After the circuit is simulated on the software, and its PCB layout is made, the circuit layout is printed on a butter paper. Making the circuit on the PCB is comparatively a lengthy process. It is a board fully coated with copper on one side and fully insulating from the other side. Now let us move ahead and place the components on PCB. BC 548 TransistorĪs we have now simulated the circuit on software and it is working perfectly fine. When the base current is removed transistor is off and it goes in fully Cut-off region. When the transistor is biased it allows current to flow through it and that stage is called saturation region. This transistor can handle a maximum current of about 500mA hence it is not used in the type of circuit that has loads that operate on larger amperes. The range of gain value for this transistor is between 100-800. BuzzerīC 548 NPN Transistor: It is a general-purpose transistor that is used for two main purposes mostly (Switching and amplification). For ultrasonic applications, the operate well in the range of 1-5 kHz and up to 100 kHz. For example, they are used in digital quartz watches. These speakers or buzzers are comparatively easy to use and have a wide range of applications. Then the resonators or the diaphragms are used to convert this motion into an audible sound signal. A voltage is applied to the piezoelectric material to produce an initial mechanical motion. 555 Timer ICīuzzer: A Buzzer is an audio signaling device or a loudspeaker in which a piezoelectric effect is used to produce sound. The IC will generate a frequency when a high square pulse is applied to the RESET pin. by varying the values of capacitors and resistors that are used in the circuit. The frequency of the circuit can be adjusted by tuning the circuit. In this mode, the IC acts as an oscillator that generates a square pulse. In this project, we will use it as an Astable multivibrator. Astable multivibrator, monostable multivibrator, and bistable multivibrator. There are three main configurations of the 555 timer IC. I have made this sensor at home and attached the picture below: Raindrop Sensor Designed At Homeĥ55 Timer IC: This IC has a variety of applications like providing time delays, as an oscillator, etc. The diameter of the pulses should be approximately 3 cm and the same pattern can be made as shown in the above picture. Those who don’t want to purchase this sensor can make it at home by making a pulse train pattern with the help of a sharp thing like a knife. This sensor can also be made at home if we have the PCB board. When the conduction is reduced the electric component that is connected to the sensor is triggered and it’s state changes. As soon as the rainwater starts to fall onto the sensor the conduction path is made and the resistance between wires is reduced. When there is no rain the resistance on the sensor will be very high because there is no conduction between the wires in the sensor. Raindrop Sensor: The raindrop sensor module detects rainfall. Let us move a step further and go through a brief study of all the main hardware components. Now as we have made a list of all the components that we are going to use in this project. We will make this circuit on a PCB board and then place it at a suitable place so that whenever rain starts we can be notified by the alarm. Now, as we have the basic idea of our project, let’s move towards collecting the components, designing the circuit on software for testing and then finally assembling it on hardware. Rain Alarm Circuit How To Integrate Basic Electrical Components For Designing Rainsensor Circuit? The circuit is not very complex and can be prepared by anyone who has some basic knowledge regarding electrical components like resistors, capacitors, and transistors. The rainwater detector circuit will detect the rainwater and generate an alert for the people nearby so that they could take immediate action. In this project, we will create a rain alarm so that when the rain starts we could do some actions to save water as we could provide that water to plants, we could make some hardware to send that water in the Overhead tank, etc. Saving water in the responsibility of each an every citizen and if we will not pay attention to preserve this basic necessity of life we will suffer badly shortly. When these changes occur the temperature is raised dramatically and it could result in heavy rainfall, floods, etc. The world is suffering from unexpected climate changes and these changes are caused by various activities practiced by mankind.
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