Introduction: Portable Amplifier 10W for Cellphone, Etc

Picture of Portable Amplifier 10W for Cellphone, Etc

this is my first instructable.
PORTABLE AMPLIFIER 10W USING 9V 1100mAH BATERRY
, so please rate it :)

mine work great

Step 1: The Materials

Picture of The Materials

R1 : 6 Ohm
R2 : 220 Ohm
R4 : 10 KOhm pontesiometer
C1 : 2200 uF / 25V
C2 : 470 uF / 16V
C3 : 470 uF / 16V
C4 : 100 nF
IC1 : TDA 2003
Heatsink for TDA 2003
Female jack: 2
male jack :1
9v 1100mAH battery
case
PCB
swicth

Step 2: Step 1

Picture of Step 1

drill the case, and plug the male jack, female jack, swicth, potentiometer

Step 3: Step 2

Picture of Step 2

connect the components, and then solder them.
make sure them are correctly

Step 4: Step 3

Picture of Step 3

put the circuit at the case, and connect the male jack, female jack, swicth, potentiometer

Step 5: Finally

Picture of Finally

test it using 9v battery,
connect input jack to your phone, iPod, iPhone, cell phone, etc
connect output jack to headphone or speaker
rotate the potentiometer

mine work
i hope your own amplifier is work too

umm, sorry my english language, i'm indonesian

Comments

usbg3rd (author)2012-01-25

nice one
but
1-did you built the circuit on any simulation software?or just did it directly on the board
2-also that is this circuit from the datasheet? if not how did you manage to make it directly? please reply

Rendydevara (author)usbg3rd2012-08-15

1. no. i got this circuit from electronic-lab.com.
2. usually the circuit also can be found in the datasheet.

sorry for late reply

Rendydevara (author)usbg3rd2012-08-15

1. no. i got this circuit from electronic-lab.com.
2. usually the circuit also can be found in the datasheet.

sorry for late reply

SmoothTroopa (author)2012-03-15

Before constructing this i would like to ask a few questions.
1)Will this work with a 12v power source?
2)Can i use an AC power source with this amp?

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

Rendydevara (author)SmoothTroopa2012-08-15

sorry for late reply..
1. yes you can use 12v DC power source.
2. if you want to use 12v AC power source you have to use bridge diode. to convert from AC to DC.
but if you want to use 220v or 110v (or higher than 18v) you have to use an Adaptor. to convert from AC 220v or 110v to DC 12v.

to get more information. search on google TDA2003

denisjkasai (author)2011-08-14

Capacitor C3 is 470nf

955josiah (author)2010-11-25

can i use TDA 2030 transistor for that diagram??? plsss i need an immediately answer for that........

Rendydevara (author)955josiah2010-11-27

maybe work, but i've not try it if you are looking for the datasheet u can visit http://alldatasheet.com

jeffrey_om (author)2010-01-29

What for case do you use and why do you not a speaker in your case.

Rendydevara (author)jeffrey_om2010-02-05

i use cassette box.
because i want to listen on my headphone.

thanks for your respond :)

I'm sorry too long reply
 

theVader75 (author)2010-01-27

Can you put a better photo in how to wire to the jacks because or tell me how to wire the jacks because they have 3 contacts and on the IN and OUT are just 2 or tell me if is a mono amplifier.. please respond someone!

Rendydevara (author)theVader752010-02-05

 yeah, this is mono amplifier. and i only have stereo jack

thanks for your respond :)

I'm sorry too long reply

Berserk87 (author)2009-08-21

Nice guide but i think your math is wrong. In order for this to be a 10W amplifier, that 9V battery would have to be putting out 1.1 Amp, which im sure a 9V battery is incapable of delivering. Also the fact that the amplifier isnt going to be 100% efficient. :P I did a google search and found a couple people saying that a 9V battery can provide 150mA for around 3 hours, which would make this a 1.35W amplifier. Unless im missing something here (?) on a side note, could you post the schematic if you have it?

kikiclint (author)Berserk872009-11-20

I think 10 watts is the max that the chip can handle, were you to have a really loud input, and using the maximum voltages for the power supply. 

