August 28, 2016

Stereo Speaker Protection

This is the stereo speaker protection circuit, provides stereo speaker protection and prevents switch-on clicks and DC components on the output of the amplifier connected. Stereo Speaker Protection Circuit diagram :Stereo-Speaker-Protection-Circuit
Speaker Protection Components List:

  1. R1,R2 : 3K3
  2. R3,R4,R5,R6,R7 : 8K2
  3. R8,R9,R10,R11 : 330K
  4. R12,R13 : 18K
  5. R14,R15,R16,R17 : 47K
  6. R18 : 47
  7. R19,R20 : 680
  8. R21,R22 : 100K
  9. R23,R24,R25,R26 : 1K2
  10. C1,C2,C3,C4,C5,C6 : 1?F
  11. C7,C8,C9,C10 : 100?F
  12. C11 : 220?F
  13. C12,C13 : 470?F
  14. D1,D2,D3,D4,D5,D6,D7,D8,D9,D10 : 1N4148
  15. D11,D12,D13,D14 : 1N4007
  16. ZD1 : 6V8
  17. T1,T2,T3 : BC547B
  18. T4 : BC517
  19. LD1 : Red (ERROR INDICATOR)
  20. LD2 : Yellow (WAIT INDICATOR)
  21. RY1,RY2 : VR15M121C (12VDC – 15A – 1C)
  22. Transfo (1,2VA – 2 x 6V / 2 x 0,1A)
  23. IC1 : LM324

Circuit Notes:
This circuit uses center tap transformer and the power supply circuit design already provided in the schematic diagram. It powered with 6V dual polarity power supply.

This circuit available in kits, you may order the kit online. The manual assembly of the kit can be download at the end of this post.

This stereo loudspeaker protection will protect the loudspeakers against the switch-impulsions and the direct current component on the output of the connected amplifier.
Suitable for:

  1. Amplifiers with symmetrical power supply
  2. Amplifiers with asymmetrical power supply.
  3. Specifications :
  4. Switch-delay: 6 seconds
  5. DC protection: +1V/-1V
  6. Max. input voltage: 200Vpp + DC
  7. Max. switching current: 10A
  8. LED indication for: WAIT (switch-on delay) and ERROR (DC on speaker output)
  9. Supply voltage: 220VAC .Read more http://circuitdiagram.net/speaker-protection-circuit-stereo.html


New Speaker Portection Circuit using transistor complete part list.
Speaker Portection Circuit using transistor
This additional variable speed fan controller which functions so that the fan rotation slowly during cold power amplifier, and a strong fan rotation while the power to heat.
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Inverting amplifier circuit

There are two types of systems namely Strengthening inverting amplifier (inverted) and the non-inverting amplifier. The following discussion of the inverting amplifier.A simple inverting amplifier systems can be implemented with just an Op Amp. For example, as shown below: The picture above is a simple audio amplifier scheme called inverting amplifier, Why? because its output will generate the inverted signal of the input signal.
Inverting amplifier circuit
Certainly would not hear the difference in our ears, but it will be very important to consider if we work with the system BTL (Bridge Transformer Less). * For the BTL system we discussed another time yach *
To amplifier as above, we can easily calculate how much gain. Only by dividing R2 to R1. For example:

The input signal = 100 mV (milli Volt)
R1 = 1Kohm (kilo Ohm)
R2 = 10kOhm

eans the gains is 10 times
So that the output signal generated is 10 x 100mV = 1000mV or 1V
Simple right?
Well, so for the application in the assembly with IC 4558 could be as shown below:
Inverting amplifier circuit diagram

Amplifier Microphone for instance, then you can fill in the value of the following components:
R1 = 1Kohm
R2 = 100kOhm
C1 = 10μF
C2 = 10μF
V + = 12 V Dc
* The circuit above only works with symmetrical power supply system (+ (positive), 0 (ground), and - (negative) *
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August 27, 2016

Simple Peak Detector Circuit

This circuit is made to indicate that the amplifier has been given the maximum signal, the ability of the amplifier has to be at its peak. if the light is on means the signal-volume do added again.

How it works is the LED lights will light if given a signal that more than 1.8 Volt, the average amplifier will be saturated (maximum) if the signal was given more than this.

The circuit is very simple to the point that we forget that making a series of peak singnal be this way. This circuit is mounted on the output tone control IC, the output master mixer or power amplifier input. This circuit will not overload the circuit to another.
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TA8215 Power Amplifier Circuit

The Circuit of 4 channel power amplifier car.A series of power amplifiers for car use TA8215 amplifier IC, which ic has 4 channel output. So it is suitable for use on cars. To output power per channel was approximately 10 Watt. But in the discussion of the power amplifier circuit schematic of this car in the bridge circuit, so be 2 Channel, but the higher power output than the previous which only one channel. Thus requiring two amplifiers IC Ta 8215 to get a 4 channel output.

