jump to navigation

DS18B20 – 2 wire configuration – 2 Temp Probe — inconsistent results June 18, 2011

Posted by rik94566 in aquaponic automation, aquaponics, arduino, CAT 5 Cable, DIY aquaponics, DS18B20, Hacks, indoor aquaponics, indoor duckweed growing, indoor gardens, indoor growing, Rj45 connector, sensor, Sensor Hub, Stainless Steel Temp Probe, Standards, Temperature Probe.
Tags: , , , , ,
7 comments

Being that I have a testing platform and the fact that I want to learn everything there is to know about how the DS18B20 behaves and performs I decided to test a 2-wire configuration using 2 temp probes.  Results were inconsistent.

Here is how I configured the RJ45 testing hub.  I kept the arduino side the same as in the last blog post and only changed the wire configuration on the hub side.   I configured the hub the same way for both position 1 and 2.

2-wire configuration at hub

The inconsistent results were generated only on position 2 of the hub.  I have no idea why this occurs.  It seems to be at random as to when it occurs in the cycles of the sketch.  With results that are inconsistent it is clear that it is not a good idea to use this for important work.  For 2 or 3 cycles normal temperatures report out and then the 185.00F is reported out.  Strange stuff.

I am using the same Sketch posted earlier for testing 2 Probe DS18B20 sensors.

Resuts from Sketch (inconsistent results Probe 002)

Doing a little research I found that inconsistent results are experienced when adding multiple DS18B20 sensors when using the parasite power mode, which is the 2-wire configuration I have working here. I will test other situations now and try and determine issues with this power modes and configurations

Advertisements

LED – Glow Panel installed March 20, 2011

Posted by rik94566 in aquaponic automation, aquaponics, DIY aquaponics, Duckweed, Glow Panel 45, indoor aquaponics, indoor duckweed growing, indoor gardens, indoor growing, LED growing, LED lights, sunshine systems.
Tags: , , , , ,
2 comments

Installed the Glow Panel 45 this past week.  Running it at 10 hours a day and at 20 inches above the grow media.  Right now the temperatures in Northern California have been to cold to have duckweed being grown in the local waterways.  So I went to a local garden shop and found a few duckweed plants to throw into the water to jump start the test.  I will add more duckweed in larger volume once growing conditions become better and allow for harvest of more duckweed in the local area.

More pictures of the Glow Panel 45 can be viewed at the link below:

https://picasaweb.google.com/rik.kretzinger/LEDLight?authkey=Gv1sRgCMbMmL2ZluDHmgE#

 

LED light order came March 11, 2011

Posted by rik94566 in Duckweed, indoor aquaponics, indoor duckweed growing, indoor gardens, indoor growing, LED growing, LED lights, sunshine systems.
Tags: , , , , , , , ,
2 comments

I have been looking for an LED light source to play around with.  It came today.  It has gotten good reviews and does not generate any heat while operating.  I was surprised how light in weight is was.  It is easy to connect and will be fun to work with on my new portable system that I have in my garage.  I will be blogging about that soon.  Good thing tomorrow is Friday, I will have the weekend to get it mounted and get started on my duckweed growing.