AAA power inverter noise
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- klerk
- Posts: 8
- Joined: Thu Mar 12, 2015 12:58 pm
AAA power inverter noise
just received my 4xAAA battery powered power inverters, and they both emit a high frequency noise when all 4 batteries are placed. one makes the noise much more loudly when powered on. i'm using the batteries that came with the shipment. what am i doing wrong?
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
This is normal for inverters. The inverter is converting the ~6v DC from the 4xAA cells to ~100v AC at around 1-2KHz. The combination of the voltage boost and high-frequency switching creates audible vibrations in the inverter components.
Although it sounds pretty loud operating on a tabletop, if you stick it in your pocket you will barely hear it.
Although it sounds pretty loud operating on a tabletop, if you stick it in your pocket you will barely hear it.
- klerk
- Posts: 8
- Joined: Thu Mar 12, 2015 12:58 pm
Re: AAA power inverter noise
unfortunately my application is for wall art....and the sound is an issue. i've never experienced this sound with any other battery powered device. is there a different inverter you can send me that doesn't squeal when the batteries are inserted?
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
They all do that to some degree. Some have had luck reducing the sound by wrapping them in foam and/or opening the case and filling the voids with hot-glue.
- klerk
- Posts: 8
- Joined: Thu Mar 12, 2015 12:58 pm
Re: AAA power inverter noise
if i cannot silence the inverter to an acceptable level, can i return my order for a full refund? i received it yesterday.
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
We can accept returns on unmodified products only, so I'd try the wrapping solution first.
- klerk
- Posts: 8
- Joined: Thu Mar 12, 2015 12:58 pm
Re: AAA power inverter noise
how would a 3V inverter compare to the 6V that came with the kit (that i'm having problems with)? will it result in a dimmer strip?
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
The 3v inverter will be somewhat dimmer using the same length of strip.
- klerk
- Posts: 8
- Joined: Thu Mar 12, 2015 12:58 pm
Re: AAA power inverter noise
how do i make a return? Do i need a return authorization number? please provide details. thanks.
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
Please contact [email protected] with a link to this thread and they will help arrange the return.
- Rothmj
- Posts: 1
- Joined: Thu May 07, 2015 10:25 am
Re: AAA power inverter noise
Does filing the void cause any heat issues and is it as simple as filing the entire void with glue from a glue gun?
- adafruit_support_bill
- Posts: 88086
- Joined: Sat Feb 07, 2009 10:11 am
Re: AAA power inverter noise
These don't run very hot to begin with, so the glue does not seem to cause any problems.
Filling the void should attenuate the noise noticeably, but probably not silence it completely.
Filling the void should attenuate the noise noticeably, but probably not silence it completely.
Please be positive and constructive with your questions and comments.