Rendydevara (author)Berserk872009-08-24

yes i can, R1 : 6 Ohm R2 : 220 Ohm R4 : 10 KOhm pontesiometer C1 : 2200 uF / 25V C2 : 470 uF / 16V C3 : 470 uF / 16V C4 : 100 nF IC1 : TDA 2003

Rendydevara (author)Rendydevara2009-09-24

oops down is DC - :)

Rendydevara (author)Berserk872009-08-22

yeah but, now i used 9.6V 1A battery.<br/>sorry i don't have the schematic, i got it from <br/><br/><a rel="nofollow" href="http://www.electronics-lab.com/projects/audio/016/">http://www.electronics-lab.com/projects/audio/016/</a><br/><br/>maybe later i want to make the schematic<br/>

lemonie (author)Berserk872009-08-22

Watts as applied to audio aren't the same, but I'm not going to try to explain it because I can't remember well enough myself. L

Berserk87 (author)lemonie2009-08-22

ok, i figured as much, ill go do a search on google for it.

lemonie (author)Berserk872009-08-22

I did once - a lot of maths in it if I remember... L

lofty (author)lemonie2009-08-22

rms Power = V2 / 2R
where V is the peak voltage and R is the resistance of the speaker.
so.... Prms = 81 / 8 (for a 4ohm speaker) = 10.125 Watts

rms Current = I / root(2) where I is the peak current
peak current = V/R = 9/4 = 2.25 A (for 4 ohms)
so... Irms = 2.25 / root(2) = 1.59 A

I think he has done his calculations right but is just using the wrong power supply. Obviously a 9V battery will not be able to source that amount of current for any length of time so if you try to turn up the volume to a point where the amp would be putting out 10Watts the sound will probably be very distorted because it can't deliver the power

Take a look at the datasheet for the amp anyways it's targeted at a car amp and a car battery can put out hundreds of amps.
But theres nothing wrong with using it as a portable battery powered amp, you just wont get the volume you would if using it in a car

Datasheet >> http://www.st.com/stonline/products/literature/ds/1449.pdf

Anyways nice instructable !
But a circuit diagram would be helpful for people who like to make their own PCBs or breadboard it first.

lofty (author)lofty2009-08-22

rms Power has come out wrong in my last comment.

should be = (V2) / 2R

lofty (author)lofty2009-08-22

OMG ! (Voltage squared) divided by (2 x R)

CaseBoy (author)2009-10-08

 i am trying to mack somthing like this cant u find a pair of head phones cut off the buds a replace them with a speaker????

torx (author)2009-09-22

A little error: the( +DC )to down on schematics is really (-DC).Great Instructable ,essential idea !I like!

Rendydevara (author)torx2009-09-24

haha oops, - DC is down, you are right thanks

zaketus (author)2009-08-22

Looking at the datasheet (http://www.st.com/stonline/products/literature/ds/1449.pdf) page 4 figure 3. Max output power with 9v power supply (lets think that battery's voltage is constant 9v) is 2-4.5W, when using load between 4ohm and 1.6ohm

Lets pretend there isn't any voltage drops:
9V = +4.5V and -4.5V.
P = U2 / R, 4.5V / sgrt(2) = 3.2V
3.2V 2 / 4ohm = 2.6W

Same with 18V power supply

18V = +9V and -9V
9V/sgrt(2) = 6.4V
6.4V2 / 4ohm = 10.2W

Little rounded numbers, but will do.

Someone correct me if I'm wrong with those calculations, but datasheet has "real" values on diagram.

Rendydevara (author)zaketus2009-08-22

thanks for your opinion :)

zaketus (author)Rendydevara2009-08-23

Anyway, your amplifier looks good and seems like it's size is perfect for portable applications.

Rendydevara (author)zaketus2009-08-24

thanks

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