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enotik500
09.04.10, 21:19
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Amplifier design FAQ
Amplifier design FAQ | Homemade speakers and sound amplifiers

Note: a sample instruction for assembling an amplifier on Burr-Brown OPA microcircuits ishere.
The fundamental difference between the chips in this FAQ:
TDA2822m - for speakers ;
TDA7050 - headphone .

TDA2822m based amplifier
general form
Attached Image
pin layout (chip marking up)
Attached Image
chip parameters
stereo power on
Attached Image
bridge start
When the bridge is switched on, only the output power changes:
Attached Image

typical switching circuit
stereo
Attached Image
pavement
Attached Image

visual scheme
Attached Image
Yellow circles with a black symbol - the place to connect the speakers
Gray circles with a yellow symbol - signal input
Pink circles - the place where the wires are connected (wire crosses without a pink circle - this is a wire cross: there is no need to connect them!)
This scheme can be assembled as a mounted installation, and on the board. For this we need the following details:
ChipTDA2822m - 1 PC.
Resistor10 kΩ - 2 pcs.
Resistor4.7 ohms - 2 pcs.
Electrolytic capacitor100 uF 16 V - 2 pcs.
Electrolytic capacitor470 uF 16 V - 2 pcs.
Electrolytic capacitor10 uF 16 V - 1 PC.
Ceramic non-polar capacitor0.1 μF - 2 pcs.

However, the scheme can work with a minimum set of radio components:
Electrolytic capacitor100 uF 16 V - 2 pcs.
Electrolytic capacitor470 uF 16 V - 2 pcs.

When assembling, let's say a small deviation from the tabular values ​​of parts according to the rule “more is better” (say, instead of a capacitor of 470 microfarads, put 1000 microfarads).
If after assembly the amplifier wheezes - check the correctness of soldering, supply voltage, input power (is the input volume too loud?)
With proper assembly and serviceable radio components, the amplifier can not work. Capacitors have polarity, pay attention to how they are soldered!
TDA7050 based amplifier
general form
Attached Image
pin layout (chip marking up)
Attached Image
chip parameters
Attached Image
typical switching circuit
stereo
Attached Image
pavement
Attached Image

visual scheme
stereo
Attached Image
pavement
Attached Image

Yellow circles with a black symbol - the place to connect the speakers
Gray circles with a yellow symbol - signal input
Pink circles - the place where the wires are connected (wire crosses without a pink circle - this is a wire cross: there is no need to connect them!)
This scheme can be assembled as a mounted installation, and on the board. For this we need the following details:
ChipTDA7050 - 1 PC.
Electrolytic capacitor100 uF 16V - 2 pcs.

When assembling, let's say a small deviation from the tabular values ​​of parts according to the rule “more is better” (say, instead of a capacitor of 470 microfarads, put 1000 microfarads).
If after assembly the amplifier wheezes - check the correctness of soldering, supply voltage, input power (is the input volume too loud?)
With proper assembly and serviceable radio components, the amplifier can not work. Capacitors have polarity, pay attention to how they are soldered!


Post has been editedBlack fish - 21.01.16, 18:00
Reason for editing: Added link to BB
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enotik500
01.05.11, 21:03
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Maverick1968 @ 05/01/2011, 00:26*
the error in the figure ...

Hey. open your eyes wide and see where the batteries go, and where the output to the speakers is drawn. : censored:: butcher:


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enotik500
10.04.11, 22:28
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seomm
this is normal, do not worry.


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enotik500
17.03.11, 00:26
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man
the Chinese are the Chinese, it would be too expensive for them to manufacture. Damn it knows sho they do there, but it's a fact!


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enotik500
16.03.11, 21:56
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ohotnik94,
"lacking" or "saving" elements inside the body} -)


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enotik500
14.03.11, 13:55
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Let me remind you again that with 4 Conderare working perfectly Not all 2822! To guarantee the result, collect the complete scheme.


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enotik500
26.12.10, 14:40
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K
Cleaned the topic.

:savagemessiahzine.com:


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enotik500
10.12.10, 00:49
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foxy41,
read there is an explanation somewhere saw.


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enotik500
09.12.10, 23:33
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enotik500
09.12.10, 23:07
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foxy41,
No, there is a bridge for themselves, look through the topic ..


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enotik500
09.12.10, 20:25
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foxy41,
skis do not go. There is a topic, look again and carefully.


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enotik500
01.12.10, 20:02
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Anton22,
Ento gable?
Picture
so is ithere


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enotik500
20.11.10, 20:49
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schokk_2009
not even a hiss in the speakers? can not be!


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enotik500
17.11.10, 22:41
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man
damn, and what I wrote about on the last page? gut simply: rofl:


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enotik500
16.11.10, 14:11
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pasha_550
Yes, but it was said about the amplifier;)


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enotik500
13.11.10, 17:49
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GaD_NV,
You can try to make a broadband amplifier for the frequency of the gsm, but neither the shielding nor the power supply due to a portable device will be difficult to obtain, a stationary design is another matter ....


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enotik500
13.11.10, 17:24
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pasha_550
nothing personal but vobscheto says aboutamplifier for GSM ...


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enotik500
13.11.10, 10:22
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GaD_NV,
possible, but of proper quality with self-made and acceptable sizes with acceptable food never get = (


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enotik500
04.11.10, 15:23
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man
: lol:


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enotik500
24.10.10, 12:22
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Sanis,
then the signal filter ...... need to look!


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