240v Plug – USB port

[Anonymous]

If I purchased one of these for use by the computer, would it work in this for use by the bed.

[Dave Rice]

I can’t see why not.

[The Duke]

I have a USB fan, similar to that jb and I run it off a plug. Well on my case a charging hub, but it’s extensively the same as a plug.

It’s been a god send this week. We have a large opening window in the bedroom, I sit the fab on the window sill and create ghetto air con.

[Ed P]

I use a 3 amp plug-in wart as a general purpose power supply for a variety of things ranging from a raspberry pi to recharging a pad to powering usb fans, to recharging usb devices.

The one you linked to is only 1 amp so it probably would not charge some pads, but it is more than good enough for the roughly 0.5 amp rating of the usb that you linked.

If you want a more general purpose power supply go for a 3 amp supply something like this.

[Anonymous]

Thanks all I will get one

[The Duke]

Ed, with these cheap fans, i aired on the side of caution and use a 1amp (or 1.1 iirc), just cos In my head I thought using the higher amperage usb on them may lead to issues.

Only speculation on my part, but I’d think the fan motor would take all the juice you could through at it.  it’s probably built with 500ma In mind, so I avoided on of my newer phone chargers.

Though John, that usb plug seems expensive. As it is only a pound shop plug. Find it on eBay for about £2, or grab one next time your in the high street. Use a laptop/pc/ playstation/tv etc for the time being to power it.

Or one of your phone/tablet chargers.

 

[Ed P]

Current draw is affected by the load on the motor and its rpm. Maximum draw takes place on start-up or if the fan is obstructed, Both a 1.5 amp and a 3 amp wart will result in eventual fire – though I grant the 3amp supply could result in it happening more quickly.

In either case both have dangers if left unattended or if you fall asleep near one. Sticking it on a fire-proof tray and making sure that there is nothing nearby that can catch fire might be a good idea. it would also be a good idea to make sure the fan cannot fall down and get jammed. Overall it is sightly dodgy duty in a bedroom.

To be honest I worry little about usb devices as they should have a current draw limiting device integrated into them – though I’ll admit that is a risk of the fuse not being there with market-stall kit. The bigger danger imo is the actual wall wart, really cheap warts could pose significant dangers. Those are things I’m much happier buying when they are supplied by Amazon rather than going for one from an unknown Chibay source.

[Author]

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