Here's a circuit schematic 2-channel power amplifier car bridge:




Amplifier voltage is required at a minimum to a maximum of 12VDC and 20VDC.
Power amplifier circuit has been my tests. And get great results, clear and smooth voice is not nasal tone or hum.
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August 26, 2016

1000W Mosfet Power Inverter Circuit

This is the power inverter circuit based MOSFET RFP50N06. The inverter capable to handle loads up to 1000W, it’s depended on your power inverter transformer. The RFP50N06 Fets are rated at 50 Amps and 60 Volts. Heat sink is required for cooling the MOSFETs. You may add some MOSFETs with parallel connection to get more power. It is recommended to have a Fuse in the Power Line and to always have a Load connected, while power is being applied.

1000W Mosfet Power Inverter Schematic Diagram

1000W Mosfet Power Inverter circuit


1000W Power Inverter circuit source: telus.net
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Choosing the Right Amplifier for your Car

Finding the best amplifier for your auto sound system can be a lot easier if you take the time ahead of time to learn what you need and what will work best with the sound system you've selected for your car, truck, or SUV. It helps to understand what an amplifier does in order to purchase the one that will best suit your needs. An amplifier takes a small sound, adds a little boost of its own, and then turns it into a big sound. The more power your amplifier has, the better quality of sound it will provide. An underpowered amplifier will have a thin, tinny sound that is rather unattractive in an auto sound system, or any other sound system for that matter.

You should also take care to remember that the power rating of an amplifier is the maximum power it is capable of expending not the amount that it will regularly use. The RMS rating of an amplifier is a good indication of its power output. One thing that is important to remember is that you should never buy an amplifier based on the maximum output or RMS rating. This number is more often than not incredibly misleading. If a driving, thumping bass beat is important to you then you should make sure that your amplifier has a bass boost button. This button will or switch will give a little bit of a boost to your bass. It's something I can pass on by many bass lovers cannot live without. Not all amplifiers have this so choose wisely and according to your preferences.

When it comes to amplifiers there are essentially four major classes (there are other classes but they are not all that common so I will not dwell on defining them) that represent the quality of sound you should expect from the system.

1) A. This class has a great output of quality sound but wastes huge amounts of energy in the process of creating that wonderful sound.

2) B. This class is slightly better than A as far as it wastes less energy and slightly worse as it produces a somewhat inferior quality of sound.

3) A/B. This resembles either A or B as far as sound and energy waste goes depending on the volume. Lower volumes will utilize the class A qualities of the amplifier while louder volumes are more in keeping with class B.

4) D. This class is primarily decent for producing a good bass sound and little else. The quality of sound and amount of energy wasted are both only moderate and neither are very impressive.

Of course this is the bare bones run through of the very basic amplifier basics. Another thing to note is that many people simply refer to amplifiers as amps rather than saying the entire word. It's slang but it's so common that no one will blink if you do it. In fact you are far more likely to get funny looks for calling it an amplifier. Regardless of the small talk an amplifier isn't the end all be all of an auto sound system. It is only important if you feel it is important and many sound systems work splendidly without an extra amplifier to confuse the process and raise the price.

Whenever you decide to buy a new auto sound system for your car, truck, or SUV there is a moment of exhilaration and excitement as this is often a decision you've mulled over for quite a while rather than a spur of the moment decision. This exhilaration is promptly followed by a moment of complete and utter fear, as most of us have no clue what we really need. Hopefully, this has helped you decide whether or not you will need an amplifier and if you will, perhaps you can make a more educated and informed decision as to the type of amp you need.

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Complete Home theater set up speakers

Home theaters are getting to be extremely popular among American homes. This modern technology is slowly giving movie theaters a run for their money. Basic knowledge of home theater system and its basic components may be best for people who want to bring home relaxation and entertainment. 

The most important consideration in the design and complete set up of your home theater is the size of the room. The home theater speakers and the other components of your home theater may need to consider the size of the room. Too small rooms for your home theater may not require so many speakers. Only three speakers may be good if the room is quite small. 

Do not overload your small room; you may not be able to get the entertainment and relation you want if you feel overloaded with so many home theater speakers. Because you only need three home theater speakers in your small room, you may need to acquire the high-end brand of home theater speakers to compliment the size of the room and the other equipments for your home theater.

Complete Home theater set up speakers
Complete home theater speaker setup
If you have a bigger room however, the basic three home theater speakers may not be enough. You may need to put up to six speakers around the room, you may also consider complimenting your home theater speakers with subwoofer to complete the surround sound like in movie theaters. In addition to the speakers, you may also need to purchase a high-end television set which should not be smaller than 27 inches. It may not be reasonable if you buy a smaller television set because it may drown in the fineness of your home theater speakers.

