Showing posts with label amp. Show all posts
Showing posts with label amp. Show all posts
Thursday, October 23, 2014
Vocal Adaptor for Bass Guitar Amp
These days, music is a major hobby for the young and not-so-young. Lots of people enjoy making music, and more and more dream of showing off their talents on stage. But one of the major problems often encountered is the cost of musical equipment. How many amateur music groups sing through an amp borrowed from a guitarist or bass player?
This is where the technical problems arise not in terms of the .25” (6.3 mm) jack, but in terms of the sound quality (the words are barely understandable) and volume (the amp seems to produce fewer decibels than for a guitar). What’s more, unpredictable feedback may cause damage to the speakers and is very unpleasant on the ear. This cheap little easy-to-build project can help solve these technical problems.
Circuit diagram :
Vocal Adaptor for Bass Guitar Amp Circuit Diagram
A guitar (or bass guitar) amplifier is designed first and foremost to reproduce the sound of the guitar or bass as faithfully as possible. The frequency response of the amp doesn’t need to be as wide or as flat as in hi-fi (particularly at the high end), and so this sort of amplifier won’t permit faithful reproduction of the voice. If you build an adaptor to compensate for the amp’s limited frequency response by amplifying in advance the frequencies that are then attenuated by the amp, it’s possible to improve the quality of the vocal sound. That’s just what this circuit attempts to do.
The adaptor is built around the TL072CN low-noise dual FET op-amp, which offers good value for money. The NE5532 can be used with almost the same sound quality, but at (slightly) higher cost. The circuit breaks down into two stages. The first stage is used to match the input impedance and amplify the microphone signal. For a small 15 W guitar or bass amplifier, the achievable gain is about 100 (gain = P1/R1). For more powerful amplifiers, the gain can be reduced to around 50 by adjusting P1. The second stage amplifies the band of frequencies (adjustable using P2 and P3) that are attenuated by the guitar amp, so as to be able to reproduce the (lead) singer ’s voice as clearly, distinctly, and accurately as possible. To refine the adaptor and tailor it to your amplifier and speaker, don’t be afraid to experiment with the component values and the type of capacitors.
The circuit can readily be powered using a 9 V battery, thanks to the voltage divider R4/R5 which converts it into a symmetrical ±4.5 V supply.
Monday, October 20, 2014
12W Amplifier Circuit Using 741 Op Amp Circuit Diagram
A 12 watt audio amplifier operating on a dual symmetrical supply of ± 12 volts. The 741 provides the required gain while the speaker drive is provided by the complementary Darlingtons T1, T2 and T3, T4.The input signals for the darlingtons are derived from the supply current of the 741. Since R6 is connected to the ground, the positive or negative signal currents also pass through R4 or R5. The voltage drop across these resistors serves as the input signal to the transistor pairs. An overall dc negative feedback from the common collector junction of T2 and T4 stabilises the dc conditions of the circuit and keeps the junction point at zero volts. Hence, no coupling capacitor is required for the speaker.
12W Amplifier Circuit Using 741 Op Amp Circuit Diagram
| PARTS LIST | |
| R1 | 10KΩ |
| R2 | 4.7KΩ |
| R3 | 270KΩ |
| R4 | 1KΩ |
| R5 | 1KΩ |
| R6 | 47Ω 1W |
| C1 | 50 Pf |
| C2 | 0.01 µF |
| T1 | BC178 |
| T2 | 2N6107 |
| T3 | AC108 |
| T4 | 2N5294 |
| IC | LM741 |
| LS1 | 50W 4Ω |
Tuesday, February 4, 2014
Op Amp Sound Module wit IC741
This is due to the IC Acting Analog amplifiers. Mainly commonly used is the IC Op-Amp reduced. Is a valuable slew rate low. It can not know the immediate modification of the digital motion. The frequency response is not expansive adequate. Makes the sound move toward impossible with distinct and harsh. We need to arrange with an analog output amplifier with peak efficiency. And a filter wearing glut of excessive. To eliminate the sharp sound.So this circuit. must elite the IC op amp with high quality. To follow a significance LEWIS Garrett with a high and expensive. The circuit is not the numeral IC op amp to live used depending on demand.
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| Op-Amp Sound Module wit IC741 Circuit Diagram |
Whilst raising the power supply circuit, the power sector through candid loans isolates. Consisting of Q1, Q2, ZD1, ZD2, R5, R6, C10 and C11. The circuit Direct loans segregate the control voltage in support of supplying the integrated circuit is on 12V and-12V. The C5-C9 is a radio dish. bypass capacitor. Help indoors responding to exalted frequencies and reduce the leak of the capacitor electronic highlighting of C4 and C3. while the input to the pin 3 bedroom inverse proper IC1 to delay motion not to period improbable the. Pin 6 and the signal part is fed back through R3 and R2. which is 1.3 epoch the growth rate C1 and C2 play a part to eliminate high frequency redundant. This circuit is a circuit with the intention of extends the ordinary. The rule that the resistance of the circuit high input, to prevent the loading of the amplifier’s first album. And a low output resistance, so they can drive oodles without difficulty. The sound quality to tolerate come up to shown that is based on the IC op-amps used IC op-amp must take the elevated slew rate opamp.
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