Simple stereo amplifier schematic

Modest power audio amplifiers for driving small speakers or other light loads can be constructed in a number of ways. The first choice is usually an integrated circuit designed for the purpose such as the LM or newer class D switching types that often accept digital data instead of simple audio voltage. Discrete designs can also be built with readily available transistors or op-amps and many designs are featured in manufacturers' application notes. Older designs employed audio interstage and output transformers but the cost and size of these parts has made them all but disappear.

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Content:

• LM386 Audio Amplifier Circuit
• 150 Watt Amplifier Circuit – DIY Guide to Build Amplifier
• Simple 50 Watt Power Amplifier Circuit
• 3 simple audio amplifier circuit diagram
• Single Transistor Amplifier Circuit
• 108+ Power amplifier circuit diagram with PCB layout
• How to Build Small, Simple Audio Amplifiers Using IC LM386
• This Stereo Amplifier Is Simple To Make
• Simple 24W 12V Audio Amplifier Using TDA1516BQ IC

WATCH RELATED VIDEO: Simple Basic Audio Amplifier Circuit Using NPN Transistor.

LM386 Audio Amplifier Circuit

This is circuit diagram of powerful audio amplifier. This circuit is given by Emmanuel. In this circuit one ic and 4 Power transistors are used with some discrete components. Use 20v-to 60v for operating this circuit. This is a single channel audio amplifier circuit. Use capacitor of minimum 50v value. R1 is the variable resistor potentiometer for volume control. This vol. Use Big size speaker with this circuit. In image of assembled kit there is no 5w resistor connected.

The circuit shown is a block diagram, not a schematic. The inputs and outputs of the opamps are not shown and the collectors, emitters and bases of the transistors are not shown. An important capacitor between the positive and negative power supply pins of the IC is missing. Diodes or a transistor to bias the output transistors into class-AB is also missing then there is severe crossover distortion.

The volume control is wired backwards and shorts the signal source. The transistors are not connected as a Darlington, they are simply paralleled, why? Hey, the amplifier has no specifications about its output power or distortion, the impedance of the speaker is also missing. The datasheet for the RC by Texas Instruments recommends a maximum supply of plus and minus 15V then why does this circuit have supply voltages that are twice too high? With a plus and minus 15V supply, the maximum output voltage swing of the opamps is plus and minus Then the output power is only 7.

I made a proper schematic of this nightmare of an audio amplifier showing everything wrong with it:. This diagram was given by one user that used already this circuit at home by implement from This diagram. Which inverter circuit is wrong , please tell me , I will checked and modifiy. This diagram is given by one user that used already this project at home by implement from This diagram. Which inverter circuit is wrong , please tell me , I will check and modify. Here is another Circuitspedia circuit that has serious errors.

Also, its text says to use a 3V to 6V supply but the datasheet for its LM says that its minimum supply is 4V or 5V. This Inverter circuit is given from a trusted youtube channel on the robotics. He is showing in video on breadboard using this circuit. As name this is a simple inverter, so how this can powerful and regulated???? Your corrected circuit is correct but my circuit is not wrong. You talk about adding a resistor to make the transistor amplify but it reduces the signal and you do not say the value of the resistor.

Of course it will not amplify if the resistor value is calculated wrong. What value did you use for the added collector resistor? The inverter was completely wrong but my corrections with the Mosfets is also completely wrong because both conduct at the same time.

The original circuit will produce a low output power with the PNP shown as an emitter-follower without the NPN transistor working. The CD has two outputs that have opposite polarities to drive the same kind of transistor on each output. The transistors are used as switches instead of as emitter-followers.

Didn't you look at the datasheet of the LM that says its minimum allowed supply is 4V to 5V, not 3V? Maybe you are lucky to find one that works at 3V but its output power will be extremely low.

That transistor itself is not required, LM will amplify mic input while in high gain mode 1and 8 connected with capacitor. The output of the voltage regulator and positive supply for the LM and Arduino all need a capacitor to ground to prevent oscillations. Capacitor is present on board, forgot to draw in the plan Scrooj, that's my neopixel controller board, I made board first schema very recently. Are there any real ones that have been made. You can post now and register later.

If you have an account, sign in now to post with your account. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. Share More sharing options Followers 0. Reply to this topic Start new topic. Recommended Posts. Aman bharti Posted September 18, Posted September 18, In image of assembled kit there is no 5w resistor connected for more Amplifier circuit click here. Link to comment Share on other sites More sharing options Posted September 19, I made a proper schematic of this nightmare of an audio amplifier showing everything wrong with it: EDIT: The same website Circuitspedia has an inverter circuit that is also completely wrong.

Aman bharti Posted September 19, No Direct supply given on ic. Posted September 20, Aman bharti Posted September 20, In text also advised to use minimum of 1 A Transformer, not only 1 A Your corrected circuit is correct but my circuit is not wrong. An inverter uses a voltage sensor and negative feedback for voltage regulation. Here is a simple inverter with a CD oscillator and Mosfets:.

