2021-03-19T07:55:25Z
FluxBB
https://whycan.com/viewtopic.php?id=246
网上订个10元的万用表放家里 解决类似疑难杂症]]>
https://whycan.com/profile.php?id=466
2021-03-19T07:55:25Z
https://whycan.com/viewtopic.php?pid=60942#p60942
如果db9的usb转串口线,必然是232的,如果像个U盘之类的大小的或者模块的 或者出来四根线的 基本都是ttl]]>
https://whycan.com/profile.php?id=2864
2021-03-19T00:29:02Z
https://whycan.com/viewtopic.php?pid=60922#p60922
USB转串口的一半没有额外芯片,就是TTL电平,后面加了电平转换芯片的话就是232电平]]>
https://whycan.com/profile.php?id=1136
2020-07-28T09:21:46Z
https://whycan.com/viewtopic.php?pid=50558#p50558
有时就是有了232芯片也达不到标准的电平. 但是能凑合用, 要求严格它就露馅了]]>
https://whycan.com/profile.php?id=1166
2019-01-28T09:25:30Z
https://whycan.com/viewtopic.php?pid=14904#p14904
看芯片,232的一般有额外的接口芯片]]>
https://whycan.com/profile.php?id=669
2019-01-28T06:10:31Z
https://whycan.com/viewtopic.php?pid=14893#p14893
顶一下]]>
https://whycan.com/profile.php?id=1394
2019-01-28T05:37:47Z
https://whycan.com/viewtopic.php?pid=14890#p14890
大神们,串口转usb那个线是ttl的还是RS232的,家里面没有万用表;打不到电压]]>
https://whycan.com/profile.php?id=107
2017-09-25T05:52:35Z
https://whycan.com/viewtopic.php?pid=557#p557