General > General Technical Chat
First IC you came in contact with?
atferrari:
Coming from a successful building of a 80-40 m Xmtr with valves / tubes, after being given a non-working board (full of CD4000 CMOS chips) imitating the Big Ben (?!), I ended buying some CD4017 immediately followed by some CD4001 IIRC. Analog multimeter to understand what high and lows were. Totally confused when I heard that they used a "clock" to work. :wtf:
My 1st micro programmed manually in Assembler, the Z80 inside a Timex Sinclair 2068. My first micro programed on a protoboard, an 8052 driving a 2x16 LCD. My first micro programmed soldered to something, a 16C57.
rx8pilot:
7400
1985 - 11 years old.
Sole supplier of parts and tools: Radio Shack
Sole supplier of information: Radio Shack and the public library.
N2IXK:
--- Quote from: smjcuk on May 14, 2015, 03:08:32 pm ---Pah. You can build a 7400 with a bunch of 741s but you can't build a 751 with a bunch of 7400s :)
--- End quote ---
Believe it or not, you can operate TTL logic with resistive feedback from the output to the input to bias a gate to act as an analog amplifier. Never tried it, but details are in the AoE(?).
Another chip I have fond memories of playing around with was the SN76477 analog synth-on-a-chip. Could make some pretty funky sounds with one of those. There was a later simplified version in a 16 pin package the SN94281.
smjcuk:
--- Quote from: N2IXK on May 14, 2015, 10:39:11 pm ---
--- Quote from: smjcuk on May 14, 2015, 03:08:32 pm ---Pah. You can build a 7400 with a bunch of 741s but you can't build a 751 with a bunch of 7400s :)
--- End quote ---
Believe it or not, you can operate TTL logic with resistive feedback from the output to the input to bias a gate to act as an analog amplifier. Never tried it, but details are in the AoE(?).
--- End quote ---
That's my weekend project sorted :)
JacquesBBB:
If I do not count computers, where I was not directly in contact with the IC, even if I could program the 6800 in assembly language, the first IC I directly came into contact is the
Atmega328, in an Arduino UNO, only a little bit more than two years ago.
I was surprised to see how simple it was to interface with this IC through the arduino IDE.
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