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This VU meter can be used to do this. however this is not continuous. you can not get a continuous range from this circuit. However if you decide to divide your total resistance into 10 levels(you can increase and decrease this according to your need) and then depending upon these outputs you can connect transistors to activate different values of resistance in your second Amplifier.Let me know If something is confusing.
Kindly see this image, it is from the datasheet of LM317. It has a formula that can be used to calculate the ouput voltage for a given input voltage. Remember if your input is 12V you can never get 12V at the output (due to power losses) therefore in any PSU the input is higher than the required adjustable output. I haven't seen your schematics so I cant tell what is R1 and R2 but see this circuit for reference.
I cant find the exact values at the moment but the voltage should never exceed the supplied voltage, the peak value of supplied voltage is 36V so use 50V for each of the capacitors.
Yes, dual channel Amp can be made by making 2 different circuits of TDA2003. This will result in a 20Watt amp. so to power this amplifier your Current rating of the supply should be double as compared to 1 circuit. Ideally - for a 12V converter your current rating should be 1 Amp for 1 Circuiti.e. converter max output current should be 2 Amp for a dual channel amplifier.Moreover the datasheet specifies a peak current of 3.5A can be drawn from the battery Peak- for a 12V converter peak current rating should be 3.5 Amp for 1 curcuiti.e. converter max output current should be 7 Amp for a dual channel amplifier.ConclusionTo sum it up generally the amplifier works on a range in the middle of ideal and Peak values. So roughly around 12V-3Amp converter would be decent. however the more the Amp...
Yes, dual channel Amp can be made by making 2 different circuits of TDA2003. This will result in a 20Watt amp. so to power this amplifier your Current rating of the supply should be double as compared to 1 circuit. Ideally - for a 12V converter your current rating should be 1 Amp for 1 Circuiti.e. converter max output current should be 2 Amp for a dual channel amplifier.Moreover the datasheet specifies a peak current of 3.5A can be drawn from the battery Peak- for a 12V converter peak current rating should be 3.5 Amp for 1 curcuiti.e. converter max output current should be 7 Amp for a dual channel amplifier.ConclusionTo sum it up generally the amplifier works on a range in the middle of ideal and Peak values. So roughly around 12V-3Amp converter would be decent. however the more the Amps the better the beats will be as the beats tend to draw more current.
Sometimes you have to work around stuff.. If you look closely I myself cut a regular IC socket for lets say 6-8 pin IC in the middle and used that as a socket for 5 pin...
okay, I am not exactly sure what went wrong but lets figure it out. 1 - when u make a circuit did you solder the IC ? never do that If u did It might damage the IC. 2 - check all other components are soldered properly. 3 - before soldering did you perform the continuity test of the PCB? 4 - are you using a good quality power supply? i.e. is it capable of delivering about 2 Amp max current at 9V? 5 - If all the above is okay then i guess we have to debug the whole circuit individually component-wise.Check and reply about the above mentioned things and we will continue it further :)
Thanks for giving the heads up, In my country they are easily available and mostly they are working, unless someone burns the IC while soldering. and for the second part tda2003 has very less output power its around 10W i guess whereas tda2050 has 32W so it pretty much depends on the usability. I have made an amplifier using tda2003 quite a while ago if someone is interested check out my other projects you will be able to find it there.
LM2596 is feedback IC therfore I guess it should perform better but I haven't made any comparisons in practical so can't say for sure. Whereas it also depends upon the application if you are using it to power something that does not drain more current than 1A Lm78xx will do just fine. Moreover there are different versions of the same IC i.e. 2A version and so on. It all comes down to your application requirements.
Do give it a try :)
Ffeel free to correct them... :)
Feel free to correct them :)
Any USB powered amplifier can never have more power than 5W. Therfore they claim it to be 3W x2 but it will not be. secondly if you try to draw more power the controller shuts the supply to the usb Port or it can damage the port itself. Its your decision that do you want to buy a 5W amp or make a 10W one. One more thing you can buy ready made usb-powered speakers (In case you just want something to play on).
Do make sure that you dont draw more power than 5W form a USB port otherwise the USB controller will be damaged. Maybe that is the problem. You never solder IC directly on the board, always use an IC bed. Like you can see in the image I didnt have an IC bed so I used normal connectors. because when you are directly soldering IC in the board you might damage the IC with the heat from the soldering Iron. Another plus point is in case If your IC gets damage you can just pull the old one out and insert a new one without soldering or anything.
