Is there an external power supply?
652882
My HVAC setup is old and did not supply power (C wire) to the thermostat. I purchased a 24V transformer from now-nonexistent RadioShack to drive the thermostat. It's plugged in in my bedroom closet, and the wire is ran up to the attic and down into the wall where the thermostat is installed. Everything has been working great for 3 years so far.
652883
D. Mei's answer is correct. I have mine working with an external (plug-in) power supply. I bought an item on Amazon called a 24 volt transformer (http://www.amazon.com/gp/product/B004VMVDTA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) and took a wire off another old transformer (from an old wireless router - just one I had laying around but no longer needed) - stripped the ends of the wires - fed one end into the t-state and connected the other end to the 24v adaater. It was pretty simple and has been working for 6 months now. I came back to buy another for our separate in law suite. Note: in some states there are rebate programs. I got $100 from the state of GA for installing this $200 unit. I love the thing. D. Mei's answer is correct. I have mine working with an external (plug-in) power supply. I bought an item on Amazon called a 24 volt transformer (http://www.amazon.com/gp/product/B004VMVDTA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) and took a wire off another old transformer (from an old wireless router - just one I had laying around but no longer needed) - stripped the ends of the wires - fed one end into the t-state and connected the other end to the 24v adaater. It was pretty simple and has been working for 6 months now. I came back to buy another for our separate in law... » Read More D. Mei's answer is correct. I have mine working with an external (plug-in) power supply. I bought an item on Amazon called a 24 volt transformer (http://www.amazon.com/gp/product/B004VMVDTA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) and took a wire off another old transformer (from an old wireless router - just one I had laying around but no longer needed) - stripped the ends of the wires - fed one end into the t-state and connected the other end to the 24v adaater. It was pretty simple and has been working for 6 months now. I came back to buy another for our separate in law suite. Note: in some states there are rebate programs. I got $100 from the state of GA for installing this $200 unit. I love the thing. « Show Less
652884
Some have answered as if this was a dumb question. Its not. If your furnace or boiler does not provide a 24 volt lead you could use an external power supply to power this thermostat. If you have extra conductors available to use in your thermostat wire, you could plug it into the service plug next to your boiler or furnace. Then by connecting the external power supply to the tstat wire, you could power the tstat. If you don't have any unused conductors in your tstat wire, you could power it by feeding it power at the thermostat. While this is do-able. It would be ugly because there would be visible wires leading from the outlet where the power supply is plugged, into the back of the tstat. Some have answered as if this was a dumb question. Its not. If your furnace or boiler does not provide a 24 volt lead you could use an external power supply to power this thermostat. If you have extra conductors available to use in your thermostat wire, you could plug it into the service plug next to your boiler or furnace. Then by connecting the external power supply to the tstat wire, you could power the tstat. If you don't have any unused conductors in your tstat wire, you could power it by feeding it power at the thermostat. While this is do-able. It would be... » Read More Some have answered as if this was a dumb question. Its not. If your furnace or boiler does not provide a 24 volt lead you could use an external power supply to power this thermostat. If you have extra conductors available to use in your thermostat wire, you could plug it into the service plug next to your boiler or furnace. Then by connecting the external power supply to the tstat wire, you could power the tstat. If you don't have any unused conductors in your tstat wire, you could power it by feeding it power at the thermostat. While this is do-able. It would be ugly because there would be visible wires leading from the outlet where the power supply is plugged, into the back of the tstat. « Show Less
652885
not one person knows what they are talking about on this. R and C stand for Red and Common on the stat. this is the low voltage power from the furnace, boiler, Heat pump or geothermal unit. This is where the stat gets its power from. Green is the fan control. Yellow is for A/C control. White is for the heating side of the stat.The only way a Thermostat has external power is through batteries. this stat works off the units power source. it will back up itself when the power is down. so if your power go
652886
The only power supply comes from the heater/AC unit. There are no user-replacable batteries in this unit. If power is lost, the unit's memory chip holds the stored setting until power is restored.
652887
Some have answered as if this was a dumb question. Its not. If your furnace or boiler does not provide a 24 volt lead you could use an external power supply to power this thermostat. If you have extra conductors available to use in your thermostat wire, you could plug it into the service plug next to your boiler or furnace. Then by connecting the external power supply to the tstat wire, you could power the tstat. If you don't have any unused conductors in your tstat wire, you could power it by feeding it power at the thermostat. While this is do-able. It would be ugly because there would be visible wires leading from the outlet where the power supply is plugged, into the back of the tstat.
2087378
Mine worked with power from HDMI port. I don't believe external power is required.
23300
No. It gets its power supply from the raspberry itself. No need for external power
1523871
No it doesn't come with a power supply. The kind you need is really more dependent on other components in your system, usually the video card.
1655518
The external power adapter is simply a mini USB cable connected to a computer or USB wall charger. You can find them on Amazon for under $4, and available at any electronics retailer. Make sure you get a mini USB cable (not micro-USB). The enclosure is tough but it is not weatherproof. You could use it outside as long as it doesn't get wet.
1650829
Mine DID NOT come with a power supply but there is a port for a 5 volt power supply
1750696
No. It's powered by the pcie connection. It has an optional power supply adapter, but its not necessary.
1882880
if you put 'chargeable' batteries in it you could charge them but outside of the camera. I don't believe there is anyway to have external power with this camera.
1855967
Almost every electronic gadget that you buy today has an external power supply. It is a great way to put one of the components that can fail in a place where it is a (relatively) low cost replacement compared to having to replace the entire monitor.
387582
This computer requires an external power supply, and in general, they are model specific. It looks like an obese laptop power supply. If you are buying one of these, be sure it has the power supply or you will be spending around $50 for one.
1704316
It uses an external power supply. It only used the USB and thunderbolt connections for data transfer.
2000271
This item doesn't require any external power connectors; it only draws power from the PCI Express slot. Hope this helps.
1187035
No. There is no external power source input to this camera. You have to keep the batteries charged. Odd they left that out.
1778447
Mine didn't, it is plugged into the monitor which provides the power. It's perfect for my setup. I think there's another version of this out there somewhere which has the power supply though, I am pretty sure I saw it when I was shopping for this.
169813
No, mine did not come with power supply. You have to buy one to be able to work. They need to clarify this in the description.
1587529
No. You can add one to it, externally, most likely via usb, but it doesn't come with one.
1346326
There is no external power button. A shortcoming for sure, but what I did was set my computer to startup at a specific time each day in the schedule settings under power control in the system preferences.