Hi All
I am a newbe here and have a simple question (well I hope it is simple)
I have bought a rain sensor - this basically turns on a relay when it detects rain and turns off the relay when the rain has gone away.
The relay has NO and NC contacts + common.
What I would like to do is to connect the relay to my computer via an RS-232 Interface.
Since I am only interested in the state of the relay ON/OFF I would this would be quite simple to connect to a control line on the RS 232 Interface?
My electronics knowledge is very limited but I can follow instructions and put a simple circuit together but not design one.
Would connecting the output from the relay NO to the DTR (pin 6) or DSR (pin 4) + common to the signal ground (pin 5) be enough for me for me to read the state of the relay from the PC?
The spec on the output of the relay is
Max load 1A 24V
The input voltage to the unit takes 9-30V DC.
At this point I do not know what the output voltage is - maybe 24V - I have not yet recieved the unit.
The unit is available at www rainsensors com and there is a FAQ under the support section.
Any help would be appreciated
Cheers
Chris
I am a newbe here and have a simple question (well I hope it is simple)
I have bought a rain sensor - this basically turns on a relay when it detects rain and turns off the relay when the rain has gone away.
The relay has NO and NC contacts + common.
What I would like to do is to connect the relay to my computer via an RS-232 Interface.
Since I am only interested in the state of the relay ON/OFF I would this would be quite simple to connect to a control line on the RS 232 Interface?
My electronics knowledge is very limited but I can follow instructions and put a simple circuit together but not design one.
Would connecting the output from the relay NO to the DTR (pin 6) or DSR (pin 4) + common to the signal ground (pin 5) be enough for me for me to read the state of the relay from the PC?
The spec on the output of the relay is
Max load 1A 24V
The input voltage to the unit takes 9-30V DC.
At this point I do not know what the output voltage is - maybe 24V - I have not yet recieved the unit.
The unit is available at www rainsensors com and there is a FAQ under the support section.
Any help would be appreciated
Cheers
Chris