i am making a 5×2watts bluetooth speaker
pam8610
3s battery 11.1v
bluetooth module
7805.module
the question is , how to maintain constant 12v voltage ?
fully charged 3s battery with bms will generate more than 12v but it will drop .
pam8610
3s battery 11.1v
bluetooth module
7805.module
the question is , how to maintain constant 12v voltage ?
fully charged 3s battery with bms will generate more than 12v but it will drop .
Then why not use a PAM8406? Runs off 5v powerbank or phone charger.
I use these amp modules with bluetooth to good effect, and get days off a fully charged powerbank:
Nouvelle carte d'amplificateur numerique stereo double canal 5Wx2 Module d'amplification Audio PAM8406 amplificateur 5V classe D | AliExpress
This is the BT module from the same manufacturer:
MACGARSEN MP3 Bluetooth decodeur conseil 4.2 bricolage haut parleur Audio amplificateur de puissance panneau modifie Non destructif voiture recepteur Module | AliExpress
or another option that i'm trialling at the moment on a low power build.
Aiyima DC5V Amplifier CSRA64215 APTXLL Lossless Music Hifi Bluetooth 4.2 Audio Amplifier Receiver Board 5W*2|Amplifier| - AliExpress
i've sourced this chip from ICStation, Aliexpress and Amazon and this seems to work pretty good, not to mention if you are game you can customise the BT chip.
My setup so far is this, a step up module to 5v and run it off a singular 18650 battery, all being charged off a TP4056 BMS, which you just plug a usb into and charge off the wall when flat.
Aiyima DC5V Amplifier CSRA64215 APTXLL Lossless Music Hifi Bluetooth 4.2 Audio Amplifier Receiver Board 5W*2|Amplifier| - AliExpress
i've sourced this chip from ICStation, Aliexpress and Amazon and this seems to work pretty good, not to mention if you are game you can customise the BT chip.
My setup so far is this, a step up module to 5v and run it off a singular 18650 battery, all being charged off a TP4056 BMS, which you just plug a usb into and charge off the wall when flat.