Home Theater speaker set up
Additionally, the DVD player needs to be of high quality, having progressive scan your DVD Player may help provide sharp images and flicker-free pictures for your home theater system. The home theater speakers, television and DVD player are the basic components of a home theater system especially if the room is quite small. However, for bigger room, adding home theater furniture and home theater projectors may be necessary to complete the package. Again, it may be worth it, if your home theater speakers are of high quality. This is because of the need to provide a surround sound for the home theater set up. The DVD player and the television set may answer for the requirement of sight in a movie theater setup. Your home theater speaker needs to answer for the sound requirement, and if your home theater speaker is not of high quality brand, it may not be able to do the job for you.

In order for you to avoid making mistakes in your choice of home theater equipments including home theater speakers, and home theater furniture, you may require the services of a home theater designer. They will be able to provide the best recommendation that will ensure you will get the most out of your home theater system including topnotch home theater speakers. Additional home theater furniture may be necessary to complete the package and to dress up the whole room. Since they are the designers, they will be able to recommend the best for your home theater system set up. If you have a properly designed home theater, you will be the best entertainment possible.

Your home theater designer may take on the huge responsibility of choosing the most suitable home theater speaker to attain the best design for your home theater.

Bring home relaxation and entertainment right in your own living room, home theater system can provide this to you and your family.

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Crossover types Passive and active

Crossover is a tool that serves to limit the "frequency range" to be received by the speaker. Crossover is used to regulate flow to the tweeter, the midrange, midwoofer, and bass to the subwoofer. There are two kinds of crossover, the crossover passive and active crossover.


how the passive crossover, the type of crossover types, crossover types, the types of rosover
passive crossover 
Passive crossovers work after receiving the output of the amplifier, are ineffective because they are throwing power amplifier, because the passive crossover frequencies have been processed in the "boost" (increase) by the amplifier.

passive crossover
active crossover 
Active crossovers work so signal generated by the head unit (pure signal), dividing it in accordance with the desired frequency boost later in the amplifier, so that the amplifier to work more efficiently, and frequencies produced more organized in accordance with their respective purposes, tweeter, midrange, woofer , subwoofer.

A little short in the use of an active crossover is the use of 12V power, ground, and remote. In theory this could lead to "noise" on the audio system, but do not worry, by the proper installation, and use good quality products will not occur a problem, as in any "competition-level car audio system". If you want to raise just a little audio sound quality, passive crossover is the right choice. But if want the sound quality is really good you should select an active crossover. Active crossovers require special mounting, especially for power cables and ground wires, but the effort is proportional to the quality of music produced. Active Crossover works by "cutting" is not frequency necessary before the "boost" by the amplifier, so the amplifier can focus on the frequency you want to hear, so do not waste energy Power.
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Home theater design

Having to be able to bring home entertainment may be a luxury. This is because only very few households can afford home theater system. Of late, only the rich and the famous can afford such luxury. This notion is now a thing of the past. Home theater systems may now be available to greater number of households because of the knowledge of basic home theater design. The basic home theater design may only require three basic components and these three components may already be affordable for the working class.

Home theater design However, before you may need to think of the basic home theater design for your home theater system, you may need to know the size of the room for the home theater set up. The size of the room to where the home theater will be set up will depend on how basic the home theater design needs to be.

Home theater experts recommends that if the room is quite small, all you need for your home theater design is a television set, three speakers and a DVD player. The home theater design may be dependent of the shpre of the room; however, the position of the speakers remains to be the left, the right and the center of the room. Basic home theater design may require a television set bigger than 27 inches. Too small screen for your home theater design may not be sufficient for a movie theater-like experience. 

This is because even for the home theater design, you may need to consider the sight and sound of a movie theater. It is the main consideration why people go to a movie theater, the big screen and the surround sound. With respect to the surround sound of a movie theater, the basic three speakers is only applicable for smaller rooms, if the room is bigger, the home theater design needs to be more than three, you may go up to six speakers and a complimenting subwoofer may be necessary for the surround effect. Going back to a small room, if you will only put three speakers, you may want to consider buying a high quality brand speaker; this will give you enough surround sound for a smaller room. 

If you have a small budget, ensure that the store where you will buy your speakers will allow you to test the product in your room and if it will not give you a good surround sound, they should allow you to return or replace the unit. This is because some speakers sound good in the store but when you finally set them up in a small room, the effect is not very good. Find a neat deal where they can allow you to return or replace the speakers. However, if your budget is sufficient, you may consider hiring the services of a home theater designer. 

Your home theater designer will be able to design the home theater better and with complete accessories. He may require checking the power rating, and the need for amplifiers. He may also recommend using home theater projectors and he may recommend how the speakers need to be. You will get a good home theater design if you will be able to hire home theater designers. The need for home theater seating and television cabinet may also be necessary for the complete package of your home theater.

You may enjoy the entertainment without having to tide traffic jam and enjoy in your own home theater system. 

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