transistors". That's quite amazing. So it was pure ignorance from my side, if I had known that people would remember their first transistor I would have called the thread "Your first semiconductor" or something. Or, even better, should have included tubes too. |
| deephaven:
In that case: First transistor - Red Spot First valve (tube) EF91 |
| PE1RKI:
my first was the zn415 which i blew up immediately. :palm: |
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