rs232 relay control

jj_alukkas

Joined Jan 8, 2009
753
No no, I stated before that a resistor is absolute necessity. I asked if its ok to use a LED on the DTR pin along with a resistor as it is a state indicator port.
 

CDRIVE

Joined Jul 1, 2008
2,219
Sure, I do it all the time. All the lines on the serial port have enough drive to light multiple Leds, but I rarely drive Leds to their maximum current.
 
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