電壓與亮度比較實驗器

一體成型塑膠手提箱(設計可當本實驗板基座)。
　
尺寸：370×290×80mm。
　
電路面板採用白色高級塑膠板，精美印刷電路圖，裝有電池座6個、3.8V小燈泡及座3個、接線端子15個、電源開關3個。
 
分成三階段：第一階段1.5V
 
                    第二階段3V
 
                    第三階段4.5V

Consistes of 3 gradation: 1.5V; 3V; 4.5V. White plate printed cearly circuit  built with 6 battery holder, 3  switches, 15 connection terminals, 3  sets of replacement 3.8V light bulb with holder, mounted on a 370×290×80mm  plastic portable box as a basement, opperated in any place.