Rangkaian Regulator menggunakan Op-Amp

type='html'>Regulator is a series of regulations or the voltage output from power so that a portion darinaik effects or voltage drop in net does not affect the voltage ration power to be so stable.


Regular circuit of regulators have been good if the ripple voltage is small, but there is a problem of stability. If the voltage PLN rise /down, then the output voltage is also will be rise /donw. regular circuit of regulators, if the current of the larger, the dc voltage output is also down. For some applications this voltage change will very disrupt.

Rangkaian Regulator menggunakan Op-Amp

Skema rangkaian regulator menggunakan OP-Amp

Technical regulations that better is to use the Op-Amp for a drive-transistor Q. Dioda zener here do not give directly to the bait transistor Q, but as a reference voltage for the Op-Amp IC1. Feedback on the negative pin Op-amp is a snippet from the voltage regulator out, namely:

If the voltage V out exit Ascending, voltage V in (-) also Ascending until this voltage is the same as the reference voltage Vz. Likewise if the voltage V out decreases exit, for example because of supply current to the load increases, Op-amp will maintain stability in the V reference point z with the current IB to the transistor Q1 so that at any time in the Op-amp maintain stability:

Ignore the VBE voltage transistor Q1 and mensubsitusi formula, obtained by mathematical relationships

In the circuit of regulator Op-Amp of this output voltage can be adjusted with the set of R1 and R2.

Rangkaian Integrator Op-Amp 741

type='html'>Op-amp is versatile electronic circuits are designed and specially packaged, so that by adding external components at all, can already be used for various purposes. One of them is to make the integrator integrator circuit functions to produce an output voltage which is an integral function of time from the input voltage.

Rangkaianintegrator widely used in the "analog computer" as a tool for solve the integral equation. This circuit can be made by placing capacitors at the input and output reversed and no-reverse input earthed. Input signal given to the input reversed.

Skema Rangkaian Integrator Op-Amp 741

Integrator circuit testing procedures

• Arrange an op-amp integrators as shown in the image above. Supply Power dibua IC 741 can use two batteries or variable DC source.
• Set the input signal from the FG to generate signal box 1 Vp-p on frequency of 1 kHz.
• Use the oscilloscope to view the integrator output response
• Based on the circuit as shown above, you will verify that the output and input will follow the equation

Rangkaian Diferensiator Op-Amp

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Diferensiator circuit functions to produce a voltage which is a function of the time differential input voltage. Diferensiator circuit is basically a pass-filter for condenser consisting of rows and row resistor. Because the condenser reactance increases if the frequency falls, this circuit eliminates the low frequency components of an input. If there is input level applied to diferensiator, voltage on the condenser is changed in an instant so that there is voltage on the resistor decreases exponentially in accordance with the formula
CR is a constant time, ie the product of the resistance capacity. In one time constant, voltage condenser membentangi approximately 63%. It takes nearly 5 time constants to empty the condenser.

Skema Rangkaian Diferensiator Op-Amp

The formula for determining voltage output for the diferensiator is as follows:

Applications for this, besides representing the derivative calculus function inside of an analog computer, include rate-of-change indicators for process instrumentation. One such rate-of-change signal application might be for monitoring (or controlling) the rate of temperature change in a furnace, where too high or too low of a temperature rise rate could be detrimental. The DC voltage produced by the diferensiator circuit could be used to drive a comparator, which would signal an alarm or activate a control if the rate of change exceeded a pre-set level.

Rangkain Surround Sederhana Berbasis Op-Amp

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Rangkain Surround Berbasis Op-Amp

Although there have been similar circuits published over the years, this is a little different in a few areas. I wanted to avoid having any active electronics in the main Left and Right channels, since this eliminates any possibility of sound degradation due to the introduction of the opamps. The input impedance of 50k will not pose a problem for any preamp (including valve types), and the main signal is simply in parallel with the additional circuitry.

No volume control has been included, since you already have one in the preamp. It would just become another component to fiddle with, and since it would be rarely used, would probably become noisy over time.

Skema Rangkain Surround Berbasis Op-Amp

Opamp U1A is connected as a subtracting amplifier. Should the same signal be applied to both inputs, the output is zero. As a result, it will remove all common information from the stereo signal, and reproduce only the difference signal - in exactly the same way as the original Hafler design.

