Shown respectively for the subwoofer amplifier stage pre-amplifier circuit and the signal processing circuit. Here, in particular, the choice of the
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two American NS company recently produced LM3886 power lC way to promote access to BTL speaker impedance standard work 8fl in distortion requirements of less than 0.2%, the continuous sine wave output of 100W rated power. It should be noted clearly, I-M3886 is improved Ic NS company in I-M3886 basis, although each said its product introduction IJM3886 maximum possible sine wave output 68W rated power, but because of its internal design has a perfect over-power protection , in excess of 50w output power supply conditions, but it will be in low-amplitude signal its power consumption limit value for protection movement for leaving the ferry cut output signal distortion, we should just make it work at rated output power less than 50w the state. As we all know, a little better all the high power amplifier plus a speaker protection circuit, and cut off the speaker can only switch the operating current is no pressure drop relay contacts. However, the active speaker is mounted inside the relay, when the speaker issued a strong low-frequency ' sound when the ratio, the contact of the relay will generate mechanical sound interrupt jitter phenomenon q So, for larger power bass guns powered speakers, not on the circuit may affect the use of speaker protection relay system to work. Thus, we should also seek to have the power amplifier is perfect and reliable security features using discrete components to create these projections sound fine fatal flaw is also here, and we YAMAHA SONY company's three active subwoofer speakers been found, we found that they actually limit the output power of about 50w, and rarely work in the bass heavy situations. Using LM3886 amplifier lC to serve as an active subwoofer amplifier, just to take advantage of its perfect overheating, over current, over voltage, over power protection function to relieve other speaker protection circuitry requires additional design 6 Proof of actual use, two LM3886 power should put lC with ZOOmm 50mm 30mm size aluminum radiator, and should maintain a flow of air blown in the radiator top. To this end, the pre-and post-stage power amplifier circuit design into two separate printed circuit board, so that the amplifier board single security alone at the top after the radiator, and then install it inside the box inside the tube can be inverted air blowing out of position white has enough to push 12 t caliber subwoofer work rated output power of 100W sine wave, we need to avoid excessive output of the power applied to the speakers. T do this in the pre-circuit, designed by the resistor R123 and two VD117.VD118
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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