Hello,
For my current project, I am trying to use power from a domestic power line (110 volts) to act as continuous power for the Uno, and then turn on a 25 V motor. Are there any commercially available transformers that can get the job done easily, or are there other simple solutions that could work? I am new to electronics, and I don't want to damage anything. I want to make sure I am using proper conventions.
Thanks
Hello
Take search engine of your choice and ask the WWW for 'plug-in power supply unit +arduino'.
Continuous power means uninterruptible power to me. Is that what you were really after ?
To power the arduino you need a DC supply - transformers dont provide that.
Which one ? (provide a link)
How will it be powered?
How will it be controlled?
To get 5V for the Uno use an old phone charger if you have one and connect the negative to 0V / ground and the +5V to the 5V pin.
If you don't have an old phone charger buy a power supply with a 5V output, they are available for not much from your favourite retail website.
I suggest you start a collection of old power supplies.
Interesting. I've been in the forum this morning searching for similar answers for a different project looking for a similar solution (if you follow me). I am wanting to take the 110V in from the wall, convert it to 12V DC @ 1A and use the 12V side to power different 12V LEDs and power an ArduinoNano inside a project box -- and use the 110V AC side to power a duplex outlet the Nano will trigger through a relay.
Before it's said by others, having high and low voltages in close proximity to each other takes care and attention, so be warned. In my project I'm isolating the high voltage components from the low voltage components to the greatest extent possible and added a 6Amp breaker for the incoming 110V AC (what I'm powering off the outlet should not exceed 6A) and looking at a fuse arrangement for the 12v side this morning.
I ordered this off "the zon" and it delivers 12V DC @ 1A. It also comes in different voltages and amperages. I've made a simple connections on my test bench to try it out using an old plug from a non-functioning toaster. so far, so good and it powers the Nano.
This may only solves your 110V AC to 5V DC challenge, but it might be a start.
I'm interested in the reaction to this from others reading this and if other's have used this kind of component and any cautions or concerns. For those not clicking the link the description of the component is:
Here's a couple specifics I copied off the listing for the 12V and 5V versions:
What am I missing ? You're essentially rebuilding a wall-wart. Why not use a wall plug extension box, get separate 12V and 5V wall-warts and use something where all the unnecessary build has already been done ?
Triad, Coilcraft, Endicott, Pico Electronics are some of the U.S. based transformer manufacturers. All the big electronics suppliers stock power transformers like 110:5 VAC and 110:25 VAC.
And, of course, discarded AC-DC power bricks for games, computer monitors and appliances, in a very wide variety of voltages and currents, can be picked up for pocket change at thrift shops, computer recycling outfits, and maybe your own junk box.
Hi, @computercrafter
What are the specs on the motor, can you please post a link?
What is the application?
Thanks.. Tom.. 
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