Brian Mury: >> You should see +12 volts or -12 volts (actually anything between 3 >> and 15 meets the spec, but you'll usually see somewhere around 12). >> Negative voltages are high, positive voltages are low,
Tim: > Other way around... A high (digital 1) is a positive voltage, a low > (digital 0) is a lower or negative voltage (i.e. less than the 1's > voltage, whether it be zero or below zero). > > All digital logic is this way. There are cases where the low signal > is the active state (i.e. a 0 is true and 1 is false), called > "negative logic," or "active low," but it's still a case of 1's > voltage is greater than 0's. It's the meaning of 0 and 1 that's > inverted. Scratch that... Serial *data* lines are backwards. Gawd I hate negative logic. -- [tim@localhost ~]$ uname -r 2.6.27.25-78.2.56.fc9.i686 Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
