Will a 12.5V DC power supply damage a 12V device ? See details inside..

[alesserfate]

Hello,

I am trying to power a 12V DC microphone amplifier that's designed for a studio, in a vehicle where circuit voltage can vary 10V - 14.5V.

To fight the fluctuating voltage, I have a DC to DC voltage stabilizer which takes anything between 10V to 30V and brings it down to 12.5V.

My question is, will the 12V microphone amplifier be damaged by the 0.5V over recommended voltage level input ?

I have tried to contact the manufacturer to inquire about said concern and received no reply. There is an enclosed specifications sheet as well as a schematic for the amplifier at http://www.rolls.com/pdf/M_MP13.pdf

If anyone can weigh in on this, I would appreciate it.

Best Regards.

 

[Arouse1973]

Just put a dode in the power line if your worried. This will give you about 11.9 Volts. Choose a diode that can handle the current. A silicon diode drops about 0.6 Volts, this is dependant on current so check the data sheet.
Adam

 

[Gryd3]

There is almost always a tolerance that components are built for.
12V to 12.5V is off by about 4%, which I would be willing to risk on any of my 12V hardware.
(Hell... even power supplies in computers vary by more than that.)
Mind you, that tolerance should not be tested... so it's good you're not hooking it directly to the battery, as 14.4V as a 20% variation is most likely too much.

It's your call, but as Adam stated above, you can use a diode's forward voltage drop to bring it closer to 12V.
I'm curious on the voltage regulator you have found though. Can it not be adjusted for 12V output?

 

[Neal]

Hello,

I am trying to power a 12V DC microphone amplifier that's designed for a studio, in a vehicle where circuit voltage can vary 10V - 14.5V.

To fight the fluctuating voltage, I have a DC to DC voltage stabilizer which takes anything between 10V to 30V and brings it down to 12.5V.

My question is, will the 12V microphone amplifier be damaged by the 0.5V over recommended voltage level input ?

I have tried to contact the manufacturer to inquire about said concern and received no reply. There is an enclosed specifications sheet as well as a schematic for the amplifier at http://www.rolls.com/pdf/M_MP13.pdf

If anyone can weigh in on this, I would appreciate it.

Best Regards.

The schematic shows 14-24 volts input and it goes into a 12 volt regulator, so no problem.

 

[davenn]

Hi alesserfate
welcome to EP

To fight the fluctuating voltage, I have a DC to DC voltage stabilizer which takes anything between 10V to 30V and brings it down to 12.5V.

The schematic shows 14-24 volts input and it goes into a 12 volt regulator, so no problem.

exactly, so no need for any external stabilizer ... its just a waste of time and money

Dave

 

[alesserfate]

Great, thanks everyone, for the welcome and for the information. I appreciate the technical input.

Regards.

 

[KrisBlueNZ]

Hi and welcome to Electronics Point

I would be more concerned about the horrible electrical noise on the automotive 12V supply - unless the motor isn't running while you're using the microphone. This noise tends to get everywhere and is hard to eliminate. Let us know how it goes!

 

[alesserfate]

Hey Guys,

I used the external regular, knowing that there is an internal one as well. It seems to work flawlessly with no background noise.

Having another issue with this setup working in only 2/3 vehicles. Details inside a new thread I created.

https://www.electronicspoint.com/th...-with-a-stereo-aux-in-no-sound-at-all.271918/

Thanks again,