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May 27th, 2017, 08:05 PM   #501
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Originally Posted by duragrip View Post
So servos are not a different, special, separate type of motor but rather refers to a different type, method of controlling motors?
The way of controlling the servo is just one way to categorize it or compare it with other motors yes. But there are other characteristics that could be compared.
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May 27th, 2017, 08:16 PM   #502
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So a servo is not really a type of motor (e.g. DC, AC, brush, brushless, induction).


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May 28th, 2017, 10:34 AM   #503
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I don't find the 555 timer very intuitive to use. It seems more like a black box. Why not just use Op Amps, transistors, and FETs which are all easier to use?


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May 29th, 2017, 11:24 PM   #504
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If you need the functionality provided by a 555, you could build it from other parts, but this would increase cost and space. This is why it exists.
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May 30th, 2017, 08:24 AM   #505
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You're a beautiful man.

What is the easiest way to make a Servo. I think I saw a YouTube video where they used a 555 timer to control a motor.

Is there even a simpler Servo circuit?


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May 31st, 2017, 12:38 AM   #506
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I'm not convinced the 555 was 'controlling' the motor, I'd need to see a circuit to be sure, most likely it was just changing the average voltage seen by the motor.
The simplest servo is an op-amp and 2 resistors (an inverting amplifier is a purely proportional servo) Note that 'servo' has nothing to do with motors, it is just often used to control them. I use a lot of PI servos, which just adds a capacitor to the circuit in the feedback, but there's usually a more complicated feedback path as I'm not just controlling the output voltage, it's usually a current in something or a big voltage somewhere.
Here's a voltage controlled current source:
Voltage-Controlled Current Source Circuit -
The load could be a motor
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