Author Topic: Is this safe? USB light and Pen drive.  (Read 5450 times)

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Offline Normanfernandez

Is this safe? USB light and Pen drive.
« on: September 26, 2018, 12:58:47 PM »
I've used a USB Light on the keyboard ( Keyboard USB PORT)

The  keyboard can Handle 2 Pen Drives
If I use a USB Hub and Connect the Light and Another Pen Drive at the same time.
Is it safe??
Norman Fernandez Keyboardplayer
https://www.youtube.com/channel/UCngm8h5k5NmKnowJpkxlDBQ

PSR S770 - Roland FP 30 - PSR 280
Cubase - Kontakt6
 

avtur

  • Guest
Re: Is this safe? USB light and Pen drive.
« Reply #1 on: September 26, 2018, 02:36:23 PM »
I believe that there is a 'standard' for the power available from a USB port, which is 500mA (milliamp) maximum at 5 volts.

Pen drives take very little power but other devices may take more, I would think that the light you use should have a power rating somewhere on it.

Normally single devices don't exceed the power rating but when several devices are connected via a hub then that may cause a problem. 
 

Offline Al Ram

Re: Is this safe? USB light and Pen drive.
« Reply #2 on: September 26, 2018, 08:15:39 PM »
I used to have a small USB light and also a pen drive both connected at same time to my Tyros 4 an Tyros 5.

However, there were not on a hub, they were each on their individual T5 USB

Never had a problem.

I used the light to better see the music sheets, however, i moved to iPad now, so I no longer need the USB ligth.  But used it for a couple of years with no problem.

thanks
AL
San Diego/Tijuana
 

Offline Normanfernandez

Re: Is this safe? USB light and Pen drive.
« Reply #3 on: September 27, 2018, 06:09:51 AM »
I used to have a small USB light and also a pen drive both connected at same time to my Tyros 4 an Tyros 5.

However, there were not on a hub, they were each on their individual T5 USB

Never had a problem.

I used the light to better see the music sheets, however, i moved to iPad now, so I no longer need the USB ligth.  But used it for a couple of years with no problem.

thanks
We have 1 port , it's Max power supply is 500 ma , I'll have to check how power does a USB hub take
Norman Fernandez Keyboardplayer
https://www.youtube.com/channel/UCngm8h5k5NmKnowJpkxlDBQ

PSR S770 - Roland FP 30 - PSR 280
Cubase - Kontakt6
 

Offline AlBags

Re: Is this safe? USB light and Pen drive.
« Reply #4 on: September 27, 2018, 10:37:30 PM »

DONT use cheap devices powering themselves from USB. Especially power consuming devices like lights (even LED) or fans, motors, etc. Under some circumstances, it can burn out the USB controller .. that will mean a new board. USB lights can spike on switch-on asto much as 10 times their rated current!

Not worth the risk!

Al.
😊  I started out with nothing .. and I've got most of it left!  😊

🎹 Tyros 5-76,  now the brilliant Genos 🎹
Genelec 8030C Studio Monitors on K&M stands
K&M Spider Pro Stand, K&M Accessories. I love K&M!
 

Offline Toril S

Re: Is this safe? USB light and Pen drive.
« Reply #5 on: September 27, 2018, 10:53:03 PM »
Hi Norman. I agree with Al. Stay clear. Get a lamp that is powered the traditional way, or, if you use an USB light, power it by using an USB adapter and connect that to a wall socket. That way, you don't damage the USB controller on your keyboard.
Toril S

Genos, Tyros 5, PSR S975, PSR 2100
and PSR-47.
Former keyboards: PSR-S970.

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