Hi,
Has anyone provide poe power to about 100m that would allow the harvesting of the dc power to be stepped down using a buck converter for use with devices at lower voltage? Obviously I would need to be mindful of not exceeding the wattage capacity of the poe supply.
Is it a case of just terminating the appropriate wires from the cat6?
Pat
Tom
yeah i’velooked at those. I dread going to jaycar - twice the price of online.
I was looking to be able to take out 24v power from the poe specifically for the throw in type pressure sensor which is rated at 12-24v.
My thinking was that if I have a 20v power (buck step down) to the sensor that the current readings should be mmore reliable than using 12v - the lower limit of operation. Does that sound right?
Anyway the plan was to use the voltage supplied by my poe switch - about 54v and split it twice using buck converters to both 20v and 5v. i have plenty of wattage left on the switch.
Does this make sense?
Pat
I did say:
You don’t have to buy that particular model. They are available in 5V and 12V with various types of plugs form a large number of places.
The end device needs to negotiate with the switch for it to send power.
Once you pay for 2 converters, plus an enclosure to house them, plus time and effort to wire up… sometimes it’s more beneficial to just buy an off-the-shelf solution.
Tom,
apologies if my reply indicated negativity - it wasn’t intended.
You have provided me with the answewr that I wasn’t sure of though. The end device needs to negotiate with the switch to provide power.
thanks
Pat
Dave,
I have thought about this but I find the tinkering with electronics very satisfying (except for the frustration times).
I have looked at the solar solution that Lars Klint has put in. I think he might have more money than me though. This still might end up the best solution.
Anyway I have two of these puppies ( [NanoSwitch - 4 Port Outdoor Switch] from ubwh coming soon as i want to install a poe camera and a couple of other gizmos at my entry gate. I have a poe splitter coming as well thanks to advice from Tom.
Yeah - off the shelf is great - but I specifically wanted gear to talk back to HA. The old water measuring device I had (Gallagher) would not do this and despite contacting the company a number of times would not provide me with any information to allow me to try.
That is why I started playing with wires and magic smoke devices.
Pat
I totally get this, I’m the same. I have a lot of little ESP projects around the house but in some places I still use off-the-shelf parts to make the whole thing come together. eg: I built an irrigation controller but still used a store bought 240-24v power supply rather than building one.