Hi all, I'm a newbie in this area, and I want to learn more about it. So anyway, I'm trying to make a portable speaker with a Bluetooth module and Pam8610, a speaker driver (JBL Xtreme 2, 4 ohms - 20w). I power up the Pam86010 with an 8v power supply and the Bluetooth module with a 5v external power source. After playing around with the volume, there are a few problems:
1. When the volume reaches 3/4 of the volume bar, the sound drops at a certain part of the song.
2. Because of "1", I thought maybe power was the problem, so I increased the power from 8v to 9v, and the volume was more stable than before. But the amp got heated up.
3. After 5 songs, the amp was fried.
What should I do? Is it possible to create a portable speaker with my setup?
Thank all
1. When the volume reaches 3/4 of the volume bar, the sound drops at a certain part of the song.
2. Because of "1", I thought maybe power was the problem, so I increased the power from 8v to 9v, and the volume was more stable than before. But the amp got heated up.
3. After 5 songs, the amp was fried.
What should I do? Is it possible to create a portable speaker with my setup?
Thank all
Hmm…I’ve used a handful of different PAM8610 boards for various portable builds, but I’ve never had this problem. I DO know that the PAM8610 really likes to have at least 12v, so your 8v power supply might be an easy fix.
Can you post a photo of the board you’re using? The PAM8610 comes in a bunch of different packages (bare boards, boards with potentiometers, etc)
Ah, yeah I’ve used a handful of these exact boards. Here’s what I’ve found that might help you…
- They really like 12 volts; the difference between 9v and 12v is massive with this board.
- You said you’re losing volume at “certain parts of the song”; I’ll assume you meant bass? I’ve noticed that these boards CAN drop out dramatically in those situations. I’d heard of other users having the most important by adding a capacitor to the “input rails”, AKA strapping it to the positive and negative DC connections at the board, observing polarity +/- I tried using a small capacitor like this, and it did definitely improve the volume drop-out issue.
- Add a cheap aluminum heatsink to the amplifier chip on the PCB board. Makes a huge improvement in cooling.
Hope this helps, let me know!