Posted September 24, Its my amp. Posted October 1, Posted October 2, Aman bharti Posted February 22, Posted February 22, Posted April 9, Join the conversation You can post now and register later. Reply to this topic Go to topic listing. Sign In Sign Up.

150 Watt Amplifier Circuit – DIY Guide to Build Amplifier

There are many simple audio amplifier circuit diagrams using a transistor. Currently, ICs has been used in many audio amplifiers, especially small circuit. It is convenient to use transistors. But when you need to use transistors, it has several advantages, such as saving you can take old equipment come to made small circuits easier than the IC. This circuit can apply to signal sound source that has low impedance, such as from ohm size loudspeakers or telephone earphones that use to replace Microphones. If using a loudspeaker replaces the rapidity will enough in sound checking that has been born from walking. The output can feed reach input of high power amplifier the other next.

Simple 50 Watt Power Amplifier Circuit

If you want to built simple audio amplifier without messy components then you can construct simple single transistor audio amplifier circuit using BC and Resistor, Capacitor. This circuit can drive 8 ohm loud speaker and produce considerable sound. Apply 9 Volt DC supply for better result. Two types of single transistor audio amplifier circuit designed with BC transistor, here first one is for to amplify direct audio signal and another one is for to amplify audio signal from condenser MIC as a preamplifier. To construct Amplifier circuit start with Transistor BC and Connect proper bias to Collector, Base and Emitter terminals, For the first circuit Loud speaker is directly connected to the transistor collector terminal and for Preamplifier circuit speaker connected through coupling capacitor C2. Input Audio signal for the second circuit is applied from the Condenser MIC and it may raw electric audio signal with distortion and noise in order to improve the audio signal we need to filter and amplify the input signal. To give strength to the MIC signal R1 resistor is connected at the input to Vcc and C1 capacitor is responsible for removing distortion and coupling audio signal to transistor BC Base.

3 simple audio amplifier circuit diagram

Also, use the search box on the top right. Note: Before you will buy the parts and build the circuits. Please check and learn more. Some circuit is not a suitable beginner.

Single Transistor Amplifier Circuit

For hobbyists and music lovers who are interested to get more audio power from a simple amplifier circuit, here we present this watt power amplifier circuit capable of delivering overloaded w RMS over a load of 8 ohms, and over watts with 4 Ohm speakers. The proposed amplifier circuit uses complementary transistors to achieve the intended high power with Hi-Fi quality. Most of the incorporated transistors barring the BCC must be mounted on the heatsink, which must be prferably fixed over one of the sides of the cabinet to facilitate proper dissipation. The diodes marked A, B and C are 1N and these too must also be mounted on the heat sink but with thermal grease. The music fed to the amplifier input must be 1Vpp standard line.

108+ Power amplifier circuit diagram with PCB layout

Practical Audio Amplifier Circuit Projects builds on the introduction to electronic circuits provided in Singmin's innovative and successful first book, Beginning Electronics Through Projects. Both books draw on the author's many years of experience as electronics professional and as hobbyist. As a result, his project descriptions are lively, practical, and very clear. With this new volume, the reader can build relatively simple systems and achieve useable results quickly. The projects included here allow a hobbyist to build amplifier circuits, test them, and then put them into a system. Progress through a graduated series of learning activities culminates in unique devices that are nevertheless easy to build. Learn the basic building blocks of audio amplifier circuit design and then apply your knowledge to your own audio inventions. Targets the intermediate to advanced reader with challenging projects that teach important circuit theories and principles Provides a ready source of audio circuits to professional audio engineers Includes an electric guitar pacer project that lets you "jam" with your favorite band!

How to Build Small, Simple Audio Amplifiers Using IC LM386

I built about a dozen different audio amplifier circuits with the LM but most of them had way too much noise, popping, and other interference. I added a bunch of extra capacitors to reduce the noise, and I added a bass boost control as well to make it sound even better. But before we start building, it might be helpful to get a little background information first….

This Stereo Amplifier Is Simple To Make

RELATED VIDEO: How To Make Stereo Amplifier Circuit By Using all-audio.pro Mosfet Amplifier...

An audio amplifier is an Electronic circuit that amplifies low-power audio signals to a level suitable for driving Loudspeaker. These Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds. There are many classes of Amplifiers and we have previously built a lot of Audio Amplifier circuits ranging from small 10W amplifiers to heavy W Power amplifiers. In this project, we are going to build an Audio Amplifier using TDA IC which is a very popular dual-channel audio amplifier commonly used to build high power audio amplifiers.

Simple 24W 12V Audio Amplifier Using TDA1516BQ IC

This is the cheapest Watt amplifier circuit you can make,I think. Enough for you to get rocked? TIP and are complementary Darlington pair transistors which can handle 5 A current and V ,famous for their ruggedness. This circuit is designed so rugged that this can be assembled even on a perf board or even by pin to pin soldering. You must try this circuit.

This article is a compilation of the simple and popular audio circuits we have published over years in CircuitsToday. This list involves a collection of simple amplifier circuits that you can try at home and some other audio related circuits with specific applications. This amplifier has been tested by many readers of CircuitsToday and many of them got correct output.