You can test it with a 9v battery too. or simply test with any car battery that is normally 12V. With 9V battery if you increase the volume the distortion will occur..You can get pre-build amps but they are not fun as I like to build my own stuff. USB power amps will never give you more than 5W output ideally.. it will be always less than 5W.
I stopped using facebook a long time ago. You can ask me anything here, Message me in my inbox I will try to reply if i could help :)
50 degrees is not that bad. Normally when the IC malfunctions the temperature is so hot that it burns your fingers when you touch it. I didn't quite understand what you told about lm386. correct me If I am wrong. lm386 is a very small amplifier basically your cellphone has more volume than lm386 amplifier, so I am not a big fan. Do you have a battery? 12V DC battery try that. Any power supply that you use has a noise that is added to the amplifier (50Hz noise). If there is no noise with 12V battery than that is the issue. Otherwise the capacitor pins check their soldering.
Hello again, Have you felt the IC does it heat up when u are using it, check carefully. and If possible try replacing the IC if the circuit still does the same than it is probably the circuit that is faulty. The amp definitely amplifies you can check it from the video link I gave above and worked for a lot of people. It is the same circuit that is given in the data sheet so that pretty much means it should work for you too..
Correct me If I am wrong, Are you trying to say that sometimes it works and sometimes it doesn't ? If that is the case it means that your soldering is not proper and some of the joints are lose. make sure everything is properly intact. Secondly it happened to me once that while soldering I kind of damaged the IC (Due to the heat from the soldering iron) when I replaced the IC it worked perfectly, as you can see afterwards in the final circuit I used an IC bed for inserting the IC just because I don't damage it again. plus IC bed is very convenient as if my IC gets damaged due to any other reason i can just replace it without soldering. I am currently unable to open my layout files, but the one I used is the same, I Just rearranged some of the components in the layout the connections how...
Correct me If I am wrong, Are you trying to say that sometimes it works and sometimes it doesn't ? If that is the case it means that your soldering is not proper and some of the joints are lose. make sure everything is properly intact. Secondly it happened to me once that while soldering I kind of damaged the IC (Due to the heat from the soldering iron) when I replaced the IC it worked perfectly, as you can see afterwards in the final circuit I used an IC bed for inserting the IC just because I don't damage it again. plus IC bed is very convenient as if my IC gets damaged due to any other reason i can just replace it without soldering. I am currently unable to open my layout files, but the one I used is the same, I Just rearranged some of the components in the layout the connections however are the same.Thirdly I didn't have the required resistance in the market so I used a parallel combination to achieve the results. make sure your RX, CX, R1 and R2 values are close to the one suggested. you can tune these values if there is any distortion in you amplifier (as IC's are not perfect in most countries).
Thank you :)Yes, you can connect a tone control with it.. In-fact with any amplifier.Tone Controllers (aka pre-Amps) are always applied at the input, as it is easier to handle signals with low amplitudes. The pre-Amplifiers voltage/Current ratings are very low, even If you find a Tone Controller for more power it will cost you way too much. Plus Tone controllers normally use filters due to which the signal strength decreases drastically so its used before the main amplifier. So to sum it up, you can use a tone control at the input of any amplifier. I have another Instructable that uses a tone control you can either use the pre-Amp I used in the link or any other. On How to connect the two see the link belowhttps://www.instructables.com/id/32W-Stereo-Audio-Amplifier/
I dont understand what are you trying to say so let me just tell what i think u are asking. u will never touch -22 with ground or it will short circuit and your battery might get fire/damage. There is no such thing as voltage. its always a voltage difference (which means if I have a 22V battery/Supply it implies that the positive terminal of the battery is 22Volts higher than the negative terminal) so If you want to generate -22V All you need to do is connect the Positive terminal of your battery with the ground of the circuit (Ground is generally at 0 Volts so) your negative terminal gets 22V lower than it (0 - 22 = -22V). Its just a perception of it. I repeat there is no such thing as negative voltage.
"can draw up to 3.5" is only in an extreme case. The IDEAL supply ratings should be voltage = 8 - 18V and the current = 3.5A.BUT always remember the IC will Never give you more than 12W output so whats the point of using a 3.5A supply? plus the whole point of this instructable is to make an amplifier, power supply is upto you people.I personally didnt wanted to buy a new power supply so used the one that i made already.
The issue is with supplies... try using a battery and there WONT b any distortion.. power supplies convert AC to DC and yet there is a little AC component left no mattter how many capacitors you use ... that is why there is distortion.. in high quality supplies it will be less but will be still there .. as you can hear it in the video link too.. but after that i used a lead acid battery and it worked like a charm.
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