Thursday, November 20, 2014

Sine Wave To TTL Converter

Sine Wave To TTL Converter is a series that we can use to change the sine wave signal with a pulse shape with the same frequency with TTL logic level that we are ready to use in coding the data digitally . The series of Sine Wave To TTL Converter can be used to convert sine wave signal to form a TTL of frequency 100KHz to 80MHz at the level of 100mV - 2V. The series of Sine Wave To TTL Converter uses a 5VDC voltage source. The series of Sine Wave To TTL Converter was built from transistor T1 gets base bias from R3, R4 and R5. If the series Sine Wave Converter This TTL To get the input sine signal with a minimum level of 100mV, the circuit Sine Wave To TTL Converter This will generate an output signal with TTL level square wave.

The series of Sine Wave To TTL Converter has input + impedance - 50 Ohm which is set using the R6. To change the value of the input impedance converter circuit Sine Wave To this TTL can be set via the R6 with a maximum value of 300 ohms.
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Wednesday, November 19, 2014

Transistor As a timer circuit

Basically on all timer or timer circuit utilizing most of the basic characteristics of the capacitor.

Transistor

 The basic characteristic is the process of filling and discharge that occurs in the capacitor. The length of time charging and release depends on the value of the capacitor.

If we observe the above circuit, the light will immediately switch SW1 turns on when we plug it into potensio VR1, this is because the current flowing from VR1 to trigger the transistor base should fill the first capacitor C1. Semakian large capacitance value of C1 then the longer the time required by the transistor to turn on the lights. Then if we connect it to the Ground SW1 then light would soon die and the capacitor will immediately clear the cargo. So can we draw the conclusion that the transistor can be used as a timer circuit using capacitor charging and discharging properties.
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Audio Power Amplifier LM3886

Audio Power Amplifier is an important part in the reproduction of sound in a sound system. Audio Power Amplifier LM 3886 with power IC Audio Power Amplifier is a highly capable and able to produce 68 Watts with power rata2 4Ohm load and capable of producing power 38 Watt with 8Ohm load. With good sound reproduction capabilities of 20Hz-20kHz is also included on this LM3886 Audio Power Amplifier. LM3886 Audio Power Amplifier is equipped with spike protection that will protect the output circuit from overvoltage, undervoltage, overloads, konrsleting power supply, thermal runawaydan peak temperature. Audio Power Amplifier LM3886 also features a noise reduction system which can keep the audio from the noise well.

Image of Basic Audio Power Amplifier Series LM3886

Audio



Audio Power Amplifier LM3886

Feature owned LM3886 Audio Power Amplifier

  • 68W cont. avg. output power into 4Ω at VCC = ± 28V
  • 38W cont. avg. output power into 8Ω at VCC = ± 28V
  • 50W cont. avg. output power into 8Ω at VCC = ± 35V
  • 135W instantaneous peak output power capability
  • Signal-to-Noise Ratio ≥ 92dB
  • An input mute function
  • Output protection from a short to ground or to the supplies via internal current limiting circuitry
  • Output over-voltage protection against transients from inductive loads
  • Supply under-voltage protection, not allowing internal biasing to occur Pls | VEE | + | VCC | ≤ 12V, Thus eliminating turn-on and turn-off transients
  • 11-lead TO-220 package
  • Wide supply range 20V - 94V
  • Application of Audio Power Amplifier LM3886
  • Stereo audio system
  • Active Speaker
  • High End Audio Power TV
  • Suround Power Amplifier
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Tuesday, November 18, 2014

