Showing posts with label amplifier. Show all posts
Showing posts with label amplifier. Show all posts
Friday, December 12, 2014
Stereo Audio Power Amplifier 20 Watt
Here is a reliably high sound quality audio power amplifier project based on the National Semiconductor’s LM1875 IC.The circuit that we give is a similar form of the application circuit in the datasheet that NS provides. It is really easy to build and low cost.
Servo Amplifier current negative feedback
In the field of consumer reports electronics products reviews, product size, weight is toward smaller, lighter direction, high-power single-chip audio power amplifier needs of increasingly prominent, TDA7294 is currently the best performance, the biggest single-chip audio power amplifier One.
Audio power amplifier circuit 140 W
This simple schematic shows a 140W Audio power amplifier circuit by using 2N3569, 2N3055, MPS6533, 2N4355
Thursday, November 20, 2014
Headphone amplifier circuit
Headphone amplifier circuit with op amp ic OPA134, 2134, NE5532, 5534.
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| Headphone amplifier circuit with op amp |
150 watts power amplifier circuit
Amplifier circuit is 150 watts power amplifier circuit is quite simple.
This circuit requires only 5 pieces of transistors as the main component of reinforcement. There is no equalizer option on this amplifier circuit because it can be said of this series is very simple, so do not you compare it with that sold in the market which are usually equipped with various sound system and equalizer settings.
This circuit requires only 5 pieces of transistors as the main component of reinforcement. There is no equalizer option on this amplifier circuit because it can be said of this series is very simple, so do not you compare it with that sold in the market which are usually equipped with various sound system and equalizer settings.
But to add to your collection circuit, this circuit is fairly easy and inexpensive to make and maybe one day you may need as a weak signal booster from your electronic circuit. Or you can also make this amplifier as an amplifier of high frequency signal from the output circuit animal repellent and I guarantee the results are very satisfactory.
Power supply required is two-polarity power supply is + - 45 volts. Maximum power that can be obtained by this amplifier circuit is around 150 watts. As the volume control you can add potensio or variable resistor 10 Kohm in series at the input. Use dispasi loudspeaker with 150 watts power. Use a heatsink on the transistor-transistor driver loudspeaker or amplifier late as Q1 and Q2.
Monday, November 17, 2014
10W audio power amplifier with bass boost
As the amplifier circuit also uses a number of frequencies to drive the loudspeaker, the bass frequencies will be reduced. Therefore need to be plugged the bass-boost control at fedback loop amplifier, this is done to overcome the decline in quality.Graph bass can reach a maximum at +16.4 dB @ 50Hz.
This circuit can be connected directly to the CD player, tuner, and tape recorders. Q3 and Q4 must be in pairs with a heatsink.
Adjust the volume control at minimum position and R3 with a minimum value of resistance as well. try enabling circuit R3 da set up to read the flow of about 20 to 25mA. Wait for 15 minutes, connect the ground at J1, P1, C2, C4 C3dan. Connect also C9 at the output ground.
For his series of power supply you can use the following scheme that fits perfectly with this amplifier.
Wednesday, November 12, 2014
25 Watt Audio Amplifier Circuit
This is a 25 Watt basic power amp that was designed to be (relatively) easy to build at a reasonable cost. It has better performance than the standard STK module amps that are used in practically every mass market stereo receiver manufactured today. When I originally built this thing, it was because I needed a 25 Watt PC amp and did not want to spend any money. So I designed around parts I had in the shop.
Circuit diagram:
Parts:R1 = 47K
R2 = 4K7
R3 = 1K5
R4 = 47K
R5 = 390R
R6 = 470R
R7 = 33K
R8 = 150K
R9 = 15K
R10 = 27R
R11 = 500R-1/2W
R12 = 10R
R13 = 10R
R14 = 220R
R15 = 220R
R16 = 10R
R17 = 8.2R-2W
R18 = 22R-4W(wirewound)
C1 = 470nF-63V
C2 = 330pF-63V
C3 = 470µF-63V
C4 = 100nF-63V
C5 = 470µF-63V
C6 = 100nF-63V
C7 = 100µF-25V
C8 = 100nF-63V
C9 = 10pF-63V
C10 = 1µF-63V
C11 = 100nF-63V
Q1 = BC560C
Q2 = BC560C
Q3 = BC560C
Q4 = BC560C
Q5 = BC560C
Q6 = BD140
Q7 = BD139
Q8 = IRF530
Q9 = IRF9530
Power supply section:
Power supply circuit diagram:
Parts:R1 = 3K3-1/2W
C1 = 10nF-1000V
C2 = 4700µF-50V
C3 = 4700µF-50V
C4 = 100nF-63V
C5 = 100nF-63V
D1 = 200V 8A Diode bridge
D2 = 5mm. Red LED
F2 = 3.15A Fuses with sockets
F2 = 3.15A Fuses with sockets
T1 = 220V Primary, 25 + 25V Secondary 120VA Mains transformer
PL1 = Male Mains plug
SW1 = SPST Mains switch
Notes:
Read More..
