Specifications

2.2.1 Solar Power input

The final device will utilize solar panels to harness energy from the sun and convert it to

useful electrical power. The solar panels used should be low cost and low maintenance,

while being as efficient as possible. In general, the lower cost panels output a lower

amount of power. For this reason, the cheapest panels cannot be automatically

selected, and instead price must be balanced with the power requirements of the

system as a whole. Since solar panels generally output a DC voltage, storage of the

energy created by them in a battery will be a straight forward process. Since the one of

the overall goals of the system as a whole is to be portable, size and weight of the

panels must be limited. Thus, the panels chosen must maximize power generated for its

size and weight when compared to other available panels. The solar panels will be

mounted to a tripod stand. The tripod stand will be the base of the power generators for

the entire system. The method for mounting the solar panels should be such that they

can be quickly and easily removed when the entire device needs to be relocated. This

also includes a quick and easy way to connect/disconnect any and all cabling that is

related to the panels.

2.2.2 Wind Power Input

The device will also harness energy from the wind via a wind turbine. The wind turbine

will convert the wind energy to electrical power, which will either be immediately used or

stored in a battery for later use. As with the solar panels, the wind turbine should be low

cost and low maintenance, while maintaining a high efficiency. Again, price must be

balances with the power requirements of the whole system. Some wind turbines output

a three phase AC power, while others have circuitry already included in their design to

output a DC voltage. This is because in most applications, the energy generated by the

turbine is not immediately consumed. It is instead, stored in a battery for use at a later

time. When it comes to wind turbines, there aren‟t a lot of options in the price range we

are looking for, but it is still important to keep size and weight in mind when making the

final selection for one to be used in this system. The turbine will be mounted to the top

of a tripod stand, which will also hold the solar panels. The method used to mount the

turbine to the tripod should be such that the turbine can be easily installed and removed

in the event the entire device needs to be relocated, and as with the solar panels, this

should also include an easy way to connect/disconnect all related cabling.

2.2.3 AC Power Output

The generator by specifications is designed to supply and AC power output in order to

power a laptop and a projector. The AC output is to be obtained from the DC battery

power supply with the use of a inverter in conjunction with a standard power strip to

provide outlets for the projector and laptop to tap into the power system.

2.2.4 DC Power Output

After the power is collected in the battery from the various generation sources the power

will be delivered to the loads in the form of a DC output. In order for that power to be

used by the loads it will later have to be transformed to an AC output by way of an

inverter.