1000 Watt Power Amplifier

Power amplifier has up to 1000 Watt power, this circuit made one channel only so if you want to create a stereo in it must be made one again, actually this is more suitable power amplifier in use for Sound System or outdoor, so if only in use for the house I think is less suitable.
Maybe youve seen or even have an active speaker and there is written 1500 watts PMPO (Peak Music Power Output), make no mistake this is different from Power Amplifier Active Speaker, I often dismantle such Active Speaker in it only a power with power no more than 150 watts by using the transformer 2-3 Ampere. PMPO is not a real power which is issued by the Power Amplifier, but counting all the speakers that there is, for example: if there are 5 pieces of speakers on each channel and each speaker has a power of 10 W then it is 100 W PMPO.
1000W Power Amplifier schematics
Part List 1000W amplifier
While this 1000 Watt Power Amplifier minimal use transformer 20 Ampere. And the output of Power Amplifier DC voltage contains approximately 63 volts, with currents and voltages of this magnitude, this 1000 Watt Power Amplifier will not hesitate hesitate to destroy your woofer speakers to connect. To overcome that then before the speaker on connects to 1000 Watt Power Amplifier must be in pairs Speaker Protector.

Actually if you want to create a Power Amplifier with great power does not have to make a Power Amplifier with great power. Example: you want to create a Power Amplifier with 10 000 Watt power. You do not have to assemble a Power Amplifier with power of 10,000 watts, but you assemble the power Power Amplifier Small but many, such as you assemble the Power Amplifier with 1000 Watts of power for as many as 10 pieces, it will produce 10 000 Watt Power Amplifier helpless.

Circuit uses power transistors pair of 5 x 5 x 2SA1216 and 2SC2922 and 2SC1583 use a differential amplifier that actually contains 2 pieces of transistors that are in containers together. Why use such built-in amplifier differental tujuanya so identical / similar, could have uses 2 separate transistors but can result in amplifier so it is not symmetrical.

Tips combining speaker.

To get the speakers with great power combining techniques can be used in parallel series, combining each group of speakers should sepaker they will have the same impedance, the same type (Woofer, Mid Range or tweeter) and the same power. Number of merging these speakers should consists of 4 , 9, 16 ff, see picture
Speaker wiring


Example: The number of speakers have 4 pieces each of its 200 Watt power generated will be a speaker at = 200 x 4 = 800 Watt. If there are 9 speakers 200 W then the result = 9 x 200 W = 1800 Watt.
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Subwoofer power amplifier IC OPA541BM

Subwoofer power amplifier circuit based on IC OPA541BM very suitable for use in subwoofer speakers, these amplifiers possess excellence in sound issud because the sound is very clear and issued in accordance with subwoofer speakers in a low tone.
Subwoofer power amplifier IC OPA541BM Circuit

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Monday, November 17, 2014

LM4651 and LM4652 170W power amplifier

170 Watt power amplifier is a power amplifier that is built by IC LM4651 and LM4652. Part of this power amplifier driver using the LM4651 IC designed specifically for the purpose of the class AB amplifier driver with short circuit protection feature, containing under voltage, thermal shutdown protection and standby functions. Section 170 Watt power amplifier using LM4651 IC with a MOSFET power amplifier is equipped with temperature sensors that will be used by IC LM4651 as controlnya thermal signal. IC IC LM4651 and LM4652 are designed specifically to each other in pairs to create a class AB power amplifier with protection features are detailed. Detailed series of 170 Watt power amplifier can be seen in thethe following figure .

LM4651

Power amplifier circuit requires supply voltages +22 V DC symmetrical 0-22V. Power Amplifier with IC LM4651 and LM4652 are often used in portable HiFi systems such as powered speakers, power subwoofer and car audio power Booter. D1, D2, D3 and D4 in series 170 watt power amplifier with LM4651 and LM4652 is a 22V zener diode.
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Vertical IC Configuration

Various kinds of vertical out IC configuration.Ac coupling -connect from the yoke deflection output to a coil connected directly.Dc coupling - connected the output to the coil through a capacitor deflectioan yoke. Electrolityc Capacitors (usually worth 1000u/35v). This configuration requires two kinds of voltage (the voltage mirror plus-minus).Dc input coupling using diffferential - uses 2 input from the driver IC.

Vertical IC Configuration AC Coupling

Vertical IC Configuration DC Coupling

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