New 2 Channel Audio Mixer Circuit Diagram

This is very simple and easy audio mixer circuit diagram can be build using few common electronic components  .  This audio mixer electronic circuit has two input channels  . The input signal can be independently controlled using  the R1 and R2 variable resistors   . The R3 variable resistor offers possibility to fade out one of the signal while the other signal is fading in  .  The gain of the mixer is provided by the 2N3563 NPN transistor .  The R4 variable resistor connected at the audio mixers output offer possibility to control the output signal volume .

2 Channel Audio Mixer Circuit Diagram

This electronic audio mixer schematic  need  to be powered by a 9 volts DC power supply .

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Using LM4651 170 watt Audio power Amplifier Circuit Diagram

 This is the simple Using LM4651 170 watt  Audio power Amplifier Circuit Diagram . 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 .

Using LM4651 170 watt  Audio power Amplifier Circuit Diagram

Power amplifier circuit requires supply voltages +22 V DC symmetrical

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TDA7383 35W Car Quad Audio Amplifier Circuit Diagram

This is the TDA7383 35W Car Quad Audio Amplifier Circuit Diagram. The following a 4 x 35 watts channels/quad audio power amplifier circuit based IC TDA7383. The amplifier circuit is designed specifically suitable for car audio system applications. With a fairly large output power per channel, low distortion and low output noise features. Heatsink should be installed on the power IC to avoid excessive heat. There are very simple and easy to build cos only a few additional components outside the IC power.

TDA7383 35W Car Quad Audio Amplifier Circuit Diagram

 
TDA7383 Pinning

IC TDA7383 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7383 allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced components count allows very compact sets. The on-board clipping detector simplifies gain compression operations. The fault diagnostics makes it possible to detect mistakes during Car- Radio assembly and wiring in the car.

Absolute Maximum Ratings of IC TDA7383

Operating Supply Voltage                                   : 18 V
DC Supply Voltage                                          : 28 V
Peak Supply Voltage (t = 50ms)                             : 50 V
Output Peak Current Repetitive (Duty Cycle 10% at f = 10Hz): 4.5 A
Output Peak Current Non Repetitive (t = 100µs)             : 5.5 A
Power dissipation, (Tcase = 70°C)                          : 80 W
Junction Temperature                                       : 150 °C
Storage Temperature                                        : – 55 to 150 °C

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2 Channel Audio Power Amplifier Circuit Diagram

This is the LA 4440 IC based 2 Channel Audio Power Amplifier Circuit Diagram. LA4440 is a two channel audio power amplifier with inbuilt in dual channels enables it for stereo and bridge amplifier applications. In dual mode it gives 6 W per channel and in bridge mode 19 W output.

 It has good ripple rejection of 46dB, small residual noise, built in over voltage and surge voltage protection etc. ideal feature of the IC is its pin-to-pin protection. Here LA4440 is wired in bridge configuration using only one input.

2 Channel Audio Power Amplifier Circuit Diagram

Features of LA4440

1. Built in two channels to use as Mono and Stereo

2. Dual mode 6W x 2 and Bridge mode 19W

3. 46 dB Ripple rejection

4. 18V Max. Power handling and 12V typical

5. Good channel separation and low distortion

6. Built in Audio Muting function and Pin-to-Pin protection

7. Surge protection circuitry

Pin connection of LA4440

Pin

1 NF1

2 Audio In 1

3 Pre Amp Ground

4 Audio Mute

5 DC

6 Audio In 2

7 NF2

8 Gnd

9 BS 2

10 Audio Out 2

11 VCC

12 Audio Out 1

13 BS 1

14 Gnd

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Audio Tone Control Circuit Diagram

This is the simple Audio Tone Control Circuit Diagram. This simple Audio Tone Control can be acclimated in may audio applications. It can be added to amplifiers, acclimated as a angle abandoned ascendancy module, or alike congenital into new and agitate instruments. It's one IC architecture makes it a actual bunched circuit, as alone a few abutment apparatus are required. Plus, it does not use a bifold ability supply. This agency that the ambit will run from 9V to 15V (although the bass will be a little anemic at 9V).

