Design of Portable Phototherapy using PL-S UVB Lamp for Psoriasis Therapy

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Abstract

This research aims to design portable phototherapy using PL-S UVB lamp. The transformer DC power supply range used is step down transformer with 220 Volt primary input and 12 volt secondary output. The series of Driver Relay serves to control the mechanical relay in the on-off position, which corresponds to the changes received by the counting circuit, the circuit uses a BC 547A transistor and a 12V/5 pole DC relay and the diode used IN 4002/ IN4004. Resistance in this relay of 400 Ω. From the measurement results using digital multimeter obtained the voltage value in the IC LM7812 of 12.11 Volt and on IC LM7805 of 5.02 Volt. Ultraviolet radiation spectrum can penetrate the base layer of the dermis. Ultraviolet rays B can penetrate the base layer of epidermis skin.

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Hidayanti, F., Gunadi, S., & Syafaat, M. (2020). Design of Portable Phototherapy using PL-S UVB Lamp for Psoriasis Therapy. International Journal of Engineering and Advanced Technology, 9(4), 1206–1209. https://doi.org/10.35940/ijeat.d7412.049420

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