一个小型的数控电源的源码，采用DAC0832进行转换，实现0-12V的精度为0.1的步进调压。-NC a small power source, using the conversion DAC0832, 0-12V realize the accuracy of the stepper regulator 0.1.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001400s ]
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:0.092242s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001302s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001939s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001247s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003702s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001098s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003253s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016242s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001402s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 171407 [ RunTime:0.001349s ]