Audio Tone Control Circuit Diagram

Part List

C1, C3, C5, C7, C15, C16 2.2uf Electrolytic Capacitor
C2, C6 0.05uF Ceramic Disc Capacitor
C4 0.22uF Disc Capacitor
C8, C10 0.015uF Ceramic Disc Capacitor
C9 100uF Electrolytic Capacitor
C11, C12, C13, C14 0.1uF Ceramic Disc Capacitor
R1, R4 10K 1/4W Resistor
R2, R5 33K 1/4W Resistor
R3, R6 4.7K 1/4W Resistor
R7 2.2K 1/4W Resistor
R8, R9, R10, R11 50K Linear Pot
U1 TDA1524A Tone Control IC
S1 SPST Switch
J1, J2, J3, J4 4 RCA Jacks
MISC Board, Wire, Knobs, 18 Pin Socket

NOTES

• S1 is a contour control. Volume is controlled by R11. Balance is controlled by R10. R9 and R8 control bass and treble, respectivly.
• J1 is the left input, J4 is the right input. J2 is the left output, J3 is the right output.
• The circuit is designed to accept line level or mic level inputs. if you are going to be using a stronger signal, a voltage divider will be necessary to cut it down to proper levels.
• You can, of course, skip J1-J4 if you plan to integrate this circuit into another.

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Best AudioTone Control Circuit Diagram

This is the Best AudioTone Control Circuit Diagram. This simple and best AudioTone Control can be acclimated in may audio applications. It can be added to amplifers, acclimated as a angle abandoned ascendancy module, or alike congenital into new and agitative instruments. It's one IC architecture makes it a actual bunched circuit, as alone a few abutment apparatus are required. Plus, it does not use a bifold ability supply. This agency that the ambit will run from 9V to 15V (although the bass will be a little anemic at 9V). The ambit is by Robert Barg and originally appeared in the Think Tank cavalcade of the May 1998 affair of Popular Electronics.

Best AudioTone Control Circuit Diagram

Part List

C1, C3, C5, C7, C15, C16 2.2uf Electrolytic Capacitor

C2, C6 0.05uF Ceramic Disc Capacitor

C4 0.22uF Disc Capacitor

C8, C10 0.015uF Ceramic Disc Capacitor

C9 100uF Electrolytic Capacitor

C11, C12, C13, C14 0.1uF Ceramic Disc Capacitor

R1, R4 10K 1/4W Resistor

R2, R5 33K 1/4W Resistor

R3, R6 4.7K 1/4W Resistor

R7 2.2K 1/4W Resistor

R8, R9, R10, R11 50K Linear Pot

U1 TDA1524A Tone Control IC

S1 SPST Switch

J1, J2, J3, J4 4 RCA Jacks

MISC Board, Wire, Knobs, 18 Pin Socket

NOTES

S1 is a contour control. Volume is controlled by R11. Balance is controlled by R10. R9 and R8 control bass and treble, respectivly.

J1 is the left input, J4 is the right input. J2 is the left output, J3 is the right output.

The circuit is designed to accept line level or mic level inputs. if you are going to be using a stronger signal, a voltage divider will be necessary to cut it down to proper levels.

You can, of course, skip J1-J4 if you plan to integrate this circuit into another.

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4-Channel Selector Stereo Audio Circuit Diagram

This is the 4-Channel Selector Stereo Audio Circuit Diagram. This scheme is used for connecting stereo outputs to four different channels of inputs and only one selected for output at any time.

4-Channel Selector Stereo Audio Circuit Diagram

When choosing the circuit breaker per channel (AR and AL). If there is no audio on channel A, waits scheme for some time, and then select the next channel (channel B) .The search continues until until it detects a sound in one chenal.The delay between channels or wait can be adjusted using preset VR1. If time is no longer necessary, you can replace the capacitor C1 with a higher value.

Jump manually from one channel to another channel active active, simply press the jump switch (S1) to the correct input channel is selected. The selected channel (A, B, C or D), denoted by the corresponding bright LEDs (LED 11, 12, 13 or 14).

IC contains 4 analog switches CD4066, these switches are connected to four channels. These analog switches controlled by IC CD4017 outputs. CD4017 10-bit ring counter IC. Since only one of its products is high at any time, only one switch closed at a time. CD4017 IC is designed as a ring counter 4-bit by connecting the fifth output Q4 (pin 10) on the reset pin. Capacitor C5, in connection with the resistor R6 form a power-on-reset IC2, so that the initial change in the power supply, the output Q0 (pin 3) is always ensured high. The signal IC1 CD4017 NE555, which operates as an astable multivibrator when the transistor T1 is in state court.

KA2281 IC5 is not only used to indicate levels of stereo audio channels selected, but also bias the transistor T1. Once a particular sound detection threshold in the selected channel, the pin 7 and / or 10 pin IC5 goes low. This low level is coupled to the base of transistor T1 through a combination of diodes D2-R1 / D3-R22 resistor. As a result, the transistor T1 conducts and causes the output of IC1, in order to remain low until the output signal level of the selected audio channel exceeds the threshold.

VR3 VR2 and Presets are included for adjusting each of the threshold levels for audio left and right stereo channels as desired. Once the action multivibrator IC1 is disabled, the output of IC2 is not changed more. Therefore, searching through the channels continues until it receives an audio signal above the threshold. Jumping the switch S1 is used to jump from one audio channel, even if present in the selected channel. The number of channels can easily be extended to ten by 4066 the use of additional integrated circuits.

