从零起步动手学电子-畅读网

　　　　

从零起步动手学电子

作者：张军

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科学技术 >> 自然科学

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内容简介:

本书是一本以实践指导为特色的电子技术入门科普书，分3个章节进行了电子技术入门知识的介绍。D1章介绍电的产生、简单的电路识别知识。D2章介绍了主要电子元器件的基础知识，并介绍了相关电路实验、工具使用方法及简易电子制作项目等。第3章重点放在实际制作上，介绍了光控、声控、温控、遥控等趣味制作项目，为读者进一步学习电子技术知识提供了有益的指导和启发。

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.003059s ]
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SHOW FULL COLUMNS FROM `ls_friendly_link` [ RunTime:0.003525s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 48 LIMIT 1 [ RunTime:0.001810s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001673s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001470s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1772284534 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.802538s ]

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