This work aims to achieve a functional system in terms of software and hardware to measure humidity with temperature and raining fall. Also, this system allows monitoring the date and time. We used Arduino Nano with the interfacing of the DHT22 sensor and a raindrop sensor placed in the local environment to measure the mentioned data. After designing the system that depends on the microcontroller Embedded on the Arduino board, we will display the data on a screen of the PC by the Arduino window (serial monitor) and display it on the LCD screen. This paper describes a simple portable design for humidity, temperature, and rain or no rain. The portable design can be made with a low cost of electronic components. It is efficiently and locally available so that it can be used to monitor weather conditions at any place. The test results showed that this system's component is small and can be packaged in a small plastic box. Besides, through the programming, we recorded the data on the Excel program, and at the same time. The data were recorded in a memory added to the manufactured system. The data obtained every five seconds are the (date, time, temperature, humidity, weather if rainy or not rainy). The system consists of two parts; the first part is inside the indoor, and it can be placed outdoor as needed and the second part is a rain sensor that can be placed outdoor. In case of rain, the buzzer and LED can be turned on to indicate the condition of rain.

The relationship between energy consumption and environmental pollution is evident from the exacerbation of widespread negative consequences such as climate change, including global warming, humidity, floods, earthquakes, destructive storms, and uncontrollable natural phenomena. Therefore, it is necessary to shift from fossil fuel consumption to alternative or renewable sources of energy such as solar and wind. Taking advantage of solar cell energy and investing in various fields such as electricity generation and agricultural uses such as water pumping, desalination and concentrating on their applications for the development of rural areas and their use in the development of the industrial sector. As well as encourage the private sector and capital owners to invest in solar cell energy. In our study, we analyze the best solar cell power stations in Iraq. Three cities selected across the country, providing data on distributions of solar energy and the density of electricity generated. Therefore, the research included a methodology suitable for the subject. This research aims to detect the importance of solar energy and how to exploit it through mathematical equations concerning the distributions and density to reach the possibility of the minimum solar energy utilization and then reach the preferred location for the construction of solar cell stations in the study area.

A series of inductor loads may not be the best design criterion for improvement in circuit performance. In this work, the best compromise so far for the trade-off in power consumption, input referred noise current spectral density, with wide bandwidth, high transimpedance gain and low DC supply voltage is reported. A simulated 65 nm CMOS feedforward transimpedance amplifier is introduced with a series of single PMOS loads instead of a series of inductor loads. A bandwidth of 20.16 GHz with a transimpedance gain of 51.16 dBΩ, an input referred noise current spectral density of 34.3 p A⁄√Hz, a power consumption of 1.052 mW and with a 1V DC supply voltage are presented. In addition, an active inductor load (instead of inductor load) is introduced within the 65 nm CMOS feedforward transimpedance amplifier. A bandwidth of 3.75 GHz with a transimpedance gain of 42.7 dBΩ, an input referred noise current spectral density of 21.4 p A⁄√Hz, a power consumption of 0.66 mW and with a 1V DC supply voltage are reported. This 65 nm CMOS feedforward design process provides enough voltage headrom for gate-to-source terminals in amplifying transistors due to less DC voltage drop across PMOS loads. As a result, this design process consumes the lowest possible power consumption especially with the single PMOS loads as well as with the active inductor load.