U1B is a simple summing amplifier, and the output contains all the information from both the left and right channels. A possibility that springs to mind is that we could then subtract the difference information from this output, so that only material that is absolutely common to both channels would be reproduced. Would this improve the performance to the extent that the extra circuitry is warranted? I tend to doubt it, but will look into this further.

Rangkaian Audio Limiter Berbasis Op-Amp

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Audio Limiter Berbasis Op-Amp

This audio peak limiter employs a FET as a variable resistance to attenuate the input signal according to a control voltage (CV). It offers unusually good performance with low cost and component count. A TL072 dual opamp (U1) provides the circuit gain and full wave peak detection.

Skema Rangkaian Audio Limiter Berbasis Op-Amp

If desired, a LED VU meter may be used here instead, and with proper calibration will give a good indication of the peak attenuation at any time. This option will require some experimentation from the constructor, and further details are up to the individual to work out.

The 4.7K resistor and 1uF capacitor (R14 and C5) determine the attack time, which is about 5ms as shown. R12 and C5 determine the release or recovery time, and as shown this is approximately 1 second.

R11, C3 C4 and R13 form the distortion cancelling circuit, and as can be seen, the control voltage impedance is very low compared to the distortion cancellation impedance, so the circuit's attack time is not compromised. The values of resistance and capacitance have been optimised for the least distortion across the audio band, at 0.3% THD typical for frequencies above around 500 Hz, at 1.65V RMS output level. Below 500 Hz, the distortion rises gently with decreasing frequency, but also falls with lower voltages. Distortion is negligible at any voltage level below the limiting threshold.

Be careful of values for R14 of less than 1k, as the opamp will be unable to supply the current needed to charge C5. R13 (3k) is easily made using a 1k2 and 1k8 resistor in series. C5 needs to be a low leakage capacitor - either a low leakage electrolytic or a tantalum. A standard electro is inappropriate for this circuit.

In addition, always keep R12 a minimum of 10 times R14 ... for example, if R14 were to be 1k, the minimum value for R12 will be 10k. This would be a very fast limiter indeed

Pembanding Tegangan Menggunakan Op-Amp

type='html'>Rangkaian Pembanding Tegangan

This following project serves to compare whenever the input voltage differs from two defined limits, V1 and V2. This circuit will provide an indication whenever the input voltage differs from two defined limits, V1 and V2. The supply voltage, Vcc must be higher than the highest input voltage by at least 2 volts. One application here is to monitor a 12V car battery. V1 could be set to 14V and V2 to 11V thus giving an indication of over charge or a weak battery.

Skema rangkaian pembanding tegangan

The CA3140 op-amps are used to advantage as they have very little output offset voltage and can switch down to near 0volts. If any other op-amp is used such as CA741 or LF351 then it will be necessary to have an offset null control. This is just a 10k preset pins contacted between 1 and 5, the wiper connected to the negative supply rail op-amps or 4 pins. With this circuit the op-amp either will light the LED if the input voltage goes out of limits, the two 1N4148 diodes forming an "AND"-gate at the output. The input voltage to be Monitored is fed via a series 10k resistors to inputs of both op-amps. If the input voltage is greater than the limit set by V1 then the CA3140 will swing its output to almost the full supply voltage and light the LED. Similarly, if the input voltage is less than the limit defined by V2 then this op-amp will swing towards Vcc and light the LED.

Rangkaian Op-Amp (LM741) Pre-Amp Mic

type='html'> Op-Amp Pre-Amp Mic

This is the circuit of Op-Amp Microphone Preamplifier using a single power supply, this circuit suitable for dynamic or electret microphones. Nothing too special here. The Schematic is shown using a dynamic microphone, for use with an electret a pair of suitable biasing resistor is required to power the electret microphone.

Skema rangkaian op-amp pre-amp mic

Note:

• use a capacitor with voltage 25volt or more
• so that the sound produced maximal use supplay good voltage, with output of 18 volts max
• If the desired strengthening of the different, you can change the value of R1 or R2

The design is a standard non-inverting design, the input is applied to the non-inverting input of the op-amp, which is pin 3 in most cases. The input impedance is 23.5k, the overall voltage gain is determined by R2 and R1according to the following formula:

Vo = (R2 / R1) + 1

With the values of R2 and R1 on the diagram of the voltage gain (for mid band, 1kHz) is approximately 23x or 27.2dB.

