im currentley working on a 2x 20 watt amp using the tda 2003 its quite cheap to make and decent sound quality i dont know what its like with regular batterys but it runs for a good time on my drill battery
anyway heres the circuit diagram for it
anyway heres the circuit diagram for it
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Too much? Check this...!
http://www.diyaudio.com/forums/showthread.php?s=&threadid=104402&highlight=
http://www.diyaudio.com/forums/showthread.php?s=&threadid=104402&highlight=
lejaybo said:howdy peoples
i wanna make a simple ghetto blaster style portable system
doesn't have to sound the greatest but i'm looking for a simple amplifer that'll run of batteries
plus has anyone played with dab tuners?][;p
Parts Express has a sale on a T-amp (today only?). Sounds pretty decent and is pretty efficient.
What battery type do you plan to use? What voltage?
I just got some TDA7267 ICs. After doing careful tests with my oscilloscope and function generator, I found it to deliver 1.8 watts (non clipping) into a 5 Ohm load with a 9 volt Vs. This is very good performance for a single ended output IC. It requires very few components.
I just got some TDA7267 ICs. After doing careful tests with my oscilloscope and function generator, I found it to deliver 1.8 watts (non clipping) into a 5 Ohm load with a 9 volt Vs. This is very good performance for a single ended output IC. It requires very few components.
cool info guys
i'm thinking roughly to use 9 to 12 volts
AA tyes me thinks, something thats easily avaiable
the best power i can get for this power is my aim
plus i know it'll sound a bit better than those plastic crapola boombox i keep seeing
anyone seen quad channel IC ?
i'm thinking roughly to use 9 to 12 volts
AA tyes me thinks, something thats easily avaiable
the best power i can get for this power is my aim
plus i know it'll sound a bit better than those plastic crapola boombox i keep seeing
anyone seen quad channel IC ?
With AA cells you'll never get enough volume for outdoor use.
You want something that can deliver greater current.
If you are up to the complexity of the charger design, I suggest using Lithium Ion cells. (The type used to re-cell laptop batteries.)
Or the Li Polymer cells used by model aircraft builders. (Costs more.)
Additionally, if you care about battery life, a class D design will make a very big difference.
You want something that can deliver greater current.
If you are up to the complexity of the charger design, I suggest using Lithium Ion cells. (The type used to re-cell laptop batteries.)
Or the Li Polymer cells used by model aircraft builders. (Costs more.)
Additionally, if you care about battery life, a class D design will make a very big difference.
A really good chip quad IC for battery power (12 volts ideally) is the TDA7375.
4 seperate channels, and each channel can be bridged for 2 channels with a lot more power.
You can create your 12 volts with a gell cell.
can put 35 watts into two speakers.
Have a read of this.
http://pdf1.alldatasheet.com/datasheet-pdf/view/25150/STMICROELECTRONICS/TDA7375.html
4 seperate channels, and each channel can be bridged for 2 channels with a lot more power.
You can create your 12 volts with a gell cell.
can put 35 watts into two speakers.
Have a read of this.
http://pdf1.alldatasheet.com/datasheet-pdf/view/25150/STMICROELECTRONICS/TDA7375.html
With AA batteries, even the the single ended amps will run them down quite a bit after just an hour or two of listening with 4 ohm loads at high volumes.
While bridge amps can make 4x the power of single ended, they will run even D cells down quickly.
I recommend a single ended amp with efficient speakers. I used guitar speaker once and the setup was screaming loud, even at 1 watt. Sound may not be hifi, but it was better than most off the shelf boom boxes.
While bridge amps can make 4x the power of single ended, they will run even D cells down quickly.
I recommend a single ended amp with efficient speakers. I used guitar speaker once and the setup was screaming loud, even at 1 watt. Sound may not be hifi, but it was better than most off the shelf boom boxes.
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