Introduction: 20 Watt Stereo Amplifier-simple and Very Cheap

By Prabhat Tiwari
About: i'm a college going guy who lives in india.i like to make electric gadgets and play with them.with the little knowledge of electronics,i'm able to solve my problems and hope yours too!!

want to listen to your favourite music loudly,but dont have any powerfull amplifier??want to have self made music system???are you getting bored of nasty and useless mono sound from tv,music player,dvd??want to have a self made cool and rich sound stereo amplifier but dont wanna spend alot???then your on the right place!!!!

this is one stop solution for all your problems related to stereo amps!!!!

guys this is my first instructable and i am quite new to instructables website,so dont be harsh toward my instructable.

today im gonna tell how to build high quality,simple,and cost effective amplifier.

this amplifier gives 20 watt output sound(really very loud!!!!)

# sailent features of the amplifier

* this amplifier is of 2 channel-stereo type.it is based on IC TDA 2009 chip.

* this project cost for me was only 96rupees (under 2$ USD).

* very easy to build

* requires only basic electronic knowledge.

* very few components.

and MOST IMPORTANT -IT GIVES VERY SWEET AND HIGH QUALITY OUTPUT!!!!!!

please watch the video embeded in the last step to know the quality of the amplifier..

guys i have build this amp referring to the electric circuit website

http://www.eleccircuit.com/ic-amplifier-stereo-10w...

please refer this website for additional information.

credits for circuit and pcb layout goes to electriccircuit website.

Step 1: Components Required

this circuit requires very less components.

main component of the circuit is IC TDA 2009A.please refer the datasheet for additional information on the ic

COMPONENTS LIST-

1) ic tda2009a

2) CAPACITORS 2.2uf/25v X 2 pieces; 470uf/25v X 2 pieces; 22uf/25v; 0.1uf disc type X 3 pieces; 2200uf/25v X 2 pieces; 100uf/25v

3)RESISTORS- 1.2k X 2 ; 18 ohm X 2; 1ohm X 2

4) a audio connector wire of earphones 3.5mm

5) copper board for etching.

7) soldier gun and some logic

NOTE-the 470uf capacitor in the schematics is equall to the 220uf cap in the pcb layout,you can use either of them.

Attachments

Step 2: Hardest But Simple Step!!! ;)

we have to assemble the circuit as shown in the circuit diagram.

i have used a 6cm X 4 cm copper board.

just etch the circuit given on the board and drill the holes where the component have to be assembled.

Step 3: Assembly

we have to assemble the components into their places in the pcb.

now solder all the components in their places..DO NOT DRY SOLDER THE COMPONENTS .THEY WILL BE BURNT!!

attach the heat sink to IC before soldering it.this will prevent the ic from getting hot.

for heat sink i have used a L shaped piece of aluminium..

NOTE- the IC generates a lot of heat which has to be dissipated..here my heat sink is not enough large to dissipate the all heat generated...use the heat sink as large as possible.

Step 4: Supply, Input and Output

for input,i have used the old 3.5mm earphone audio input jack wire.

for output speakers- they should be atleast 15 watt rated speakers.

for output connection-to connect and disconnect the speaker i have used male/female AV connectors.

supply used here is of 15 volt 1.3A bench power supply.

if you dont have a proper supply.you can make it at home using ic 7815 regulator.google it for more information.also see the pdf file attached..

Attachments

Step 5: DONE!!!!

hurray!!! we have just made a nice and simple cost effective amplifier!!!!

the ic and heat sink can become very hot so do not touch them while operating.

I AM NOT RESPONSIBLE FOR ANY DAMAGE CAUSED DUE TO MISUSE AND MISHANDELING OF THE CIRCUIT!!!!

i have uploaded the video of this amplifier in work!!

thanx guys for reading my instructable and please VOTE for my instructable if you like it.