Week 7

Test the previous circuit that construct:

The circuit test:

The input voltage for the solar panel that we get and test:

We change the analog multimeter to digital multimeter since it more easy to read.And we can't continue the test since rainy day.

Week 6

Construct another circuit: solar charger circuit

For this circuit,the battery has be change to 12v 4.5 Ah and variable resistor to 100k ohm.

Week 5

Learn more about power supply


A power supply is a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy (e.g., mechanical, chemical, solar) to electrical energy. A regulated power supply is one that controls the output voltage or current to a specific value; the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply's energy source.

Every power supply must obtain the energy it supplies to its load, as well as any energy it consumes while performing that task, from an energy source. Depending on its design, a power supply may obtain energy from:

• Electrical energy transmission systems. Common examples of this include power supplies that convert AC line voltage to DC voltage.
• Energy storage devices such as batteries and fuel cells.
• Electromechanical systems such as generators and alternators.
• Solar power.

A power supply may be implemented as a discrete, stand-alone device or as an integral device that is hardwired to its load. Examples of the latter case include the low voltage DC power supplies that are part of desktop computers and consumer electronics devices.

Commonly specified power supply attributes include:

• The amount of voltage and current it can supply to its load.
• How stable its output voltage or current is under varying line and load conditions.
• How long it can supply energy without refueling or recharging (applies to power supplies that employ portable energy sources).

Week 4

Test the previous circuit:



This circuit  function well but we can't use this circuit because it can't recharge the battery.Beside this circuit is only to test our knowledge about the solar.

Week 3

Presentation for final year project


On 16th february 2011,presentation for final year project was held for let the student present about the progress of their final year project at Research Postgraduate Studies (RPS) Meeting Room, Level 6 .There are three lecture was invited to assess the student who present their final year project progress.The purpose of the presentation is to identify the FYP current status and most importantly to have some external inputs & ideas towards the project. Main area to be discussed is Project Ideas, Concept, Project Status, Results (if any..),and Planning.

Week 2

Test the solar circuit that got from internet

Test the circuit that I got from the internet.(http://electroschematics.com/6057/solar-birdhouse-light-circuit/). The circuit name is Solar Birdhouse.To understand how the solar circuit work,I constructing the simple solar Birdhouse.Below this is the picture circuit that I construct:

The circuit above using the battery 12V/4.5Ah to turn on it.But this time I not try the solar panel since I constructing the circuit at night.The problem that I got when testing the circuit is

a) The LED became dim when I put more the 4 LED.

b) The LED that I buying from the store not working well.

c) The multimeter broke

This is the BirdHouse circuit diagram:

Later I will testing the solar panel since it still night .

Week 1

Buy the component


Go to jalan pasar to buy component for solar circuit.

                                                             Solar circuit component receipt

These are some parts that I buy for test the solar circuit:

Specification of a typical 18V/5W solar panel:

Maximum Power (Pm) :5W

Working Voltage (Vmp):18V

Working Current (Imp) :0.28A

Open Circuit Voltage (Voc) :21.2V

                  

                12V/4.5Ah rechargeable battery