So...forgive me for being dumb with certain terms but im no techy when it comes to circuits! can make them etc but struggling to learn the basics of reading the schematics, great at following but not so much reading it and working it out myself (blown up a few items ha!)
But this is what i need to do, ive built a dock, i want to make a better amp for it as it just isnt loud enough for what i want, tried looking into the gain on chip amps but just am not getting anywhere at the mo and its like no one seems to know the simple way its all "read the schematic" ye i did that, R i know means resister but i can read them so ive no idea what im doing XD
So i managed to get my hands on a little amp, the TDA2822m and i decided to use this as a tester on my first build of a IC amp
However...again i cannot read schematics lol so could someone help in terms of...is there something i can use that can help me understand them abit better? i will be building it on a breadboard if that helps!
Also could anyone suggest a good IC amp thats clear and loud and runs from a li-poly battery
But this is what i need to do, ive built a dock, i want to make a better amp for it as it just isnt loud enough for what i want, tried looking into the gain on chip amps but just am not getting anywhere at the mo and its like no one seems to know the simple way its all "read the schematic" ye i did that, R i know means resister but i can read them so ive no idea what im doing XD
So i managed to get my hands on a little amp, the TDA2822m and i decided to use this as a tester on my first build of a IC amp
However...again i cannot read schematics lol so could someone help in terms of...is there something i can use that can help me understand them abit better? i will be building it on a breadboard if that helps!
Also could anyone suggest a good IC amp thats clear and loud and runs from a li-poly battery
https://learn.sparkfun.com/tutorials/how-to-read-a-schematic
https://learn.sparkfun.com/tutorials/how-to-use-a-breadboard
The TDA2822m is not Class-D, so maybe the wrong forum.
https://www.youtube.com/watch?v=9cps7Q_IrX0
https://www.youtube.com/watch?v=TGMj5Yo67WY
https://learn.sparkfun.com/tutorials/how-to-use-a-breadboard
The TDA2822m is not Class-D, so maybe the wrong forum.
https://www.youtube.com/watch?v=9cps7Q_IrX0
https://www.youtube.com/watch?v=TGMj5Yo67WY
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Thanks for the input guys, sorry for being dumb im going to google what a pre-amp is as ive actually no idea?
one thing i did read was something about a bridge although again ive no idea what they are?
One way i can increase the loudness is when i plug my dock into my pc speakers, im able to really turn it up then (due to the pc speakers volume control lol) part of the reason i know it can handle it and obviously knowing the speakers are more than 3 watts
i didnt actually know what type of chip the tda2822m was i just managed to get my hands on it and felt it would be good to learn with!
Those videos were exactly what i was looking for what a help! thank you!
but i would ask this, could someone point me in the direction of a program which may help me that i can put say schematics into and get an outcome of what it may do? i have downloaded one called fritz but haven't actually used it yet...
Say like a simple build that i could do on a breadboard (btw why isnt there anyone online XD)
Cheers again!
one thing i did read was something about a bridge although again ive no idea what they are?
One way i can increase the loudness is when i plug my dock into my pc speakers, im able to really turn it up then (due to the pc speakers volume control lol) part of the reason i know it can handle it and obviously knowing the speakers are more than 3 watts
i didnt actually know what type of chip the tda2822m was i just managed to get my hands on it and felt it would be good to learn with!
Those videos were exactly what i was looking for what a help! thank you!
but i would ask this, could someone point me in the direction of a program which may help me that i can put say schematics into and get an outcome of what it may do? i have downloaded one called fritz but haven't actually used it yet...
Say like a simple build that i could do on a breadboard (btw why isnt there anyone online XD)
Cheers again!
The two simulation programs that the majority use are 'LTspice' (click my signature line to see how that works) and 'Tina':
https://e2e.ti.com/blogs_/b/analogw...-free-simulator-tool-make-amplifier-sims-easy
A preamp is simply a small voltage amplifier stage to boost the level of small 'line level' signals. Its easy to make one with as much or as little gain as you want.
https://e2e.ti.com/blogs_/b/analogw...-free-simulator-tool-make-amplifier-sims-easy
A preamp is simply a small voltage amplifier stage to boost the level of small 'line level' signals. Its easy to make one with as much or as little gain as you want.
The TDA2822 wouldn't be a great choice tbh because it is more of a power amp (albeit a low power one) than a true small signal device. The problems would be noise (hiss) and also far to much gain.
What you need is an 'opamp' and there are dozens of suitable ones such as the TL072 and NE5532. They cost peanuts and only need a few resistors per channel to work.
What you need is an 'opamp' and there are dozens of suitable ones such as the TL072 and NE5532. They cost peanuts and only need a few resistors per channel to work.
ok, so can i have a suggestion on a good amp? im currently using a pam something chip in the speaker dock but it just isnt loud enough..hench why i thought can i use another amp to increase its volume.
so much info!
you have to remember im powering this from a li-poly battery so thats like 3.7v?
so much info!
you have to remember im powering this from a li-poly battery so thats like 3.7v?
Last one for tonight
3.7 volts puts very severe limits on things because that is the only voltage that is available to 'put across' the speaker by the amplifier.
That is your limiting factor. You need more voltage from the power supply to get more power. This is why many amplifiers run on such high voltage supplies, perhaps 100 volts in total.
