此程序是利用2051单片机P1.0,P1.1精密比较器功能实现a/d转换通过P1.0电位器调节，控制七只电磁铁动作间隔-This program implement A/D conversion by using precise comparision function of P1.0 and P1.1 of MCU 2051. P1.0 is used to adjust potential meter to control the time intervals of seven magnetic relays.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001123s ]
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:0.083422s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001077s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001895s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001089s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003545s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000943s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003332s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014608s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001267s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 319866 [ RunTime:0.001562s ]
