**4.3 Photo sensitivity of light**

Photo sensitivity (PS) is ratio of radiant energy expressed in watt(W) incident on the device, to the resulting photo current expressed in amperes(A) it may be represented as either an absolute sensitivity(A\W) or as relative sensitivity normalized, usually expressed in percentage (%), PS should be more than 5%,**Table 3** shows the PS of light from electrical power and from solar power, PS was calculated for both, the PS of them in acceptance percentage.

When solar power was used; PS of it = 8.3% it's > 5%, so, it is in range of acceptance and then the doctors could see with this light without any effective to their eyes.

#### **Figure 10.** *DC way.*


**451**

*Application of Solar Energy in Medical Instruments (Microscope)*

**Tool The cost(SDG)** Panels (50 W) 600 Charge control (10A) 300 Batteries (12 V,65 Ah) 750 Inverter (300 W) 450 Wiring 50 ∑equipment 2150

The cost of inverter way is 2150 SD pounds and it can work for 25 years without any additional cost. But DC way is cheaper and cost 1700 SD pounds without any

The annual cost of the electric power grid is calculated for a period of 25 years

The electricity power is the cheaper than PV system; but the solar energy can be used in rural areas where there is no electricity power and offer medical services to

1.Solar PV system can be alternative technology for remote rural areas where grid electric power **is not** available. Grid electric power is more cost effective power supply than Solar system. But this system can be alternative for some of

2.Then and finally as if the microscope was modulated and operated with solar energy, we recommend that to operate small healthcare units in rural areas.

The microscope illuminated by solar cell. Some medical devices operated by using solar energy, which this energy produces a DC current. These devices modulated by canceling step down transformer and rectifier, and offered appropriate DC current by sizing photovoltaic cell and a charging battery or used inverter to convert DC current to AC current. Solar cell is more expensive than electricity power, but it

In comparison to other energy sources such as coal, natural gas, nuclear, wind, and hydro-electric, solar energy is one of the least cost effective. For the most part, the exorbitant cost of solar energy is due to the high cost of manufacturing high quality solar panel material that has high energy conversion efficiency. Today, most cheaply made solar cells have an energy efficiency of about 14% while the higher quality materials achieve efficiencies of about 20–25% solar energy is still relatively

can use in areas where there are no electricity power.

additional cost. **Table 4** shows calculated the cost of solar system.

Total power (Wh)\*0.76 SDP/kW\*365.25 day \*25 years = 833 SDP

*DOI: http://dx.doi.org/10.5772/intechopen.97177*

**4.4 Economic results**

*The cost of solar system.*

**Table 4.**

by Sudanese pound (SDP).

fulfill the project's objective.

**5. Recommendations**

medical devises.

expensive to a consumer.

**6. Conclusions**

The cost of electricity power =

#### **Table 3.**

*PS of electrical and solar energy.*

*Application of Solar Energy in Medical Instruments (Microscope) DOI: http://dx.doi.org/10.5772/intechopen.97177*


#### **Table 4.**

*Solar Cells - Theory, Materials and Recent Advances*

**4.2 Solar was tested with solar (DC way)**

problem which mentioned previously.

the PS of them in acceptance percentage.

**4.3 Photo sensitivity of light**

their eyes.

light should be measure to avoid eyes' damage.

After the circuit was modulated in order to work with solar current, it should be tested using solar to perform project, **Figure 10** come next shows the result of

The circuit was operated with DC of solar, finally after that the sensitivity of this

Photo sensitivity (PS) is ratio of radiant energy expressed in watt(W) incident on the device, to the resulting photo current expressed in amperes(A) it may be represented as either an absolute sensitivity(A\W) or as relative sensitivity normalized, usually expressed in percentage (%), PS should be more than 5%,**Table 3** shows the PS of light from electrical power and from solar power, PS was calculated for both,

When solar power was used; PS of it = 8.3% it's > 5%, so, it is in range of acceptance and then the doctors could see with this light without any effective to

> **Solar energy Electrical supply DC AC DC AC**

Ampere 1.6 3.3 1.6 3.4 Voltage 12 6 11.9 5.8 Photosensitivity 0.083 0.167 0.084 0.172

**450**

**Table 3.**

**Figure 10.** *DC way.*

*PS of electrical and solar energy.*

*The cost of solar system.*