You need more voltage
3.7 volts puts very severe limits on things because that is the only voltage that is available to 'put across' the speaker by the amplifier.
That is your limiting factor. You need more voltage from the power supply to get more power. This is why many amplifiers run on such high voltage supplies, perhaps 100 volts in total.
You need more voltage
So thought i would chime back in with my progress...so!
I managed to make a small amp using the TDA2822m, was shoddy as hell XD didnt even use correct parts i used what i had on hand, but either way it was a valuable learning curve for me! i certainly feel more confident than what i did a few days ago,
I managed to follow a schematic and hook it up! very proud
still i guess it sounded horrible due to the parts i used but at least now i feel i can buy correct parts and actually build a decent one!
So anyone have any suggestions on which ic is best for me to use? or should i start a new thread for this? cheers again chaps!
I managed to make a small amp using the TDA2822m, was shoddy as hell XD didnt even use correct parts i used what i had on hand, but either way it was a valuable learning curve for me! i certainly feel more confident than what i did a few days ago,
I managed to follow a schematic and hook it up! very proud
still i guess it sounded horrible due to the parts i used but at least now i feel i can buy correct parts and actually build a decent one!
So anyone have any suggestions on which ic is best for me to use? or should i start a new thread for this? cheers again chaps!
I wouldn't say there was a best, it really depends on your requirements.
A TDA2050 and handful of bits will make you a very good little amp. You would need a small heatsink for the IC.
And there are kits. A couple at random:
VELLEMAN KIT - K4001 - 7W AMP | CPC UK
CEBEK - E-16 - 5W POWER STAGE MODULE+PRE-AMP | CPC UK
A TDA2050 and handful of bits will make you a very good little amp. You would need a small heatsink for the IC.
And there are kits. A couple at random:
VELLEMAN KIT - K4001 - 7W AMP | CPC UK
CEBEK - E-16 - 5W POWER STAGE MODULE+PRE-AMP | CPC UK
Thanks however, i will be powering a small speaker dock i made
So im leaning towards a class D amp which i shall power via 5v "usb" power so to speak!
The battery setup im using can give 5v at 1000ma so i guess thats a good thing...
either way i have looked at two chips, the lm386 and the pam8403a
however i do not know which is better suited for my setup, currently the amp i actually use it the pam8403a but it just isnt loud enough and a board that is premade, not mine!
i will continue my research, but would a opamp be a usefull thing to use here?
So im leaning towards a class D amp which i shall power via 5v "usb" power so to speak!
The battery setup im using can give 5v at 1000ma so i guess thats a good thing...
either way i have looked at two chips, the lm386 and the pam8403a
however i do not know which is better suited for my setup, currently the amp i actually use it the pam8403a but it just isnt loud enough and a board that is premade, not mine!
i will continue my research, but would a opamp be a usefull thing to use here?
With 5V power supply I don't think you can hope for anything much louder than the pam8403 you already have. You could try one of the cheap TPA3116 or TPA3118 boards, they should work on 5V, but don't expect anything near the declared output power... which is optimistic at best, with maximum voltage the chip can take (50W with 21V power supply for TPA3116D2 with 4 Ohm speakers, according to datasheet).
Running on 5V, my guess is about 3-5W max, depending on speakers.
If you want anything louder, you'll have to increase the voltage, as others have already said.
As for LM386, I think it will suck your battery much sooner than one of the TPA class D amp boards...
The thing is, you have several constrains: first, the voltage (5V), and second, the battery capacity you are using (1000 mAh?). That's really not much, even for pam8403, let alone LM386...
You should either use the pam8403 and realize it can't be much louder than that, or reconsider the whole project and use a larger battery with higher voltage and better capacity (5.000-10.000 mAh). Then you could use another chip, which would go louder....
Sorry i didnt make that very clear thats how much the battery can give, 1000ma (re purposed battery charger) its capacity is 3000mah,
I know that people have linked lipo batteries together to produce more voltage, it is something i thought about doing however i feel i am not techy enough yet to be able to do it, something id like to test as i do have alot of salvaged parts!
Something worth doing? im unsure i look at the likes of beats pill and think about how loud they can go (terrible base way to much in my eyes) but still!
So if you could suggest something with regards to that im all ears! im also into learning something new why not! im of to maplins to buy a bunch of parts and start experimenting!
I know that people have linked lipo batteries together to produce more voltage, it is something i thought about doing however i feel i am not techy enough yet to be able to do it, something id like to test as i do have alot of salvaged parts!
Something worth doing? im unsure i look at the likes of beats pill and think about how loud they can go (terrible base way to much in my eyes) but still!
So if you could suggest something with regards to that im all ears! im also into learning something new why not! im of to maplins to buy a bunch of parts and start experimenting!
Its pretty much as den_hr says. You can't get something for nothing with regard to output power and a low supply voltage.
Class D which usually uses a bridge type configuration will get you the most output but its still very little. An LM386 on 5 volts is a non starter other than for educational use. You would get around 400mw rms into 4 ohm running that on 5 volts.
Class D which usually uses a bridge type configuration will get you the most output but its still very little. An LM386 on 5 volts is a non starter other than for educational use. You would get around 400mw rms into 4 ohm running that on 5 volts.
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