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Step 2: Build the circuit

Picture of Build the circuit
Speakers 003.jpg
Speakers 004.jpg
Next step is to build the circuit. I used a TDA2822M amplifier and the schematic shown in its datasheet. You can choose to build your circuit with whatever amplifier IC you choose.

 
Im kinda new with audio electronics, im using a headphone wire that is cut at the end for the input and it has 4 wires, 2 gold and 1 red and 1 green, if i use the green and red as the L and R input, where do the 2 gold wires go to?
Im kinda new with audio electronics, im using a headphone wire that is cut at the end for the input and it has 4 wires, 2 gold and 1 red and 1 green, if i use the green and red as the L and R input, where do the 2 gold wires go to?
argil4 years ago
if it is ok if i plug this amp with a 220v?
man every thing will just fry up and you wont be able to use it but yes you can use a 12 adapter instead of 220v
man every thing will just fry up and you wont be able to use it but yes you can use a 12 adapter instead of 220v
Glenn781 argil4 years ago
no it runs on 18 to 4.8 v
ajervis3 years ago
will the amp still play clear if i dt use a 10k on one of the input? BTW i hooked up everything right and the quality was terrible...
ajervis3 years ago
how i make the input go to one audio jack since they have 2 input and output parts for the amp.
Blak Wolf4 years ago
The triangles are just parts inside the IC right?
the bold lines are ground, triangles belong to the IC
and do the thick black lines at the ends there mean they go to ground?
Blak Wolf4 years ago
This may be a totally dumb question, but what are the triangles in the diagram representative of?
Reki34 years ago
Please excuse me for being s bit uninformed on this, but what do you mean by 'RL'? What resistors can we put in, and is it still necessary with small voltages?
talha914 years ago
Hi,

I am just a Beginner with this from Pakistan so the thing is that I cant understand this one step 2... The graphical Diagram of the circuit can u just make it rough like by Hand so I can better understand this step...

I know i can manage to understand it latter on by reading some articles on Google about electronic Circuits but if u can just share one more picture using pen and paper without straight lines....
bmxlive5 years ago
hi, at this step are you trying to say that i can build the same circuit but with other IC amp chip? i saw in differents instructables that every different amp circuit has differents components with some exeption like 0.1 uF capacitor. I would like to use a LMN386 that i can find in my local store but im not shure if i choose to use others components like this structables it will work. I hope you can help me
RazorConcepts (author)  bmxlive5 years ago
This schematic won't work with the lm386, you will have to use the schematic from the lm386 datasheet.
 i just wanna find  the amp on my radio to try to plug the  the wires from my jack to play my ipod louder

what do u conect to the end of the 100uf capasitors
zachzach6 years ago
i need more specific instructions on what to connect to the IC, and where did you get your IC (TDA2822M)
RazorConcepts (author)  zachzach6 years ago
I got the IC as a free sample from the manufacturer.

Here is the datasheet:
http://www.st.com/stonline/products/literature/ds/1464.pdf
who's the manufacturer and how could i get a free sample?
You could get a free sample by becoming an R&D department manager for a major corporation. It is illegal to sample from companies when you claim to be something you're not - i.e. an interested company, or student when you are not the one you said - and to sell a sample (whether as a part of a larger end-circuit, or as a single component) or barter with it, since it is meant for research and is meant to be used and discarded.
It is not illegal for a company to send you a free sample, I have requested and was sent everything from IC sockets, op amps, audio amps, even three axis acceleration ICs. On every request for I stated I was a hobbyist and wanted the samples for personal use. Of the 30 odd samples I've requested, only 2 were not granted, one for LCD switches, the rep said they were too expensive at the time for non-comercial requests. The other was denied because I did not have a .com email address. If you are honest and polite you should have no problems getting free samples. Hobbyist have created many inovative uses for products the manufactures never thought of, opening new markets for existing products. A Win-Win for both companies and Hobbyists.
bo-jangles5 years ago
would this amp be okay for a: •400 Watt Total Pick Power Handling (200 Watt Each) •Impedance: 4 ohms Each