The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Arkira Sonthitham
Department of Teacher Training in Electrical, Faculty of Technical Education, King Mongkut’s University of Technology North Bangkok, Bangkok
Thailand

Chaiyapon Thongchaisuratkrul
Department of Teacher Training in Electrical, Faculty of Technical Education, King Mongkut’s University of Technology North Bangkok, Bangkok
Thailand