Wiring Question

[nightwalker]

I'm successfully up and running for a couple of weeks now. I have a ds18s20 temp sensor to put in a very small place, no board. I want to power it from the Master Hub instead of using parasitic power. It looks like I need to wire it on the sensor to the rj415 plug like this....

pin 1 blue-DQ
pin 2 white/blue-gnd
pin 3 green-Vdd-5vdc

Can someone confirm that this will work and is there any other changes that need to be made?

 

[ericvic]

I'm successfully up and running for a couple of weeks now. I have a ds18s20 temp sensor to put in a very small place, no board. I want to power it from the Master Hub instead of using parasitic power. It looks like I need to wire it on the sensor to the rj415 plug like this....

pin 1 blue-DQ
pin 2 white/blue-gnd
pin 3 green-Vdd-5vdc

Can someone confirm that this will work and is there any other changes that need to be made?

You have pins 1 & 2 backwards. On the DS18S20 pin 1 is GND and pin2 is DQ.

Eric

 

[nightwalker]

I'm successfully up and running for a couple of weeks now. I have a ds18s20 temp sensor to put in a very small place, no board. I want to power it from the Master Hub instead of using parasitic power. It looks like I need to wire it on the sensor to the rj415 plug like this....

pin 1 blue-DQ
pin 2 white/blue-gnd
pin 3 green-Vdd-5vdc

Can someone confirm that this will work and is there any other changes that need to be made?

You have pins 1 & 2 backwards. On the DS18S20 pin 1 is GND and pin2 is DQ.

Eric

opps, believe it or not that's what i meant to write. Thanks eric!

Is there anything in the master hub that needs to be changed or is it fine as is? I'll be putting this sensor on a different port from the others I have that are using parasitic power.

 

[EL34]

I'm running 6-8 DS1820's on the 6 channel master hub.
3 of the DS1820's are out on the ends of 36" wires.
You don't have to do anything to the hub.

As long as you get the wiring right on the sensor end and the rj45 end, you are good to go.

 

[nightwalker]

I'm running 6-8 DS1820's on the 6 channel master hub.
3 of the DS1820's are out on the ends of 36" wires.
You don't have to do anything to the hub.

As long as you get the wiring right on the sensor end and the rj45 end, you are good to go.

excellent, sounds like I'm good to go then. I'm using

pin 1 white/blue-gnd
pin 2 blue-DQ
pin 3 green-Vdd-5vdc

Thanks for the reassurance.

 

[nightwalker]

I'm having a bit of trouble trying to add a DS18s20 temp sensor to my hobby boards hub. I've done this twice before so I'm at a loss as to where the problem could be. I using wiring as follows

pin 1 white/blue-gnd
pin 2 blue-DQ
pin 3 green-Vdd-5vdc
Connected to an RJ45 connector using the hobby boards wiring, I believe it's 568A.

There really are only 3 wires used so i can't imagine what I could be doing wrong but every time I plug it into the hub I can watch the one wire viewer just go dead. I've gone over and over this for hours, it really shouldn't be this hard. The first two legs were a snap using channel 1 both main and aux inputs. I've tried channels 2 and 3 and they all exhibit the same behavior, it wipes out everything on the viewer until i unplug it again, then all comes back online.

Any thoughts or suggestions, I've redone the plug twice, changed the sensor, plugged it in without a sensor just to make sure there wasn't a short somewhere along th line. without the sensor the other channels stay online. put the sensor on and the whole hub goes dead.

Any thoughts or suggestions?

 

[nightwalker]

Well, this was a weird one, I found the problem. I had bought a packet of 6 DS18s20's about a month ago knowing i was going to do this. So far two of them have had pins 1 and 3 reversed. Once i swapped the wiring and reversed it as well the sensor came right up,

Very weird, I wonder if that happens often?