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IC TL081 Based 4 microphones mixer Circuit Diagram

This is the simple IC TL081 based 4 microphones mixer Circuit Diagram. A TL081 op amp is used as a high impedance to low. converter and a signal mixer. The input impedance is about 1 megohm and the output impedance is about 1 kohm. Two 9 volt batteries are used as power source. Battery must be several hundreds of hours with alkaline batteries. Link

IC TL081 based 4 microphones mixer Circuit Diagram

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5W Audio Amplifier With Ac Power Supply

This general-purpose low-power (5 W) audio amplifier is suitable for driving a spaker

 5W Audio Amplifier With Ac Power Supply Circuit Diagram

 of approximately 8 to 12 inches. A Sanyo LA4460 IC is used as the audio output IC. The circuit consists of a loudness control, driver amplifier Ql, and bass and treble controls of about ±10 dB boost/cut. It should be useful in a wide variety of situations. Either the ac supply shown can be used, or a 12 Vdc supply can be connected to points A&B (positive) and C (negative). Two of these circuits, using ganged potentiometers at R2, R7, and Rll can be used for stereo applications. T1 is a 12-V 1-amp plug-in transformer. Notice that IC1 must be heatsinked. Power output is about 5 W. A 4` 2` 0.050` aluminum heatsink should be adequate.

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High-Power Car Audio Amplifier Circuit Diagram

This is a High-Power Car Audio Amplifier Circuit Diagram. This is use in cars this circuit is bridge system circuit diagram.

High-Power Car Audio Amplifier Circuit Diagram

FOR BRIDGE CONFIGURATION:

t install jumpers ju2 and ju4 2.remove j 1)3 3.remove rio 4replace r13 with jumper wire 5replace ri5 with 4.53k ohm 1% 6. replace r14 with 1 13k ohm 1% 7 cut foil between pads from rh and ground 8.input becomes left channel input 9.take ( output from left output 10 takf output from right output This stereo amp will supply 60 W rms into 8 or 100 W rms into 4 . Notice that the LM12C1 line level (about 300 mV) into 5 . A ±35-V supply is required for full power output. Power can be obtained from a dc-dc converter.

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Using TLC251Microphone preamplifier Circuit Diagram

This is an IC Using TLC251Microphone preamplifier Circuit Diagram. A microphone preamplifier using: om CMOS op amp with its own battery, is small enough to be placed in a case of small microphone. The amplifier operates from a 1.5V battery cathode mercury low supply currents. This preamp will operate at very low power and maintain a reasonable frequency response as well. 

 Microphone preamplifier Circuit Diagram

The TLC251 is operating in low bias (operating at 1.5 V) draws a supply current of only 10 and has a year - frequency response of 3 dB 27 Hz to 4.8 kHz. With 8-pin grounded, which is designated as the polarization state high limit increases above 25 kHz. Supply current is only - 30 pA under these conditions.

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56W High Audio Amplifier Use LM3875 Circuit Diagram

This is a simple 56W High Audio Amplifier Use LM3875 Circuit Diagram. The LM3875 is an audio amplifier for high power output capable of delivering 56W of continuous average power to a load 8. The performance of the LM3875, utilizing its maximum instantaneous auto temperature (° Ke) (Spike ™) protection circuitry, places it in a class above discrete and hybrid amplifiers by providing a yes, dynamically protected area of safe operation (SOA). SPIKE protection means that these parts are fully protected against output overvoltage, voltage surges caused by shorts to the supplies, the peak temperature thermal runaway, and instantaneous.

56W High Audio Amplifier Use LM3875 Circuit Diagram

 

This amplifier circuit is based on the non-inverted GainClone standard configuration. I did some calucaltions the feedback resistor and other components in order to check the gain, etc. For more background on the calculations relevant to GainClones in the background section.

Parameters IC LM3875

Output Current 6000 mA.
Offset Voltage max, 25C 10 mV.
Gain Bandwidth 8 MHz.
Supply Min 20 Volt.
Supply Max 84 Volt.
Supply Current Per Channel 30 mA.
PowerWise Rating 2 3750 uA/MHz.
Slew Rate 11 Volts/usec.
Input OutputType Not Rail to Rail.
Max Input Bias Current 1000 nA.
Special Features AvCl>10.
Function Op Amp.
Channels 1 Channels.
Temperature Min 0 deg C.
Temperature Max 70 deg C

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Digital Audio Memo Alert Circuit Diagram

This is a Digital Audio Memo Alert Circuit Diagram. This device prevents paper notes and memos from being overlooked. A paper note placed between two fingers made of a conducting material (metal or conductive plastic) breaks the circuit, allowing pair 1 of Ul-a to go high. This causes Ul-c Ul-d to act as an oscillator, pulsing piezo buzzer BZ1.

