Instructables

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
 
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Step 1: The materials

Picture of the materials
FQL2VBEFYNTAF6U.MEDIUM.jpg
tda2003_pinout.gif
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 3: Step 2

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

Step 4: Step 3

put the circuit at the case, and connect the male jack, female jack, swicth, potentiometer
1-40 of 44Next »
usbg3rd2 years ago
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)  usbg3rd1 year ago
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)  usbg3rd1 year ago
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
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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)  SmoothTroopa1 year ago
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
denisjkasai2 years ago
Capacitor C3 is 470nf
955josiah3 years ago
can i use TDA 2030 transistor for that diagram??? plsss i need an immediately answer for that........
Rendydevara (author)  955josiah3 years ago
maybe work, but i've not try it if you are looking for the datasheet u can visit http://alldatasheet.com
jeffrey_om4 years ago
What for case do you use and why do you not a speaker in your case.
Rendydevara (author)  jeffrey_om4 years ago
i use cassette box.
because i want to listen on my headphone.

thanks for your respond :)

I'm sorry too long reply
 
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)  morphic cu ion4 years ago
 yeah, this is mono amplifier. and i only have stereo jack

thanks for your respond :)

I'm sorry too long reply
Berserk874 years ago
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?
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)  Berserk874 years ago
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
schematic amp 10w.bmp
Rendydevara (author)  Rendydevara4 years ago
oops down is DC - :)
Rendydevara (author)  Berserk874 years ago
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/>
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
ok, i figured as much, ill go do a search on google for it.
I did once - a lot of maths in it if I remember... L
lofty lemonie4 years ago
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 lofty4 years ago
rms Power has come out wrong in my last comment.

should be = (V2) / 2R
lofty lofty4 years ago
OMG ! (Voltage squared) divided by (2 x R)
CaseBoy4 years ago
 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????
torx4 years ago
A little error: the( +DC )to down on schematics is really (-DC).Great Instructable ,essential idea !I like!
Rendydevara (author)  torx4 years ago
haha oops, - DC is down, you are right thanks
1-40 of 44Next »