Analogue computers work by solving differential equations.
Electronic analogue computers use opamps to integrate, add, and multiply.
Mechanical analogue computers use cogs, wheels, motors, wires.And real programmers use water: https://en.wikipedia.org/wiki/Water_integrator
And real programmers use water: https://en.wikipedia.org/wiki/Water_integratorAnd real electronic engineers use gas for their logic circuits: https://www.symscape.com/blog/fluidic-logic
@tip.can19 - Binary and it's associated Boolean logic also fits our statefull view of the world; states such as yes-no, up-down, on-off, in-out, high-low, push-pull, mark-space, set-reset, left-right, true-false. Alternate states like whatever, dunno and Brexit, don't work when making decisions as they are not finite states.
Although, be careful, when you look at the analogue side of digital circuits they are very often tri-state. 1, 0 and floating. The later is sometimes a burden, but sometimes can be used to your advantage. You might have a chip which has a 0 or a 1 (high or low) on it's outputs, but when you pull the "chip enable" low they disconnect the the outputs which gives you a third state which you can pull high or low with a resistor for your purposes.
Not true.
...
I can't be bothered to point out the flaws in your other points.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Not true.
...
I can't be bothered to point out the flaws in your other points.
In binary logic the door has an exclusive true state for IsClosing or IsOpening and then, a true state for IsClosed or IsOpen. And only if HasFailed is false (not true). You might need to know the open angle, but that's not a state, it's a property.
Why binary not ternary.. I suppose one interesting reason is that all widely used number systems are even based, 2,8,10,16,60.
QuoteGlider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
As a paraglider pilot from a windy country, the bigger the span the more likely you'll be dragged like a rag doll up the hill Kite surfers tell me they have a 9m2 wing... mine is 29m2 and in a 15mph wind, in it's power zone will pull a family car.
QuoteGlider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
As a paraglider pilot from a windy country, the bigger the span the more likely you'll be dragged like a rag doll up the hill Kite surfers tell me they have a 9m2 wing... mine is 29m2 and in a 15mph wind, in it's power zone will pull a family car.
Yeah, but you can't go at 150kt, nor up to 37k ft (intentionally at least!), and there is the noticable possibility that the oversized handkerchief might collapse. Me biassed? Shurely shome mishtake.
(In the absence of hills, I was towed aloft under a 'chute behind a car on an airfield a couple of times, and have landed in a light aircraft 1/7 of the times I took off in one )
QuoteGlider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
As a paraglider pilot from a windy country, the bigger the span the more likely you'll be dragged like a rag doll up the hill Kite surfers tell me they have a 9m2 wing... mine is 29m2 and in a 15mph wind, in it's power zone will pull a family car.
Yeah, but you can't go at 150kt, nor up to 37k ft (intentionally at least!), and there is the noticable possibility that the oversized handkerchief might collapse. Me biassed? Shurely shome mishtake.
(In the absence of hills, I was towed aloft under a 'chute behind a car on an airfield a couple of times, and have landed in a light aircraft 1/7 of the times I took off in one )
LOL. Unfortunately paraglider pilots have found themselves up there before. Found unconscious, hypoxic and covered in hail storm bruises, but alive.
I suppose the only advantage I have is that I can carry my glider to the top of the hill and launch and don't need a trailer to get it out of a farmers field Who needs to go faster than 25knots anyway, it's much easier staying in small thermals when you can orbit inside 10 meters
3k4ft), at 10kt up, banking at 70degrees, pulling 3G for a minute or so until cloudbase. We kept an eye on the other glider at the same height by looking upwards at the top of his head That was a new experience for an instructor that had been instructing for half a century.
I was wondering if digital systems work in binary 0 and 1, why is it so? Why not have 0, 1 and 2 (or some other constant/variable to make it three) and let three numbers represent a digital system?
Is there a specific reason behind this? Just curious.
Thank you,
Although, be careful, when you look at the analogue side of digital circuits they are very often tri-state. 1, 0 and floating. The later is sometimes a burden, but sometimes can be used to your advantage. You might have a chip which has a 0 or a 1 (high or low) on it's outputs, but when you pull the "chip enable" low they disconnect the the outputs which gives you a third state which you can pull high or low with a resistor for your purposes.
All "digital" circuits are actually analogue; that's most obvious with ECL and derivatives. Some CMOS logic gates can be used as linear amplifiers.
Logic gates interpret input voltages/currents as digital signals. When those inputs are within defined limits, the gate's outputs will (eventually) be within limits that other gates can interpret as a digital signal.
The few digital circuits that you might encounter include photon counting devices and femtoamp circuits.
Why binary not ternary.. I suppose one interesting reason is that all widely used number systems are even based, 2,8,10,16,60.That's only after the invention of '0'.
Although, be careful, when you look at the analogue side of digital circuits they are very often tri-state. 1, 0 and floating. The later is sometimes a burden, but sometimes can be used to your advantage. You might have a chip which has a 0 or a 1 (high or low) on it's outputs, but when you pull the "chip enable" low they disconnect the the outputs which gives you a third state which you can pull high or low with a resistor for your purposes.
All "digital" circuits are actually analogue; that's most obvious with ECL and derivatives. Some CMOS logic gates can be used as linear amplifiers.
Logic gates interpret input voltages/currents as digital signals. When those inputs are within defined limits, the gate's outputs will (eventually) be within limits that other gates can interpret as a digital signal.
The few digital circuits that you might encounter include photon counting devices and femtoamp circuits.
Relay logic uses truly discrete binary signals
Or even worse, what if a relay starts chattering, or a contact starts arcing at a rate faster than subsequent coils can respond? How could those conditions possibly be expressed purely in relay logic states?
Everything is fundamentally analog, because the flow of charge and electromagnetic fields are continuous and not quantized (at least, not to any degree we care about, and even then, not in nearly the same way).
I'll add this just because it's a common retort -- shot noise proves the electric charge is quantized as electrons, but it doesn't mean charge or current is quantized in bulk. If I move a charged comb around sufficiently slowly, I will affect the field in its vicinity by less than an electron's worth of charge -- when charges are able to move freely, there is no shot noise (or not as much), and so it is perfectly meaningful to speak of continuum charge.