Electronics > Beginners
What is the purpose of this 3rd transistor ?
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Beamin:

--- Quote from: james_s on May 01, 2019, 11:33:16 pm ---
--- Quote from: Beamin on May 01, 2019, 06:36:55 pm ---You could build this using transistors right? Since I don't see any of those multiple gate transistor or other weird things they can do in IC's. There was a vacuum tube logic gate on mr carlsons lab I wonder if you could make this with tubes too?

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https://shop.evilmadscientist.com/productsmenu/762

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I was thinking about selling a whole series of such things but seems like someone already came up with it. It like good ideas; every time you think you have one, it turns out there is some obscure patent for it already and no one is capitalizing on it. If I was born 100 years sooner I would have more inventions then Edison.
james_s:
Don't be too sure about that, you have the advantage today of hindsight, and access to vast amounts of information at your fingertips. A lot of inventions that are obvious and easy today were not so obvious or easy in the time and place they were developed with the resources that were available.

Beamin:

--- Quote from: james_s on May 01, 2019, 11:50:44 pm ---Don't be too sure about that, you have the advantage today of hindsight, and access to vast amounts of information at your fingertips. A lot of inventions that are obvious and easy today were not so obvious or easy in the time and place they were developed with the resources that were available.

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I found a drawing of mine I made in the third grade: it was a schematic and diagram of a car. It showed drive by wire with the steering wheel hooked up to a bunch of resistors with the -/\/\/- symbol around a steering wheel to electric motors on the wheels. I remember drawing it. When I was in 3rd grade fly by wire wasn't even a thing.
Nusa:

--- Quote from: Beamin on May 03, 2019, 05:41:57 pm ---
--- Quote from: james_s on May 01, 2019, 11:50:44 pm ---Don't be too sure about that, you have the advantage today of hindsight, and access to vast amounts of information at your fingertips. A lot of inventions that are obvious and easy today were not so obvious or easy in the time and place they were developed with the resources that were available.

--- End quote ---


I found a drawing of mine I made in the third grade: it was a schematic and diagram of a car. It showed drive by wire with the steering wheel hooked up to a bunch of resistors with the -/\/\/- symbol around a steering wheel to electric motors on the wheels. I remember drawing it. When I was in 3rd grade fly by wire wasn't even a thing.

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Sure there was, unless you're older than I am. You just weren't personally aware of it. The Concorde, first flown in 1969, was fly-by-wire. Going further back, there's the LLRV&LLTV (lunar lander trainers) flown in 1964 and the Avro Canada CF-105 Arrow in 1958. Or if you want something still flying, there's the Airbus 320 in 1987 and the F-16 in 1974.
james_s:
In cars Saab did a complete drive by wire implementation in an experimental car in 1992, it was not one of their best ideas but it was electrical, using a motor to steer the wheels.

https://www.saabplanet.com/saab-9000-drive-by-wire-1992

This was after decades of experience with fly by wire in Saab aircraft. The concept is most certainly not new.
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