Long Duration Timer

Question 2 : Long Duration Timer



Problem Statement :


Nowadays, power saving is a hot issue in the elecrical and electronics field. The problem now is how can we save power? Can we set the devices to turn off automatically after certain period of time? Due to the electrical and electronics technology development today, we can make it. By constructing a long duration timer circuit, we can switch OFF a particular device after certain period of time. This circuit can be used to switch OFF devices like radio, TV, fan, pump etc after a preset time. Such a circuit can surely save a lot of power.



Circuit Design :







Progression :


We get the components that we need in order to construct the long duration timer circuit from JKEES 2nd Year Lab. We planned and arrange a schedule for us to complete this challenging mini project. We have study the long duration timer circuit given and find some relevant information. Then, we come out with the problem statement/objectives of this mini project.

Working Schedule planned :
30th September 2009
- Study on the question given, a long duration timer.
- Identify the main objective of this project.
1st October 2009
- Study on the components used to construct the circuit. For example, 556 timer and 7493 IC.
- Simulate he circuit using Circuit Maker 2000.
2nd October 2009
- Construct the circuit in JKEES Second Year Lab.
- Compare the result obtain with the simuation result. If the results are same, then can start the soldering work. Otherwise, identify the problem occured and try to do correction on the circuit.
3rd October 2009
- Prepare presentation slides and report for project.
4th October 2009
- Prepare presentation slides and report for project.
5th October 2009
- Construct the circuit in lab. (If haven't obtain results which similar with the simulation result)
- Prepare presentatin slides and report for project.
6th October 2009
- Construct the circuit in lab. (If haven't obtain results which similar with the simulation result)
- Prepare presentation slides and report for project.
7th October 2009
- Construct the circuit in lab. (If haven't obtain results which similar with the simulation result)
- Prepare presentation slides and report for project.
8th October 2009
- Project presentation.
9th October 2009
- Submit report of KL2092 Mini Project - Long Duration Timer.


Webpages Visited:
http://en.wikipedia.org/wiki/Electronics


http://electronicseveryday.blogspot.com/2009/08/long-duration-timer-circuit.html


http://www.circuitstoday.com/long-duration-timer-circuit


http://www.saburchill.com/tech/electronics/elect032.html