Various diagram: sound

Showing posts with label sound. Show all posts

Thursday, October 30, 2014

Subwoofers are the quality car sound

Car subwoofers are the life of a quality car sound organization. Basically, subwoofers are nothing supplementary than bonus speakers attached to your sound system. Car subwoofers might be situated passive otherwise powered. Passive woofers obtain their power from the cars audio arrangement, but a powered subwoofer derives its power independently. These days, indoors keeping with the newest technologies, car subwoofers draw closer in all shapes, sizes and flag.

being you could know, altered speakers attached to amplifiers hand over different frequencies of sounds. Subwoofers attached to an amplifier deliver low frequency low sounds in the song. In usual sound systems, the octaves are missing. in the main, listeners puzzle out not yearn for these sounds either. But if you fancy the rich and varied sounds of harmony, before if you covet to listen in to deep tracks (composition with the aim of has been personally formed instead of low), you would miss subwoofers willfully. Car subwoofers are a should if you want the car to echo with the beat of your melody.

round about of the paramount car subwoofers include Sony, Alpine and Kenwood. both of these products is well priced and delivers sharp quality sound. However, carry out run a voice check or you try ready slightly of these subwoofers since except the subwoofer delivers deep sounds, you might when well try with no them. You in addition need a subwoofer procedure with the purpose of good wishes the be and day of your vehicle.

Car subwoofers might range from 8 inches to 60 inches. nearly everyone subs are mounted clothed in boxes. But these days you can and urge them in a tube mounted format. usually, the subwoofer choice give rise to the amplifier connected to it so in the same way as to help it give the vital sound. Since power supplies are quite above what is usual in subwoofers and since you need accurate power supply to deliver high quality sounds, an amplifier is pretty much a obligation on behalf of subwoofers.

While business your car subwoofer, the key phenomenon you have to decide is everyplace to obtain it from. A integer of selections are open online, and a allocation of them are competitively priced. But, make it a aim to buy from apparent online dealers. after that, decide on the funds. Subwoofers are a luxury; they greet rations with the purpose of are ended and exceeding common expectations. So, solve not try to scrimp and save. lead to on behalf of the paramount quality subwoofers your financial statement desire allow. Longevity and quality matters. If you cannot afford regular prices, try not on online auctions. You can bag selected real bargains on time. then again, you could in addition consider exchange quality subwoofers with the aim of be inflicted with been used, but are inwards sound condition. A miniature caution and sensible selection spirit assent to you have a sound arrangement with the intention of is next to nothing.

Ask a few car audiophile, and they will acquaint with you that you simply cannot make with a car subwoofer. a long time ago you catch hooked to the pleasure of listening to right, extraordinary quality sound, you would remain singing the same pitch (excuse the pun).

7 Elephants has been a main distributor of many brands of car audio equipment such in the role of Pioneer, Kenwood, JVC, Sony, Panasonic and extra on reasonable prices.

Wednesday, October 22, 2014

Build a Cuckoo Sound Generator Circuit Schematic

This circuit generates a two-tone effect very much alike the cuckoo song. It can be used for door-bells or other purposes thanks to a built-in audio amplifier and loudspeaker. Used as a sound effect generator it can be connected to external amplifiers, tape recorders etc. In this case, the built-in audio amplifier and loudspeaker may be omitted and the output taken across C8 and ground. There are two options: free running, when SW1 is left open, and one-shot, when SW1 is closed. In this case a two-tone cuckoo song will be generated at each P1 pressing.

Circuit diagram:

Parts:

R1,R5___________1K 1/4W Resistors
R2_____________50K 1/2W Trimmer Cermet
R3______________8K2 1/4W Resistor
R4_____________82K 1/4W Resistor
R6______________1M 1/4W Resistor
R7,R17,R20,R21_22K 1/4W Resistors
R8,R10,R11,R19_10K 1/4W Resistors
R9____________150K 1/4W Resistor
R12_____________4K7 1/4W Resistor
R13___________100K 1/4W Resistor
R14___________220R 1/4W Resistor
R15,R22________20K 1/2W Trimmers Cermet
R16____________10R 1/4W Resistor
R18___________200K 1/2W Trimmer Cermet
C1,C11_________47nF 63V Polyester or Ceramic Capacitors
C2,C10,C12____220µF 25V Electrolytic Capacitors
C3____________220nF 63V Polyester or Ceramic Capacitor
C4_____________22nF 63V Polyester or Ceramic Capacitor
C5,C6,C8,C9___100nF 63V Polyester or Ceramic Capacitors
C7,C13,C14_____10µF 63V Electrolytic Capacitors
D1,D2,D3,D6__1N4148 75V 150mA Diodes
D4,D5_________BAT46 100V 150mA Schottky-barrier Diodes
Q1,Q2_________BC547 45V 100mA NPN Transistors
IC1____________7555 or TS555CN CMos Timer IC
IC2____________4093 Quad 2 input Schmitt NAND Gate IC
IC3____________4017 Decade counter with 10 decoded outputs IC
IC4___________LM386 Audio power amplifier IC
P1_____________SPST Pushbutton
SW1____________SPST Switch
SPKR___________8 Ohm Loudspeaker

Circuit Dis....
IC1 is wired as a square wave generator and produces both tones of the cuckoo song. The frequency of the higher one (667Hz) is set by means of Trimmer R2. When IC2D output goes low, a further Trimmer (R22) is added to IC1 timing components via D6, and the lower tone (545Hz) is generated. To imitate closely the cuckoo song, the square wave output of IC1 is converted to a quasi-sinusoidal wave form by R3, R4, C3 and C4, then mixed with the white noise generated by Q1, R6.