Circuit diagram:
25 Watt Audio Amplifier Circuit Diagram
Parts:R1 = 47K
R2 = 4K7
R3 = 1K5
R4 = 47K
R5 = 390R
R6 = 470R
R7 = 33K
R8 = 150K
R9 = 15K
R10 = 27R
R11 = 500R-1/2W
R12 = 10R
R13 = 10R
R14 = 220R
R15 = 220R
R16 = 10R
R17 = 8.2R-2W
R18 = 22R-4W(wirewound)
C1 = 470nF-63V
C2 = 330pF-63V
C3 = 470µF-63V
C4 = 100nF-63V
C5 = 470µF-63V
C6 = 100nF-63V
C7 = 100µF-25V
C8 = 100nF-63V
C9 = 10pF-63V
C10 = 1µF-63V
C11 = 100nF-63V
Q1 = BC560C
Q2 = BC560C
Q3 = BC560C
Q4 = BC560C
Q5 = BC560C
Q6 = BD140
Q7 = BD139
Q8 = IRF530
Q9 = IRF9530
Power supply section:
Power supply circuit diagram:
Parts:R1 = 3K3-1/2W
C1 = 10nF-1000V
C2 = 4700µF-50V
C3 = 4700µF-50V
C4 = 100nF-63V
C5 = 100nF-63V
D1 = 200V 8A Diode bridge
D2 = 5mm. Red LED
F2 = 3.15A Fuses with sockets
F2 = 3.15A Fuses with sockets
T1 = 220V Primary, 25 + 25V Secondary 120VA Mains transformer
PL1 = Male Mains plug
SW1 = SPST Mains switch
Notes:
- Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need.
- Q6 & Q7 must have a small U-shaped heatsink.
- Q8 & Q9 must be mounted on heatsink.
- Adjust R11 to set quiescent current at 100mA (best measured with an Avo-meter connected in series to Q8 Drain) with no input signal.
- A correct grounding is very important to eliminate hum and ground loops. Connect to the same point the ground sides of R1, R4, R9, C3 to C8. Connect C11 to output ground. Then connect separately the input and output grounds to power supply ground.
- An earlier prototype of this amplifier was recently inspected and tested again after 15 years of use. Results, comments and pictures are shown here.
Sunday, November 2, 2014
100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram
Description :
100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram
100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram
Read More..
100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram
Wednesday, October 29, 2014
TDA2050 Power Amplifier Circuit
High output power, low distortion, power amp for HiFi and high class TV sets. Maximum output at 4 ohm speaker is 35 watts, while the 8 ohm speaker is only 15 watts. This circuit must use a good power supply so that the sound quality could be as expected.
List of components:
Resistors 1, 2, 3, 4: 22K ohm
5 resistor: 2.2 ohm
Capacitor 1: 100uF/50V
Capacitor 2: 2.2uf/50V
Capacitor 3: 22uF/50V
Capacitor 4: 0.47uF
Capacitor 5: 1000uF/50V
Capacitor 6: 100nF
Capacitor 7: 1000uF/50V
IC: TDA2050
TA8259H bassed 4 channel car amplifier Diagram Circuit
Using the TA8259H integrated circuit can be designed a very simple 4 ch BTL audio power amplifier for car audio application.
This IC can generate more high power: POUT MAX = 37 W as it is included the pure complementary PNP and NPN transistor output stage.
It is designed low distortion ratio for 4 ch BTL audio power amplifier, built-in Stand-by Function, Muting Function, Clip detector, and diagnosis circuit.
As you can see in the circuit diagram , this audio amplifier electronic project require extreme low external electronic parts .
Additionally, the AUX. amplifier is built-in, it can make the beep signal etc. output to 2 channels (OUT1 and 4).
Input voltage range that is accepted by this audio amplifier project is between 9 and 18 volt , but typically is required a 14,4 volts DC.All speakers used with this amplifier circuit project , based on TA8259H IC must have a 4 ohms impedance .
