Salma Ahmed
English Lit. GCSE Student
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The aim of this investigation is to design, build and test a sensor.
- Words:
- 2291
- Submitted:
- Tue Sep 02 2003
Have a little read: ... Sensors Coursework Aim and Hypothesis The aim of this investigation is to design, build and test a sensor, which has an appropriate: * Sensitivity * Response time * Resolution * Range * Minimum random/systematic error The sensor I have designed operates by detecting the intensity of light using an LDR (light Dependant Resistor), also known as a photoconductor, in a Potential Divider circuit. In this experiment my input variable will be the mass of milk powder added to 750ml of water. My outcome variable will be the potential difference across the normal resistor (which changes as the resistance varies). I will be measuring this using a multi-meter of resolution 0.01V. This will be positioned as shown in the circuit diagram below. Background A potential divider is a resistor or a chain of resistors connected in series in an electrical circuit. It is used to obtain a known fraction of the total voltage across the whole resistor or
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