Q2 has two purposes: it mixes the two incoming signals and gates the resulting tone, shaping its attack and decay behavior by means of the parts wired around its Emitter. IC4 is the audio power amplifier driving the speaker and R15 is the volume control. The various sound and pause timings for the circuit are provided by the clock generator IC2A driving the decade counter IC3. Some output pins of this IC are gated by IC2C, IC2D and related components to drive appropriately the sound generator and the sound gate.

When SW1 is left open the circuit operates in the free-running mode and the cuckoo song is generated continuously. When SW1 is closed, the circuit generates two tones then stops, because a high state appears at the last output pin (#11) of the decade counter IC: therefore the count is inhibited by means of D1 feeding pin #13. The circuit is reset by a positive pulse at pin #15 of IC3 when P1 is pressed.

Setup:

Best results will be obtained if the two tones frequencies are set precisely, i.e. 667Hz for the first tone and 545Hz for the second: in musical terms this interval is called a Minor Third. Obviously a digital frequency counter, if available, would be the best tool to setup R2 and R22, but you can use a musical instrument, e.g. a piano or guitar, tuning-up the notes accurately by ear.

Disconnect temporarily R22 from D6 anode.
Connect the digital frequency counter to pin 3 of IC1.
Adjust R2 in order to read 667Hz on the display.
Connect R22 to negative ground and adjust it to read 545Hz on the display.
Restore R22 - D6 connection.

Tuning by ear:

Disconnect temporarily R22 from D6 anode.
Disconnect C8 from Q2 Collector and connect it to R4, C4 and C5 junction.
Adjust R2 in order that the tone generated by the loudspeaker is at the same pitch of the reference note generated by your musical instrument. This reference note will be the E written on the stave in the fourth space when using the treble clef.
Connect R22 to negative ground and adjust it in order that the tone generated by the loudspeaker is at the same pitch of the reference note generated by your musical instrument. This second reference note will be the C-sharp written on the stave in the third space when using the treble clef.
Restore R22 - D6 and C8 to Q2 Collector connections.

Notes:

The master clock can be adjusted by means of R18.
The percentage of hiss and sound in the mixing circuit, setting the tone character, can be varied changing R8 and R7 values respectively.
Any kind of dc voltage supply in the 12 - 15V range can be used, but please note that supply voltages below 12V will prevent operation of the white noise generator.
An amusing application of this circuit is to use a photo-resistor in place of P1, then placing the unit near the flashing lamps of your Christmas tree. A sweet cuckoo song will be heard each time the lamp chosen will illuminate.

Source: Red Free Circuit Models

Friday, October 17, 2014

Valve Sound Converter Circuit Diagram

‘Valve sound’ is not just an anachronism: there are those who remain ardent lovers of the quality of sound produced by a valve amplifier. However, not everyone is inclined to splash out on an expensive valve output stage or complete amplifier with a comparatively low power output. Also, for all their aesthetic qualities, modern valve amplifiers burn up (in the full sense of the word!) quite a few watts even at normal listening volume, and so are not exactly environmentally harmless. This valve sound converter offers a cunning way out of this dilemma. It is a low cost unit that can be easily slipped into the audio chain at a suitable point and it only consumes a modest amount of energy.

Valve Sound Converter Circuit Diagram

A valve sound converter can be constructed using a common-or-garden small-signal amplifier using a readily-available triode. Compared to using a pentode, this simplifies the circuit and, thanks to its less linear characteristic, offers even more valve sound. For stereo use a double triode is ideal. Because only a low gain is required, a type ECC82 (12AU7) is a better choice than alternatives such as the ECC81 (12AT7) or ECC83 (12AX7). This also makes things easier for home brewers only used to working with semiconductors, since we can avoid any difficulties with high voltages, obscure transformers and the like:the amplifier stage uses an anode voltage of only 60 V, which is generated using a small 24 V transformer and a voltage doubler (D3, D4, C4 and C5).

Since the double triode only draws about 2mA at this voltage, a 1 VA or 2 VA transformer will do the job. To avoid ripple on the power supply and hence the generation of hum in the converter, the anode voltage is regulated using Zener diodes D1 and D2, and T1. The same goes for the heater supply: rather than using AC, here we use a DC supply, regulated by IC1. The 9 V transformer needs to be rated at at least 3 VA. As you will see, the actual amplifier circuit is shown only once. Components C1 to C3, R1 to R4, and P1 need to be duplicated for the second channel.

