Homemade speakers and sound amplifiers for our animals | [how-to] [audio]



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Homemade speakers and sound amplifiers for our animals
Collecting questions for writing FAKs that you have ever had when working with TDA2822 and tda7050 microcircuits on assembling amplifiers for them, operating them, and everything you wanted to ask, but did not dare

Questions to leave either in this thread or in PM!
Thanks in advance for your understanding and participation! : thank_you:
FAK already written!Waiting for photos of your assembled amplifiers for placement in FAK.
For questions please come here, or in fact!
:savagemessiahzine.com:
FAQ on creating an amplifier for our devices

Post has been editedHanzo - 03.10.10, 09:43



Rep: (4)
Well, ladies and gentlemen, lay out sdes of photos of your developments (preferably with detailed diagrams).
The first went:
Here is the circuit diagram of the amplifier
Power supply: 8-15V
Power: with speakers 2 Ohms: 20 W; with 4 ohm speakers: 10 W
Attached Image

I think I drew a scheme that was more or less understandable, but just to explain:land (It’s literally NOT necessary to ground the common wire) minus power, minus loudspeakers, minus inputs and outputs, as well as everything on the diagram as several dashes of different size under each other. By the way, on the jack is the most extreme contact.

I took the speakers from the usual computer speakers.

Photo homemadeuntilI can not lay out (forgot at home). I will try to zapfat all this in the near future.



Rep: (4)
And here is the promised photo of the beta version (as long as there is no case and with a large battery (then I will be powered by a small 9-volt battery))
Attached Image

But the photo board separately
Attached Image



Rep: (5)
i900-vrn @ 10/31/2008, 4:04*
And here is the promised photo of the beta version (so far without a case and with a large battery (then I will be powered by a small 9-volt battery)) [attachment = "135685: SNC00161.jpg"]

and how long will this little battery last? : rolleyes:
based on 10 watts output power?
There are ready-made Chinese amps for little money on batteries.
is it worth to fuss?
and creativity is a great thing !!!



Rep: (4)
I made a battery of 12V from 3 batteries from mobile phones (900 mA / h). Holds four hours.



Rep: (31)
i900-vrn @ 11.11.2008, 7:09*
I made a battery of 12V from 3 batteries from mobile phones (900 mAh) ...

Such a "package" to charge the whole problem, because not everything is simple. With parallel / serial Li-ion batteries
the process of "correct" charge is no longer simple. Here a whole series of problems arise, and that
solve invented whole devices. In general, all this is available on the aircraft modeling forums, since exactly
there the strongest "battery packs" inhabit, not like the telephone "lepilla". Charge one by one - uncomfortable
and, again, disastrous for batteries in this operation. At one time I dealt with this problem, because
In the past, my PDA battery was just terrible - I had to get out of it.

Post has been editedrn9fal - 17.11.08, 07:13



Rep: (4)
Yes, the fact is that I am partially familiar with this kind of garbage, after all, a radio amateur with experience, but now I’m just lazy and I re-solder the battery before and after each charge (in series-parallel. At the same time, I removed controllers from ALL Akums). The circuit works from series-connected batteries without controllers, and it charges when connected in parallel under one controller. True, this is tedious and difficult. So there is an idea in the near future to make an additional circuit which automatically switches all this, i.e. controlled by charging connection)

Post has been editedi900-vrn - 17.11.08, 15:35



Rep: (497)
Here is an amplifier variant that is more powerful and simpler:http://www.alex-z.narod.ru/electro_amp_1.htm



Rep: (0)
LeXX-kiev, Well, you look here is given a compact portable version, but according to your reference below it is written:
ATTENTION! Use only with a power supply unit with a power of at least 200 W. Install the amplifier only when the system unit is disconnected from the mains. Electrical contact of the speaker wires with the PC case and other conductors is not allowed.



Rep: (497)
AimCube,
And to replace a BP of a computer with a compact battery?
For example, on the same as in topikstarter
_______________________________________

i900-vrn @ 10/31/2008, 1:04 PM*
But the photo board separately

Thermopath between mikrukha and radiator forgot

Post has been editedLeXX-kiev - 25.11.08, 02:22



Rep: (4)
LeXX-Kiev @ 11/25/2008, 2:20*
Thermopath between mikrukha and radiator forgot




It was only a trial version, there you can see in the photo I even just screwed the heatsink with threads. And right now, all the norm and thermal grease and a normal radiator and bolted and not tied. By the way, I made the speakers and only the normal case for the amplifier remained:
Attached Image


And here is a photo of my battery:
Attached Image



Rep: (0)
And a small amp (built-in) can be made? Or else my two little motorola speakers do not pull my animal (spoils the sound)



Rep: (4)
Built where? in a column or beast? if the column is completely realistic. If you can make such a small amp in the pda-vryatli, and besides, it will warm up + will be quite expensive (especially if on the MAX series mikruh (they are quite small)). Although everything is curled from your desire, opportunities, as well as the amount of empty space in the animal. All told purely IMHO



Rep: (0)
I would like a beast;) not very powerful;



Rep: (4)
Kolyan777 @ 3.12.2008, 17:21*
not too strong

Well, it can easily be even on a single transistor with a minimum of elements, so it will fit into the case. Good luck!