Digital Audio Memo Alert Circuit Diagram

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Simple Audio Controlled Switch Circuit Diagram

This is a Simple Audio Controlled Switch Circuit Diagram. The audio-controlled switch combines a pair of 741 op amps, two 2N2222 general-purpose transistors, a hexFET, and a few support components to a circuit that can be used to turn on a tape recorder, a transmitter, or just about anything that uses sound.

Simple Audio Controlled Switch Circuit Diagram

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Voice Switched Microphone Controlled Circuit Diagram

Build a simple voice switched microphone controlled circuit diagram. Voice activated control apparatus selectively connects one of a plurality of microphones to an audio line and inhibits all other microphones from capturing the line while the initial connection is maintained. In this circuit an electronic microphone feeds a bandpass filter circuit (IC1A), then feeds a comparator, which in turn drives Ql. Ql is a switch that conducts when audio from IC1B causes Dl, C4, R6, and R7 to bias it ON.

Voice Switched Microphone Controlled Circuit Diagram

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Build a Scanner Voice Squelch Circuit Diagram

This Scanner Voice Squelch Circuit Diagram detects the presence of audio (voice) on the output of a scanner. If the scanner stops on a `dead carrier` or noise, the circuit mutes the speaker to avoid annoying noise. Ul amplifies speech and drives rectifier D1/D2 and switch Ql. Comparator U3 drives speaker switch Ql and indicator LED1. Q2 completes the speaker path to ground. U2 is an audio amplifier to drive the speaker. R3 is a volume control. PL1 connects to the scanner speaker or to the headphone jack . 

Build a Scanner Voice Squelch Circuit Diagram

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Razor-sharp CW filter Circuit Diagram

The Razor-sharp CW filter Circuit Diagram consists of four stages of active bandpass filtering provided by two type-µ integrated-circuit dual op amps and includes a simple threshold detector (diodes Dl and D2) between stages 2 and 3 to reduce low-level background noise. Each of the four filter stages acts as a narrow bandpass filter with an audio bandpass centered at 750 Hz. The actual measured 3-dB bandwidth is only 80 Hz wide.

 Razor-sharp CW filter Circuit Diagram

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Best Audio Compressor Circuit Diagram

This Best Audio Compressor Circuit Diagram 2-band compressor splits the audio into high and low frequencies and allows independent adjustment of each. TVo active filters drive the two halves of dual voltage controlled amplifier/rectifier IC. Each section has a dynamic range greater than 100 dB. Compression gain slopes are adjustable from 2 to 25 for both audio bands. iB adjusts the threshold amplitude between the two bands. RK1 and R2/C2 control the compressor attack times (10 kfl and 2, respectively), while the 1.5- resistor in the integrator circuit controls the release line.

 Best Audio Compressor Circuit Diagram

 

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Tunable Bandpass Filter Circuit Diagram

One of the difficulties in the design of higher-order tunable bandpass filters is achieving correct tracking of the variable resistors in the RC networks. The use of switched capacitor networks can obviate that difficulty, as is shown in this filter. The filter can be divided roughly into two stages: an oscillator that controls the electronic switches arid the four phase-shift networks that provide the filtering proper. 

Tunable Bandpass Filter Circuit Diagram

The oscillator, based on a 555, generates a pulsating signal whose frequency is adjustable over a wide range: the duty factor varies from 1:10 to 100:1. Electronic switches ESI through ES4 form the variable resistors whose value is dependent on the frequency of the digital signal. The operation of these switches is fairly simple. When they are closed, their resistance is about 60 ; when they are open, it is virtually infinitely high. a switch is closed for, say, 25% of the time, its average resistance is therefore 240 . `Varying the open:closed ratio of each switch varies the equivalent average resistance. 

The switching rate of the switches must be much greater than the highest audio frequency to prevent audible interference between the audio and the clock signals. The input signal causes a given direct voltage across CI, so the op amp can be operated in a quasisym-metric manner, in spite of the single supply voltage. The direct voltage is removed from the output signal by capacitor C10. The fourth-order filter in the diagram can be used over the entire audio range and it has an amplification of about 40, although this depends to some extent on the clock frequency. The bandwidth depends mainly on the set frequency. The circuit draws a current of not more than 15 mA.

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Current-Driven Sallen Key Filter Circuit Diagram

Current-Driven Sallen Key Filter Circuit Diagram he low-pass Sallen-Key filter is staple for designers because it contains few components (A). By redesigning the filter, a current to voltage conversion can be avoided when the input signal to be filtered is in current form (B).

 Current-Driven Sallen Key Filter Circuit Diagram

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