3 ms·
> Is it possible to “program” an analog computer as one does with a digital computer? Yes. You design a circuit; you're program is a diagram. Here is a simpl
by topspin 4y ago
> Is it possible to “program” an analog computer as one does with a digital computer?
Yes. You design a circuit; you're program is a diagram. Here is a simple one[1]. Believe it or not when you get good you can suss the basic function of such a thing pretty fast, much like a decent programmer can grasp the structure of code they've just encountered. There are a lot of idioms to learn, and you need to be able to approximate logarithmic functions in your head.
The 'op' part of op-amp (those big triangles) means 'operation,' as in mathematical operation. Their output is some mathematical function of their inputs (the + - terminals). That circuit multiplies two numbers and divides that product by a third number.
[1] https://electronics.stackexchange.com/questions/325472/how-does-this-analog-op-amp-multiplier-divider-work https://electronics.stackexchange.com/questions/325472/how-d...
- magicalhippo 4y agoIt should be noted that the op-amps don't perform the multiplication directly, they can only do scaled/weighted addition or subtraction. It should also be noted that this circuit can only operate on positive signals. A full four quadrant multiplier circuit, where both inputs can be positive or negative, is more complex AFAIK.