1-Wire Energy Management Projects

Home Telemetry and Control Systems to Monitor and Reduce Energy Costs

 Relay Test Board 

Anytime you create these kinds of electronic control systems, you need to do bench testing to verify the designs and reliability before you actual deploy the system. You want to find out how compatible and reliable the assembled system is.

Below is my bench test board with all the solenoids I planned on using in the design.

Starting at the bottom of the board is a 24V AC transformer. 24V AC is a standard control voltage used in home and many industry control systems

Next up is a standard 120V AC/ 20 A Contactor. This is controlled with 24V AC. This one happens to be a unit I pulled from an old outside condenser unit I found in an alley somebody had left as trash. These relays are extremely reliable and can last 25+ years. New ones are around $10.

Next up is a 120V AC light fixture with a flood light socket.

And finally on top is a 24V AC Sprinkler Value.

Then on the right is the wiring bus where  I used click leads to connect to my control boards.


Wire Length

The other advantage of these devices is the distance you can run the wires (phone cord) from the controller.

Sources on the internet claim 1-Wire devices support distances of thousands of feet. I've not tested that but so far my shorter distance tests have been successful.

In my project I plan on running about a dozen temperature sensors with wire lengths of about 300 total feet. (This is not as easy as it sounds but we'll discuss that in my "Timeline" articles)