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

Montree Siripruchyanun
<p>Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkuts University of Technology<br />North Bangkok, Bangkok, Thailand</p>
Thailand

Chairat Aupathamguagoon
<p>Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkuts University of Technology<br />North Bangkok, Bangkok, Thailand</p>
Thailand

Nitchamon Poonnoy
<p>Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkuts University of Technology<br />North Bangkok, Bangkok, Thailand</p>
Thailand

Kangwal Payakkakul
<p>Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkuts University of Technology<br />North Bangkok, Bangkok, Thailand</p>
Thailand