用ADC0804测量模拟电压，电压范围从0V到5V都能精确的测量，该程序已调试成功，可直接运用-ADC0804 measurement using analog voltage, voltage range from 0V to 5V can precise measurement, the debugging procedure has been successful and could be directly applied
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001334s ]
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:0.124398s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001240s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001062s ]
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