Tuesday, October 28, 2014
Mosfet High Power Amplifier complete PCB
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| Amplifier circuit is finished, and ready for use. |
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| 1000W High Power Amplifier with Mosfet Circuit Schematic Diagram |
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| PCB design for this Amplifier Circuit |
Simple 150 Watt Power Amplifier Circuit
This is the very simple circuit diagram of 150W power amplifier. The circuit is easy enough to built without PCB. The power output range is about 100-150W depends to the power supply and the Darlington’s you use for the amplifier. Heatsink is a must since the final transistor is going to hot when the amplifier is activated.
The amplifier requires split power supply. The transformer is depending to your home electrical installation, it can be 110V or 220V primary. Use 35V-0-35V secondary (transformer output), you will get about 45V DC output from transformer 35V AC after rectified by the diodes. The Transformer current output should be at least 4A for better audio performance. Use 4A / 100V diodes.
Monday, October 27, 2014
Power Amplifier Protector
Now you can protect your HiFi amplifier from damage due to overheating. This circuit will cut off power to the amplifier board at the time the temperature was high. Automatically connect the power when the temperature returns to normal. This circuit uses a sensor NTC Thermister heat and also has a warning sound and reset determination.
Amplifier circuit protector is using popular timer IC NE 555 as the temperature controlled switch. The trigger pin 2 is connected to a potential divider consisting Thermister VR and NTC. Thus the voltage on pin 2 depending on the resilience and determination Thermister VR. NTC (Negative Temperature Coefficient) Thermister has a high resistance in the normal temperature and the resistance decreases as temperature increases. Threshold pin 6 of IC is used to reset the IC if necessary. When the pin 6 voltage gets higher than the IC pin 2 will reset and the output is low.
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| Power Amplifier Protector Circuits |
Power to the amplifier board is given by (NC) contact is usually connected from the relay and the switch S2. So that power to the amplifier board will be available through the NC contacts of the relay when the relay S2 and the state is not powered. Thermister resistance is governed by VR triggering pin 2 of IC peaks at normal temperatures. When the temperature inside the cabinet amplifier increases, resistance decreases so that it becomes conductive Thermister. This makes the trigger pin 2 of IC is low and its output is high. T1 works so that the relay energizes and the ringing of a bell. This will damage the electrical supply to the amplifier board. Relay will not be automatically powered when the temperature returns to normal.
Amplifier circuit protectors are very useful to protect your home sound system.
NCS8353 20 W stereo Class D audio amplifier Diagram Circuit
A very simple stereo Class D audio amplifier electronic circuit project can be designed using the NCS8353 audio IC capable of delivering a continuous power of up to 20 W/ch into an 8 ohms .
NCS8353 stereo Class D audio amplifier circuit is designed by ON Semiconductor and it can be powered from the existing 24 V rail in Flat Panel Television (FPTV) systems. The high efficiency of the NCS8353, 86%, reduces the requirement of an external heat sink when driving high power.
The digital power limit feature can program the output power limit at 10 W, 12 W, 15 W, or 20 W/ch, allowing the NCS8353 to be a single system solution in FPTV audio applications.
The digital power limiter quickly reduces the internal gain of the amplifier when high amplitude signals would cause excessive clipping on the output.
The gain of the NCS8353 is programmed via two gain pins, G0 and G1, allowing four selectable ranges: 20 dB, 26 dB, 32 dB, and 36 dB.
Auto recovery short circuit and over temperature protection circuitry are incorporated to ensure device functionality after short circuit and high temperature events occur .
The circuit can be powered from a wide input voltage range from 8 volt DC up to 26 volt DC .
Sunday, October 26, 2014
5000W High Power Amplifier Audio Circuits
The High Power Amplifier has great advantages are 5000W ultra-light, high-power audio amplifier, without switching-mode power supply. This ambit is of an 2 x 2,500W RMS Stereo amplifier, super-light and after switching-mode ability supply. The ambit aloof shows a channel, and the ability accumulation that it assists to the two channels. The audio ambit should be duplicated, but the ability accumulation assists to the two channels after problems.
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| Click To view larger | 5000W High Power Amplifier Audio Circuits Diagrams |
A adapted affliction should be destined to the careful agent of the audio line, that should be of audio-high-quality, of the blazon acclimated in microphone pre amps ascribe line. The accomplished accumulation (2 channels) of 5,000W RMS it should not counterbalance added than 32 lbs, already central of an adapted brownish box.
WARNING:
This ambit is alone for abecedarian use. It contains not-isolated genitalia of the electric AC net and it can be actual dangerous. The access for the speakers are not abandoned of the calm AC net and it requests added care. This action seeks to acting a accepted ability accumulation with abundant weight and amount reduction, after necessarily to use a switching-mode ability supply.
This action cannot be accustomed in some countries for commercial-use. The columnist doesn’t accept any albatross for the anatomy as that ambit it will be applied.
