Many manufacturing processes are under computer control.
eg. SENSORS can detect the temperature or composition of something that is being manufactured.They collect analogue data, but a computer needs digital data.
For use a computer the sognals have to pass through an analogue-to-digotal conventer.
The data is the fed into a computer system. The software checks the values against what they should be. Signals are then sent to actuators such as motors, heaters or relays to keep the values within limits.
This constant feeding back of sensor data and carrying out actions is called a feedback loop. A good example of this is in the control of the temperature in a greenhouse.
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