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NIDN : 0002027508. langit slot judi ID SINTA : 6034231. nona99 slot ID SCOPUS : 57190219046 ORCID : 0000-0002-2473-2826 GOOGLE SCHOLAR : Efri Sandi EMAIL : efri sandi@unj ac id Dr Efri Sandi MT is a lecturer in electronic engineering Graduated from Universitas Negeri Padang and continued his Master’s degree at Universitas Trisakti