19 Watts Simple Amplifier Circuit

 : Description

This is a 19 watt simple amplifier circuit diagram using IC LA4440 from Sanyo.It uses very less components other than the IC LA4440.A very high quality circuit with respect to its cost and ideal for beginners.

Here IC LA 4440 is wired as a bridge amplifier to deliver a 19 W Rms on a 4 Ohm speaker. The IC has built in thermal, over voltage and short circuit protection.The IC also incorporates a audio muting function,but that is not used here.

 : Notes .

• Use a 12 V DC power supply able to deliver at least 3A current . IC can with stand up to 25 volt , but I prefer it should not be nothing more than 16V.
• Don’t forget to fit a proper heat sink with IC.
• Assemble the board on a good quality PCB.Carefully understand the specifications of LA 4440 given below before proceeding
• Use a 4 Ohm speaker as load. 8 Ohm speaker can also be used but the power output will drop to half (9.5 W) .
• For stereo assemble two copies of the amplifier given here.

19 Watt Amplifier Circuit Diagram.

Digital audio control

This digital volume control has no pot to wear out and introduces almost no noise in the circuit. Instead, the volume is controlled by pressing UP and DOWN buttons. This simple circuit would be a great touch to any home audio project.

read the full article here : http://www.aaroncake.net/circuits/fuzz.asp

Guitar fuzz effect

Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well. The circuit is so compact that it can be built into guitars or amps that do not have built in fuzz to add that capability to the instrument. The circuit does not use much battery power, so a standard alkaline battery will last many years even with daily use.

See the article here : http://www.aaroncake.net/circuits/fuzz.asp

LM383 8 watt amplifier circuit

Here is the schematic for an 8 watt audio amp. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp

Part	Total Qty.	Description	Substitutions
C1	1	10uf Electrolytic Capacitor
C2	1	470uf Electrolytic Capacitor
C3	1	0.1uF Disc Capacitor
C4	1	2000uf Electrolytic Capacitor	2200uF
R1	1	2.2 Ohm Resistor	Anything Within 10%
R2	1	220 Ohm Resistor	Anything Within 10%
IC1	1	LM383 8 Watt Amp IC	ECG1232, TDA2002

Notes : 

1-IC1 MUST be installed on a heat sink.

2-C3 is for filtering and to prevent oscillation and should not be omitted.

3-The circuit can be built on a perf board, universal solder board or PC board, the PC board is preferred. I 4-built the circuit on a perf board and had to add a low value inductor at the input to prevent oscillation.

5-The circuit draws about 880 ma at 12 V.

6-By swapping the values of R1 and R3, you can turn this amplifier into a guitar amp with no preamp required.

7-If you can't find 2000uF, then replace C4 with a 2200uF unit.

8-If you add a 0.2uF capaciitor in series with a 1 ohm resistor to the output you can prevent oscillation of the circuit under certain conditions

Then , Enjoy your Sound amplifier ;) 

Eng. Mahmoud Almasri

LM386 Audio amplifier ckt

See the full article :
http://www.instructables.com/id/LM386-Audio-Amplifier/

LM741 Sub-woofer circuits

    LM741 general description:

    LM741 Subwoofer Filter and Low Pass Filter Circuit. The acoustics of converting a filter, there are many aspects of the economic viability of the more famous are baxandal filter low and high frequency filters and crossover Acoustic space is transformed into sub-domains, so that the Thursday Speakers. Applications, we offer a filter, the limits of the region to transform acoustic (20-20000Hz) in the region of 20-100Hz. The signal for a first high pass filter C1, C2, P1, which is  ndesirable level DC input. A lowpass filter consisting of R3, R4, C3 prevents frequencies above 10 kHz, which do not benefit from this design, and it would be that the instability and noise. The summary amp invert signal. The low Summary of the amplifier signals go to a second low-pass filter to prevent the frequency from the speakers. I decided, a second order, as this box with a closed place feature. If you have a circuit with a valve system, and then simply close the Wind (Roll a pair of socks and pick at the port / Wind), this will give you a sealed box instead.

LM741 amplifier diagram, circuit:

TDA2005 2X10w stereo amplifier

as we know, TDA series ICs give us a lot of chooses to build our amplifier circuit .

Today i chose TDA2005 to clarify it is circuit !

TDA2005 is a class B dual audio power amplifier specifically designed for car radio applications. Its high current capability (up to 3.5 A) and the ability to drive very low impedance loads (down to 1.6 ohms)-good for our uses in car- .

TDA2005 stereo  2x10 watt amp. 

TDA2005 bridge 20W amp.

To download TDA2005 Datasheet : Click here please !