RANCANG BANGUN PENGATURAN INTENSITASSINARUV (ULTRAVIOLET) DENGAN MIKROKONTROLER PICUNTUKTANAMAN

YULIANTO, TRISATYA BAMBANG (2019) RANCANG BANGUN PENGATURAN INTENSITASSINARUV (ULTRAVIOLET) DENGAN MIKROKONTROLER PICUNTUKTANAMAN. Bachelor thesis, Universitas Muhammadiyah Purwokerto.

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Abstract

Ultraviolet is electromagnetic radiation to wavelengths shorter than areas with visible light, but longer than small X-rays. Ultraviolet radiation can be used to disinfect bacteria in the room and also in plants, but ultraviolet radiation can also have a negative impact on living things. Radiation caused by the sun is sometimes not constant, because not always the sun always shines on the earth, there are times when the sun is covered by clouds for a while or can be long. Therefore in this experiment the ultraviolet light will be used using UV light as the main source of ultraviolet light. Basically the value of the light intensity of the light is directly proportional to the value of ultraviolet light radiation. To adjust the value of the intensity of this lamp can be done by adjusting the PWM value of the lamp by changing the output voltage. From the results of experiments carried out, get a PWM value that is proportional to the radiation value that has been averaged on the sun. but it still has a difference between the radiation value of a UV lamp and the radiation value of the sun. This radiation value can change every hour according to the index data. To change the value every hour you can use Real Time Clock or RTC. This index data is taken from measurements of radiation values taken on the sun for 20 days each hour and the values are averaged. The results of testing on plants obtained the effect of ultraviolet light on the growth and development of tropical plants. The plant withers because of the high temperature produced by the UV lamp. The trial for monitoring the value of this radiation using the ML8511 sensor. However, this sensor is more accurate when used in outdoor or for taking radiation values to the sun. Because the sensor must be designed so that light can focus into the sensor. From this sensor data get a large error value at the time of measurement in the lamp and get a small error in the measurement in the sun.

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