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# Electronics Project Report

Extracts from this document...

Introduction

Electronics Project Report

Plan:

These are the tasks and dates of my project;

• Introduction to project (1) 18th December
• Introduction to project (2) and issue of planning form 8th January.
• Plan project between 10th January & 7th February.
• Hand in planning form and order components 7th February.
• Practical work 18th February to 21st March
• Project photographed 21st March
• Report by 9th April

Timescale;

•  Design and research layout: 1 hour lesson.
•  Assembling & testing first sub-system: 2 hour lesson.
•  Assembling & testing subsequent sub-systems: 2 hours per sub-system.

Dates;

•  Completion and evaluation of complete circuit: 19th March
•  Completed report: 8th April

Specification:

Aim;

Middle

Complete description;
• The first part of the circuit, before the sub-system, is a simple switching device using a transistor.
• The sub-system compares the voltage from the next part of the circuit, to the first part of the circuit.
• The last part of the circuit monitors the output from the LDR.
• And the final part is the LDR and potentiometer (Light Dependent Resistor) whose resistance increase with light.

Testing the circuit;

I tested the resistance that I would receive from the LDR when it was totally dark (810Ω), and when it was light (50kΩ).

Conclusion

p>

LDR;

Light Intensity

Resistance 1 (Ω)

Resistance 2 (Ω)

Average Resistance (Ω)

## Dark

800

820

810

Dusk

22.7k

26.7k

24.2k

Light

49.6k

50.4k

50k

Capacitor

Attached, as appendix 1, is the graph of the discharge of a capacitor.

Evaluation;

My final circuit meets the specification because the LED stays on for 13 seconds when the LDR detects some one is at the door.

It is reliable.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

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