Batteries are "screaming"

• Apr 2, 2012

• #1

MrMcChicken

0

Joined

Mar 6, 2011

Messages

279

Points

28

Hi all, I have bought a some cheap AAA 1,5V batteries. I put them into my new 405nm build (for a look, click the link in the signature).
Then I switched it on and sometimes the batteries are making noises.

It sounds like they would screm. Is this normal? The laser works quite well on them.

 

• Apr 2, 2012

• #2

jimdt7

0

Joined

Feb 5, 2011

Messages

1,893

Points

48

Strange..... :thinking:
Are you sure that the sound is coming from the batt's and not from the driver ?
Where did you buy the batt's from ?

Jim

 

• Apr 2, 2012

• #3

MrMcChicken

0

Joined

Mar 6, 2011

Messages

279

Points

28

Okay, it could be the battery, or the driver too, I'm not shure. The batteries are from an supermarket.
What does it mean if something of the compnents makes noise? Could i have troubble with it? :/

 

Last edited: Apr 2, 2012

• Apr 2, 2012

• #4

Cyparagon

0

Joined

Sep 12, 2007

Messages

9,399

Points

113

The driver is a boost driver. They have a switching frequency that is usually several tens of kHz, but sometimes the frequency is low enough that you can hear components on the board vibrating at the fundamental. It is normal and nothing to worry about.

 

Last edited: Apr 2, 2012

• Apr 2, 2012

• #5

Hiemal

0

Joined

Dec 27, 2011

Messages

1,443

Points

63

That or the little gnomes inside of the batteries are in pain...

 

• Apr 2, 2012

• #6

DTR

0

Joined

Jun 24, 2010

Messages

5,684

Points

113

AAA's don't have much of a discharge rate. You may need to get a Li-Ion. Is it a microboost unit that I sent you?

 

• Apr 2, 2012

• #7

Mohrenberg

0

Joined

Aug 30, 2008

Messages

6,891

Points

83

Le Quack said:

That or the little gnomes inside of the batteries are in pain...

Click to expand...

This is the correct answer. Ignore all others.

 

• Apr 3, 2012

• #8

MrMcChicken

0

Joined

Mar 6, 2011

Messages

279

Points

28

@DTR: yes it is the micro boost driver.
But if I don't have anything to worry about, it doesn't matters .
Just hoping the gnomes don't come out

Thanks all for help!

 

• Apr 4, 2012

• #9

Benm

0

Joined

Aug 16, 2007

Messages

7,896

Points

113

What you are hearing is probably similar to a camera flash charging... just a switchmode power supply operating at audible frequency. Usually its nothing to worry about, and can be remedied by securing inductor wirings with some epoxy resin or glue.

 

• Apr 4, 2012

• #10

jcranmer

0

Joined

Mar 23, 2011

Messages

2,095

Points

63

Yep. Some drivers just do that. I've only had it happen with a cheap 405 pen, but from what I can tell, it doesn't seem to cause any issues.

 

• Apr 8, 2012

• #11

BShanahan14rulz

0

Joined

Dec 29, 2009

Messages

3,136

Points

63

Like others have said, it is probably the driver. If you still think it is the batteries, stretch the springs so that they'll put a little bit more pressure on the battery.