Re: gEDA-user: Driving a constant RS-232 output directly from +12V

2006-11-30 Thread Mike Jarabek
Tomaz Solc <[EMAIL PROTECTED]> said: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi > > > So is there anything terribly bad/spec-violating/unsafe about driving > > an always-asserted RS-232 output directly from the +12V supply through a > > resistor, or is that perfectly OK? What shou

Re: gEDA-user: Driving a constant RS-232 output directly from +12V

2006-11-29 Thread Tomaz Solc
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi > So is there anything terribly bad/spec-violating/unsafe about driving > an always-asserted RS-232 output directly from the +12V supply through a > resistor, or is that perfectly OK? What should the resistor value be? > Or should I use something

gEDA-user: Driving a constant RS-232 output directly from +12V

2006-11-28 Thread Michael Sokolov
Hello fellow gEDA users, I have a general hardware design question not specific to a particular design tool, so please forgive me for OT. Suppose I have an RS-232 output (DTR in my case) that is always asserted. Is it acceptable to drive it directly from the +12V supply (through a resistor I pre