Subsystem: P6 |
Task
Title:
Moisture Detecting |
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Op
Amp Comparator
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Introduction and Aims By using an Op Amp Comparator (P6) and a Potential Divider (IP1), we will make a system that can detect if water or moisture is present. We will see that the process module P6 produces a very distinct On/Off signal to control the output device. This is useful in digital (logic) systems as they only recognise logic 1's and logic 0's. Subsystem Circuit and Block Diagram
Modelling the System/Circuit There are different ways to model and test circuits before components are soldered to a P.C.B.. Modelling is an important stage as it helps you spot any problems and make modifications more easily. Method 1: Breadboard Using this method, components are pushed into the interconnected holes as shown in the diagram below. The lines shown, indicate which holes are internally connected. Method 2: Computer Simulation To begin, ask your supervisor if circuit simulation software is available on your PC. This method allows you to build up your circuits quickly and cheaply in a virtual environment but will not give you hands-on experience of the components you will be using when finally soldering your P.C.B.. Method 3: Using OnTrack modelling hardware
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