LA4460 Simple Audio Amplifier
A unpretentious audio amplifier circuit can happen designed using the LA4460 IC . This circuit is very simple and require little exterior electronic components . The LA4460 IC is in fact used on behalf of car broadcasting or else car audio power amplifier and could provide output power up to 12 W. But at home this circuit is solitary used 5W.
Read More..
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| LA4460 Audio Amplifier Circuit |
This amplifier circuit can come about used for car means of communication applications , small screen , or else around other audio circuits so as to don’t require vast power .
explanation:
- work 12VDC to supply the circuit.
- Mount the LA4460 IC with an appropriate high temperature sink
- Some of as a rule worthy skin of the LA4460 IC are : reverse connection protection , muting function,thermal runaway protection circuit ,completed voltage & pitch voltage protection circuit, load stunted-circuit current limiting protection circuit, output pins DC short-circuit protection.
Friday, October 24, 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 .
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.
Read More..
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 .
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.
Wednesday, October 22, 2014
Splitter and Amplifier Video Circuit Diagram
This is the video amplifier circuit with splitter, it is designed to amplify the video signal, compensating for the loss of signal because this signal will then be split up to three outputs. The output signals may be used in television monitors, recording at the same time several DVDs, etc. .. The advantage of this circuit is that it is quite cheap, easy to build and the results are very good.
Splitter and Amplifier Video Circuit Diagram
Splitter and Amplifier Video Circuit Diagram
The video amplifier circuit has a maximum gain ratio of only 4 times the impedance is 75 ohms on the input and output, and wide bandwidth of this circuit is 5 Mhz
adjust VR1
1. Adjusting VR1 until the voltage at the base of Q1 is equal to one volt. And is the voltage drop across R7. (No input signal). Approximately 0.75 volts.
2. Adjust VR1 in the middle Enter the input signal is 1 Vp-p, then adjust VR2 to have the lowest rate of increase.
Then turn on the TV or monitor to the output and then adjust VR1 until the test signal to be applied without distortion.
PCB
Wednesday, October 15, 2014
4 X 15 Watt Mini Power Amplifier
A lot of electronic circuits in the domain of audio amplifiers are already been published here. This circuit is a little different because it is a four channel amplifier. Each channel of this amplifier can deliver an output of 15Watts into a 4 ohm speaker. The amplifier can be operated from a single 12V DC supply and this makes it possible to use this amplifier in car audio applications too.
Circuit diagram :
4 X 15 Watt Mini Power Amplifier
The circuit is based on the 15W BTL X 2 channel audio power amplifier IC TA8215 from Toshiba. Even though chip is specifically designed for car audio applications it can be also used for home audio applications. Two TA8215 ICs are used here in order to obtain a 4 channel amplifier system. The circuit is designed almost exactly as per the application diagram in the ICs datasheet. Pins 7 and 19 are the Vcc pins of the ICs internal integrated power amplifier stages and these pins are connected to the positive supply. Pin 9 is the Vcc pin for ICs internal preamplifier and it is also connected to the positive supply. Pins 13 and 14 are the internal power amplifiers ground pins and they are tied together and connected to the ground.
The internal preamplifier’s ground pin (pin5) is connected to the common ground through a 10 Ohm resistor which makes the input ground separated from the common ground by a resistance of 10 ohms and this improves the noise rejection. The 100uF capacitor works as a power supply de-coupler. The resistor networks connected to the output lines of each amplifier improves the high frequency stability. The variable resistors (R3, R4, R12 and R13) works as the volume controller for the corresponding channels.
Notes :
- Assembling the circuit on a good quality PCB is a must for obtaining optimum sound quality.
- Use 12V DC for powering the circuit.
- The ICs must be fitted with adequately sized heat sinks.
- R3, R4, R12 and R13 serves as volume controllers.
- K1 to K4 can be 4 Ohm, 20W speakers.
- This amplifier circuit can be used in a variety of applications such as car audio systems, home theater systems, personal audio systems, public address systems etc.
Saturday, October 4, 2014
20W Audio Amplifier using LM1875
This is just another 20W audio amplifier circuit, but this time based on LM1875 audio amplifier IC from National Semiconductor. With a dual power supply 25V LM1875 can deliver 20W of audio power into a 4 ohm speaker. The LM1875 requires fewer external components and has a very low distortion. The IC is also filled with a number of cool features, like the upload speed fast, wide range power supply, high output current, high-swing output voltage, thermal protection, etc. The IC is available in TO -220 plastic power package and is very suitable for a variety of applications including audio systems, servo amplifiers, home theater systems, etc.
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