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Topic: Powered Speaker Voltage? (Read 414 times) previous topic - next topic

sarf2k4

Hi,

I have Altec Lansing 120i since 2006 and I am planning to add arduino and bluetooth into it. It has a bulky 9v 1A power supply from AC and the power supply's shell started to crack already but still usable.

What I am considering for is to get rid of that bulky power supply with maybe either 5v or 12v dc input but I am concerned that I might blow up the electronic components especially if I were to use 12v which is higher than 9v, the default while 5v, might not enough juice at all.

When I took it out after using it (maybe after shut it down at least 10-30 seconds), I touched the heatsink and it was warm and I thought it maybe the voltage itself or the speaker's watt used.

On the electronic board, there's no label of voltage information at all. I also tried to search the internet, most of the topics were about getting the default 9v power supply rather than different than 9v.

Any advice on the power input for this one?

Photo : https://imgur.com/a/qtzK5vI

Thank you in advance.

Paul_KD7HB

Hi,

I have Altec Lansing 120i since 2006 and I am planning to add arduino and bluetooth into it. It has a bulky 9v 1A power supply from AC and the power supply's shell started to crack already but still usable.

What I am considering for is to get rid of that bulky power supply with maybe either 5v or 12v dc input but I am concerned that I might blow up the electronic components especially if I were to use 12v which is higher than 9v, the default while 5v, might not enough juice at all.

When I took it out after using it (maybe after shut it down at least 10-30 seconds), I touched the heatsink and it was warm and I thought it maybe the voltage itself or the speaker's watt used.

On the electronic board, there's no label of voltage information at all. I also tried to search the internet, most of the topics were about getting the default 9v power supply rather than different than 9v.

Any advice on the power input for this one?

Photo : https://imgur.com/a/qtzK5vI

Thank you in advance.
I have NO idea what an Altec Lansing 120i  is, but since the heat sink is warm, the 9 volt 1 amp supply is optimum for the device.

Now, what is it exactly you are wanting to do with an Arduino?

Paul

sarf2k4

Hi,

Here is the picture of the Altec Lansing 120i https://webshop.cashconverters.com.au/thumbnail/425x260/1822823-altec-lansing-120i-speakers-black-0.jpg

I wanted to add led that would act like a vu meter and planning to "leech" the power input from the board for the arduino and the bluetooth.

I touched again the thin heatsink after it got off at least 10 seconds, I think the temperature somewhere around 35'c.

Paul_KD7HB

Hi,

Here is the picture of the Altec Lansing 120i https://webshop.cashconverters.com.au/thumbnail/425x260/1822823-altec-lansing-120i-speakers-black-0.jpg

I wanted to add led that would act like a vu meter and planning to "leech" the power input from the board for the arduino and the bluetooth.

I touched again the thin heatsink after it got off at least 10 seconds, I think the temperature somewhere around 35'c.
What is wrong with using what you have? Most Arduino boards will run just fine at 9 volts. You can power your LED with 9 volts with a suitable series resistor. If you are wanting the Arduino to control the LED, that is also possible with a series resistor to limit current.

If you want to power your amp with 12 volts, go ahead, it's you equipment.

Paul

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