Pinning IC Op-Amp LM741

PENGUAT OP-AMP (LM 741)

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Penguat membalik

Penguat Op-Amp membalik akan menguatkan tegangan pada masukan serta membalik hasil penguatan tersebut, jadi keluaran dari rangkaian ini akan selalu memiliki polaritas yang berlawananan dengan sinyal masukannya.

Penguatan tegangan pada rangkaian ini di tentukan menurut

Tegangan keluaran diperoleh dengan jalan mengalikan tegangan masukan yang diketahui dengan factor penguatan, atau

Tanda minus diabaikan dalam perhitungan karna hanya menunjukkan bahwa keluaran berlawanan fasa terhadap masukannya.

Penguat tak membalik

Dalam konfigurasi ini umpan balik yang digunakan untuk mengatur penguatan tetap di berikan pada masukan membalik, tapi Vin di berikan pada masukan tak membalik sehingga tegangan keluaran akan selalu sefasa dengan tegangan masukannya.

Untuk mendapatkan penguatan tegangan dapat dicari dengan persamaan berikut

Untuk memperoleh tegangan keluaran dapat dicari dengan mengalikan tegangan masukan yang diketahui dengan factor penguatan, atau

Penguat penjumlah tegangan

Dengan menggunakan rangkaian penguat membalik dasar dan menambahkan resistor pada masukan lainnya, kita dapat membuat penguat penjumlah membalik. Tegangan keluaran akan dibalik dan nilainya sama dengan penjumlahan aljabar dari masing-masing perkalian tegangan masukan dengan hasil bagi resistor masukan dengan resistor umpan balik yang bersesuaian, atau dapat dinyatakan sebagai berikut

Suku R_F/R_N (V_N) dalam rumus di atas menyatakan bahwa dalam rangkaian tersebut mungkin terdapat lebih dari dua masukan. Bila semua resistor luar sama nilainya (R_f = R₁ = R₂ = … = R_N), keluaran dapat dengan mudah dapat di hitung sebagai penjumlahan aljabar dari masing-masing tegangan masukan, atau

Triangle and Squarewave Generator Using Op-Amp

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The circuit shows a simple triangle and squarewave generator using a common LM1558 dual op-amp to produce very low frequencies to about 10 KHz. The time interval for one half cycle is about R*C and the outputs will supply about 10mA. Triangle amplitude can be altered by adjusting the 47k resistor and waveform offset can be removed by adding a capacitor in series with the output.

Absolute Maximum Ratings Of Op-Amp LM1558 IC

• Supply Voltage ±22V
• Power Dissipation 400 mW
• Differential Input Voltage ±30V
• Input Voltage (Note 3) ±15V
• Operating Temperature Range −55°C to +125°C
• Storage Temperature Range −65°C to +150°C
• Lead Temperature (Soldering, 10 sec.) 260°C

Op-Amp 6-Line Audio Mixer Circuit

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As with any audio mixer circuit, a slight loss is always introduced. The final summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should be around 200mV RMS.

Skema Rangkaian 6-Line Audio Mixer based Op-Amp

The mic inputs are amplified about 100 times or 40dB, the total gain of the mixer including the summing amplifier is 46dB. The mic input is designed for microphones with outputs of about 2mV RMS at 1 meter. Most dynamic microphones meet this standard.

The choice of IC op-amp is not critical in this circuit. Bipolar, FET input or MOS type op-amps can therefore be used; i.e 741, LF351, TL061, TL071, CA3140 etc. The power supply is a dual positive and negative supply, two 9 Volt batteries may be used as shown above or a power supply is recommended for longer periods of use

DC Motor Controller Circuit Using 741 Op-Amp

This DC motor controller circuit using a 741 operational amplifier operating as a voltage follower where its non inverting input is connected to the speed and rotation direction of a potentiometer VR1. When VR1 is at mid position, the op-amp output is near zero and both Q1 and Q2 is OFF.

When VR1 is turned towards the positive supply side, the output will go positive voltage and Q1 will supply the current to the motor and Q2 will be OFF. When VR1 is turned to the negative supply side, the op-amp output switches to the negative voltage and Q1 will turn OFF and Q2 ON which reverses the rotation of the motor's direction.