Rep: (0)
it's like? write in more detail which transistor and where to solder it: sveta:



Rep: (8)
Check out the creation
Chip (angler fish)
About 0.5 meters long
Weight about 4kg
2W power

Picture
Picture
Picture
Picture

So fell into the hands of the remains of the mafona (part with the grille from the speaker).
Successfully folded them like this - it turns out the head.
I think it is necessary to collect it somehow will Chip.
In her eyes it is clear that this is the creation of Audio Chip
For almost a year, he thought about how to stuff this creation, what to use
And how to fasten all this and what the torso wanted to do.

Such devices were available.
PDA Ipak2190,
yusb charger (homemade assembly of 4 AA batteries 2500 mAh),
bluetooth zip,
mp3 player

All this periodically required charging the most important thing somewhere all the time was gone ...
On ipak, the speaker is also rather weak.
I decided that it should be combined in one case.
So there will be an amp for the pda and charging.

As a result, in her wort, it contains:
LED backlight
chinese power supply
ULF stereo block (amp from the Chinese mafona-assembled from what came across),
3 speakers (two speakers-eyes, the third inside the head-on the bass),
put the switch to the choice of sound from the PDA / mp3 player,
charger for PDA (5V stabilizer block),
charger for bluetooth ZhiPiS (5V stabilizer block),
Accumulators from the radio 12v [for autonomous operation of the amp] (which the half-dead found them nezhalko)
charger for usb charger [for autonomous operation of a PDA]

Instead of a current-limiting resistor yusb of a charger, I had to put a light bulb in my mouth (now a weak light is out of my mouth)
There were already LEDs in the eye rings (so the eyes are red)
I needed to search for the light - it means there will be a fish-angler (deep-water predator)

The belly, part of the fins and tail had to be made from papier-mГўchГ© (newspaper + PVA glue)
Head made of plastic, cold welding and car putty.
tightness of the design is not provided

Because its weight is about 4 kg, it will not swim 100 pudof.

Within six months, a lot of design flaws were also found.
- bad cooling (Chinese transformer),
- fragility (it is impossible to drop, it is not metalic),
-plugs / fragile pda connectors (it would be much easier with miniUSB)
-small (toggle switch nowhere else to put),
Illumination is too small
-the capacity of the batteries is not enough (per amp),
-and lithium batteries do not like to sit long on the charge,
- heavy

Who can collect something without the listed lacks?

Attached images
Attached ImageAttached ImageAttached ImageAttached Image



Rep: (45)
alex2190 Fish is just a masterpiece!



Rep: (8)
i900-vrn

power amplifier on one transistor: D
I want to see it: rofl:

radio amateur with experience: D well, well
how much experience do you have for a month or two

First of all
take at least one normal electronic circuit
and show where there is land on it with several lines of different sizes under each other
the body is with one dash but there is no land,
do not confuse electronic circuits and power electrical circuits

Secondly
Power supply: 8-15V
Power: with speakers 2 Ohms: 20 W; with 4 ohm speakers: 10 W [/ u]
he came up with a fellow
but Che did not say then about the frequency response and nonlinear distortion at
This power is equal to 10% at which there will be some wheezing and cod

typical power on passport with Kni = 10%
4SM - 6W
3.2 Ohm - 7.5W
2О© - 10W
1.6 Ohm - 12W
The real working power of this microcircuit at which you can listen to it is 1-2W
Therefore, in Chinese tape recorders where it costs the speakers no more than 1-2 W

Thirdly
so if I draw capacitors in the circuit, then the voltage
point them to people so that they do not explode (16B)

in the fourth
I saw a power amplifier less working on 3 transistors
but one thing is probably a masterpiece can you draw
power amplifier consists of a matching stage
voltage amplifier and current amplifier is at least
plus feedback and correction circuits
I guarantee you on a microcircuit will be more compact

by the way here is a typical scheme of its inclusion
http://radiovek.boom.ru/Audio/5w.html

findings
for your efforts well done, but for knowledge zero
so go get the primer and teach the materiel and don't confuse the people

P.s. the radiator is a well done power, and then shook it with tape
around, what would he better cooled it too

Post has been editedawp_alex - 07.12.08, 17:32



Rep: (28)
awp_alex
You forgot to scold him for the battery. ;)



Rep: (8)
: rolleyes:

about batteries is another story

current if in short
charging 3 batteries through one controller is also a force
usually all schemes are calculated for preloading 1.5 times but not three times - the conclusion is obvious
Well for him it is certainly not scary because he has two more controllers in stock)))

parallel charging of batteries is also power
for this there are several conditions I doubt that they are respected
1) they must be the same capacity
2) the discharge level of all batteries must be the same
otherwise it turns out that one is charged and the other is not yet
or one was charged and the other was charged 5 hours ago (in the end, overcharging is not the best thing for them, especially since there is no controller)
3) Akum must have the same service life, preferably another company and model, otherwise the item above will be

All the above have a great effect on battery life and battery life.

oh well enough for now


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