The inset valve symbol in the circuit diagram and the base pinout diagram show how the anode, cathode and grid of the other half of the double triode (V1.B) are connected. Construction should not present any great difficulties. Pay particular attention to screening and cable routing, and to the placing of the transformers to minimise the hum induced by their magnetic fields. Adjust P1 to set the overall gain to 1 (0 dB). The output impedance of 47 kΩ is relatively high, but should be compatible with the inputs of most power amplifiers and preamplifiers.

For a good valve sound, the operating point of the circuit should be set so that the audio output voltage is in the region of a few hundred millivolts up to around 1.5 V. If the valve sound converter is inserted between a preamplifier and the power amplifier, it should be before the volume control potentiometer as otherwise the sound will change significantly depending on the volume. As an example, no modifications are needed to an existing power amplifier if the converter is inserted between the output of a CD player and the input to the amplifier.

Friday, September 26, 2014

Simple Electronic Tuning Fork Sound Generator Circuit

A standard tuning fork produces a tone of 440 Hz, that is, the inter- national A (orchestral pitch). lt is not very difficult to make an electronic alternative. An oscillator, a divider, a loudspeaker and a battery are all that is required. To be useful, an electronic tuning fork must, of course, be a compact unit. As the use of special, and therefore mostly, crystals was precluded, a little research showed that it would be possible to use relatively simple and standard components.

It appeared that the required frequency can be derived from a readily avail- able 1 MHZ crystal which, by means of a trimmer, can be pulled to 1,000,120 Hz which is the nearest frequency containing a whole number times 440 Hz. The oscillator is constructed a- round gates N1, N2 and tuned to 1,000,120 Hz (with a frequency counter if possible), by means of trimmer C2. The oscillator output is fed to lC2 which divides bv 2273 r2° + 25 + 26 + 27 + 2*1).A practcally symmetrical signal of 440 Hz is then available at output O11 of lC2. This signal is tjgien buffered by gates N3 . . . N6 and the balanced output stage gives a level sufficient to drive a small loudspeaker. ln spite of the current consumption of 65 mA, a standard 9 V battery (preferably alkaline-manganese) will suffice, because tuning forks are by their nature used for short periods only. lf the fork is used for longer periods, it might be advisable to consider a rechargeable battery.

Thursday, September 11, 2014

Jet engine sound generator

This jet engine sound generator schema is based on the sound generator IC HT2844P from Holtek Semiconductors. This particular IC can make four sounds namely low speed sound of jet engine,

high speed sound of jet engine, missile sound and machine gun sound. Each of these sounds can be activated by connecting the pins 12, 13, 14and 15 to ground by using the respective push button switches. Resistor R3 can be used for manually increasing or decreasing the speed.LED D1 gives a visible indication of the sound

Notes.

* The schema can be powered from a 3V battery.
* Do not give more than 3.3V to the IC.
* K1 can be a 200mW/8 Ohm speaker.
* IC1 must be mounted on a holder.

Sunday, August 31, 2014

The Risks of Self Installation of your Auto Sound System

The risks of installing your own auto sound system may be greater than you realize. The fact is that there are people that are professionally trained in the installation and proper handling of these delicate sound systems for a reason. If it werent a difficult task they wouldnt be able to demand the rather hefty price tag that most installation centers charge. The problem is that mistakes can actually cost more than the installation. If you arent one hundred percent certain that you can handle the installation process alone it is best to leave it up to the experts.

To prove my point, I will give you my very own personal story of how auto sound system installations can go horribly (well, perhaps hilariously would be the better choice of words in my particular situation) of course. You see I wanted a CD player in my mini van about 13 years ago. This was back in the dark ages when these types of sound systems were still relatively new and on the cutting edge when it came to technology.

These types of auto sound systems were definitely not the norm as they are in todays cars. I was commuting 3 hours (round trip) each day at the time and some of the time was spent among the corn fields where there were no towers broadcasting radio signals anywhere nearby. Im sure you can see why I felt I needed a CD player. At any rate, my wonderful dear old dad installed my brand new car (well mini van) stereo for me and all seemed to be going well until we realized that the horn no longer worked and that in order to actually use the stereo, the headlights must be on (this was also before daytime running lights were the norm as well).

Now that youve finished laughing Im sure you can understand why I am a huge advocate for having professional handle issues of installation when it comes to auto sound systems. It isnt that my dad, whom I love dearly for the effort, was incompetent when it comes to technical matters, in fact, he is highly skilled in these sorts of things ordinarily, it is simply that car stereos are so terrible complicated that it takes more than merely reading a set of instructions in order to get the maximum effect from your installation endeavors.

I have heard horror stories, particularly related to in dash installations that have resulted in some people having to make serious and costly repairs to their cars in order to fix the damage inflicted by installations by those who either lacked the proper tools, proper training, or a little bit of both for installing auto sound systems. While some drivers dont spend all that much time in their vehicles on any given day there are many commuters who put many miles on their cars, trucks, or SUVs during the course of a week. For these drivers it is often very important that they have the best possible sound systems for their vehicles. They will rely on their stereos to find out about weather conditions, traffic tie-ups, news, and possibly even entertainment during their long drives. If sound and music plays an important role in your life, dont you deserve the best auto sound system possible?