Electronics > Beginners
Is it safe to power an Arduino project with a phone charger plugged to wall?
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ebastler:

--- Quote from: apis on April 04, 2019, 07:55:35 pm ---Your project might still catch fire though. That is the biggest danger if it's something that will not be monitored while it's plugged in imo.

--- End quote ---

I think setting something on fire with a (safe, decent quality) 1A phone charger is a stretch. That’s assuming that you do not build a big energy store, lithium battery or such into your own electronics, of course.
apis:
Many usb chargers can give you 2.5 A, at 5 V it's 12.5 W. If something fails shorted in a plastic or wooden enclosure that could be enough to start a fire. I always use a fuse for peace of mind at least. I'm just saying it's something to keep in mind.
radiolistener:
Those, who likes to use cheap power supplies for their hobby projects, may be interested in this power supply board  :)

https://www.aliexpress.com/item/XH-M229-Desktop-Computer-Chassis-Power-Supply-ATX-Transfer-Board-Power-Take-off-Board-Power-Output/32875771794.html

With this board you can use ATX power supply from computer ^-^

Of course, the safety rules when you use such devices is your own responsibility.  ;)
m98:
Just use a medical IEC60601-1 certified charger like for example the Friwo FOX6-XM-USB. Similar price as most consumer-brand chargers and still as safe as it gets, if you want the peace of mind.

I'm personally fine with just using my regular phone charger for such projects. I also never had a low-power circuit catch fire, but I did find out on a few "learning opportunities", that my laptops USB ports are surprisingly well protected against all kinds of electrical abuse...
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