2051单片机的18b20温度计。有效位数为2为，程序里面以预留出小数点位，配套3位数码管即可显示。-2051 microcontroller 18b20 thermometer. 2 for the effective number of bits, the program which in order to set aside a decimal place, supporting three digital control to display.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002015s ]
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:0.087746s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002227s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.005616s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003653s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002057s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017199s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002468s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 296513 [ RunTime:0.001164s ]
