几款简易电子测光表的设计  

Design of several simple electronic light meter

作　　者：崔建国 宁永香 Cui-jianguo;Ning-yongxiang(Shanxi engineering and Technology College,Yangquan 045000,ShanXi（lain)

机构地区：[1]山西工程技术学院

出　　处：《电子世界》2018年第19期152-152,154,共2页Electronics World

摘　　要：引言：摄影爱好者所用的名牌测光表都很昂贵,价廉的测光表往往不太好用,可以利用手头常见的元器件自制几款简易电子测光表,利用硅光电池作为感光器件、小型电流表（模拟、数字皆可）作为指示器件,为了提高灵敏度,可以在简易的电子测光表电路中加一级晶体管放大器,将自制测光表与专用测光表比较,按标准将自制测光表测得光圈、速度的数值分别标在自制测光表的电位器度盘和电流表度盘上。The famous brand light meter used by file photographers is very expen- sive, and file low price meter is often not very good.It can make use of file common components of file hand to make several simple electronic light meter, and use silicon pfiotocell as a pbotosensitive device, small ampere meter（analog, digital） as the indicator device, in order to improve file sensitivity, it can be used to improve file sensitivity.The first class transistor amplifier is added to file simple electronic light meter circuit, and the self-made light meter is compared with file special light meter.The value of the light circle and velocity measured by file self- made photometer is marked on file potenfiometer disc and the current meter disk of the self-made light meter respectively.

关 键 词：测光表 电子 设计 晶体管放大器 摄影爱好者 感光器件 硅光电池 高灵敏度 

分 类 号：TM914[电气工程—电力电子与电力传动]