Skema Rangkaian DC Motor Controller Using 741 Op-Amp

741 Op-Amp Pinout

As the potentiometer VR1 is moved toward either end, the speed increases in whichever direction it is turning. The TIP3055 Q1 NPN power transistor has a collector current specs of 15A and VCE0 of 60V DC. The MJE34 Q2 PNP power transistor has a collector current specs of 10A and VCE0 of 40V DC.

Audio Peak Level Indicator By Op-Amp

simple circuit PEAK indicator of foliage of the musical signal. This circuit was designed to provide a valuable test equipment tool for sound reinforcement systems like sound amplifiers and the like. The circuit is formed by an input buffer and ac to dc voltage converter (IC1A) feeding a window comparator (IC2A, IC2B, IC2C) which illuminates one of three LEDs at a time.

Skema Rangkaian Audio Peak Level Indicator By Op-Amp

No setup is required: if correct values are used for resistors R3 to R7, LED D1 will illuminate at 0dB input (0.775V RMS), LED D2 at +5dB input (1.378V RMS) and LED D3 at +10dB (2.451V RMS).

The circuit was optimized for low current consumption as it was intended for battery operation. To achieve this, the best arrangement has proven to be the one using two different op-amp types for IC1 and IC2. In fact the LM393 IC was not operating satisfactorily as dot-mode LED driver, whereas the LM324 was unable to charge C2 in the linear way, as expected. Therefore, the final circuit is some op-amp wasting, but the small added cost will be quickly compensated by battery savings.

List Component:

R1 : 300K D1,D2,D3 : LEDs
R2 : 1M2 IC1 : LM393
R3 : 510K IC2 : LM324
R4 : 220K IC3 : 78L05
R5 : 91K SW1 : SPST Toggle or Slider Switch
R6 : 160K B1: 9V PP3 Battery
R7 : 56K
R8,R9 : 100R
R10 : 220R
C1 : 100nF
C2 : 1µF/63V
C3 : 10µF/25V

6 Band Graphic Equaliser Circuit Using 741 Op-Amp

This circuit is 6 Band Graphic Equaliser ,you can adjust sound in low ,mid and high which circuit used IC 741 Op-Amp. With this circuit you can control and blend frequencies and tones as desired.

Essentially, the circuit consists of an IC 741 whose gain at various freguencies is determined by corresponding potentiometer setting.

Skema Rangkaian 6 Band Graphic Equaliser Using 741 Op-Amp

The audiblefrequency spectrum is covered in six steps: 50Hz, 160Hz, 500Hz, 1.6kHz, 5kHz, 16kHz. All potentiometers are of 100kΩ linear type. The circuit provides adequate boost / cut for normal use.

power supply for the circuit can be derived from the amplifier / preamplifier itself. The wide rangeof supply voltage (6V-20V) makes the circuit very versatile. Power consumption is negligible.

list Component

R1,R2,R3,R4,R5,R6 : 27kΩ C1: 100n C6: 300pF
R7: 470kΩ C2: 33n C7: 100uF/16V
R8: 330kΩ C3: 10n C8: 4.7uF/16V
R9: 100kΩ C4: 3.3n C9: 47uF/16V
R10: 4.7kΩ C5: 1n IC1: 741 Op amp
R11: 4.7kΩ
VR1,VR2,VR3,VR4,VR5,VR6: 100kΩ Linear Potentiometers 

Rangkaian 11-90 hz Subwoofer Filter Using TL072 Op-Amp

The subwoofer filter circuit allows the addition of subwoofers to an existing full-range system, offering adjustable low-pass filtering with optional R6 and R8 boost and mono-summing.

Skema Rangkaian 11-90 hz Subwoofer Filter
Using TL072 Op-Amp

TL072 Op-Amp

The Subwoofer filter circuit to remove for separate pre amplifier to drive the low frequency sound a lot. In tone, call tone, normal Can not be done … is a fine deep low bass sounds like a bass drum, or at a movie complex in a low voice if we can be heard with But to add cabinets and amps. The subwoofer circuit is pass low frequency with in 11-90 Hz. Switching power supply 12V cut out if they need to use +-15V. I had change the Capacitor to cut out vocals per the red circle mark.