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

Nattapong Intarawiset
Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkut’s University of<br />Technology North Bangkok, Bangkok
Thailand

Somsak Akatimagool
<p>Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkut’s University of<br />Technology North Bangkok, Bangkok</p>
Thailand