数字温度计制作指导,是基于51单片机,用DS18B20制作的数字温度计,并可自行添加报警电路实现报警。包括电路图和程序以及详细的制作流程。-Digital thermometer production guidance is based on 51 microcontroller, digital thermometer with DS18B20 produced, and can add their own alarm circuit alarm. Including schematic and procedures, and detailed production process.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002569s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.104762s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001381s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002005s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001325s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003827s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001532s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003400s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015085s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001494s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 316060 [ RunTime:0.001538s ]