Showing posts with label with. Show all posts
Showing posts with label with. Show all posts
Wednesday, November 19, 2014
USB SPDIF DAC with IC PCM 2902
The tool that I made and I discuss in this article I give the name USB SPDIF DACEvery word in the name corresponds to the function of the tool that I made this.
USB, this device serves to take the music information in digital form from a computer via the USB port
SPDIF, this tool can output digital music information received through the USB port, through the SPDIF output terminal that is also present in this device, so if you have a DAC that does not have a USB input, you can still use and do not need to buy a new DAC that has an input USB.
DAC, this tool can convert the digital signals derived from the USB port, an analog signal, which you can connect to the amplifier to the ahirnya you can hear the speaker
Scheme of the USB DAC can be seen in Figure 1 below.USB, this device serves to take the music information in digital form from a computer via the USB port
SPDIF, this tool can output digital music information received through the USB port, through the SPDIF output terminal that is also present in this device, so if you have a DAC that does not have a USB input, you can still use and do not need to buy a new DAC that has an input USB.
DAC, this tool can convert the digital signals derived from the USB port, an analog signal, which you can connect to the amplifier to the ahirnya you can hear the speaker
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| Click to view larger. | Figure 1 |
As you can see on the schematic in Figure 1 above, which is the heart of the circuit is IC USB DAC PCM2902 made by Texas Instrument, other than that I also added a digital SPDIF output isolation transformer on from this series. 2902 PCM encoding decoding work on the principle that generally abbreviated as word CODEC.
The new circuit will work when the USB input port terminal in the circuit connected to the computer, at this voltage 5V on the USB port of any computer will be triggering the circuit to begin work, and vice versa when the computer is turned off then the circuit will be in standby mode to wait until there is more tension 5V from USB port of computer.
When the received voltage is 5V USB port the computer then the circuit will begin to receive the digital data files during the grace period of 1 ms, all data received during the period of time of 1 ms is called a frame, the data in the first frame is stored in a memory buffer that is in the PCM2902, then the circuit will start the second frame as well as long lead times for 1mS, 1mS a second after the first data from the file will be converted into analog signals for analog terminal is then removed through out the pin 15 and 16 of the PCM2902, other than that this digital signal simultaneously will also excreted through the DOUT terminal pin 25 of the PCM2902 DAC to be connected to older products that do not have a USB input terminal.In addition to functioning as a DAC, PCM2902 actually also has other functions such as setting volume level and ADC, but the circuit that I developed is only aimed for the ADC and the conversion from USB to SPDIF.
Proposed Power Supply For USB SPDIF DAC
Power Supply that I use in this project using the configuration has been proven able to tame the hum in the tube 26, the power supply has karakater very stable, low noise and low impedance, but complicated to make, so for the purposes of this project I recommend another series that is not as complicated Heater power supply 26, but the quality is still better than most of the power supply kit used in the DAC in general, Figure 2 below is the recommendation power supply for USB DAC this project.
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| Click to view larger. | Figure 2 |
1. Diode bridge and capacitor input filter
2. TL431 as the reference voltage
3. OP Amp OP27 as the error amplifier
4. BD139 transistor as a pass transistorThis configuration is basically the general configuration of a linear regulator series, very much the regulator IC using this configuration, but the circuit in Figure 2 above has several advantages that are not owned by the regulator circuit in the form of ICa) high stability, since it uses a reference voltage source of good quality is TL431, and therefore not in a package with a pass transistor, the heat of the pass transistor can not seep into the source of reference voltage and makes it unstable, this sort of thing happens in IC voltage regulator.b) Using the Op Amp high quality, which in this case OP27, so it is not easy to oscillate as the OpAmp used in the regulator IC.c) If there is a chance you could also replace the TL431 or OP27 Op Amp voltage source and another that is expected to be better than either of these components.
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| Series of the finished PCB, top view |
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| IC PCM2902 |
Wednesday, November 12, 2014
NJU7365 bassed DC brushless motor driver circuit with explanation
A very simple single phase dc brushless motor driver electronic circuit project can be designed using NJU7365 DC brushless motor driver ic manufactured by New Japan radio Co. LTD .
The NJU7365 is a single phase motor driver ic that include in package MOS FET motor driver , direct PWM input , FG output and thermal shut down circuit . The driver is capable of 1000mA maximum output current and continuous current of 350 mA . This motor driver require few external electronic parts and can be powered from dc power supply from 2 to 5.5 volts .
Wednesday, October 29, 2014
600 Watt Quasi Amplifier With Mosfet IRFP460
ACTK 400/600 Watt
Two versions of a robust module capable of delivering high powwer for extended periods. The Actrk400 uses 6 n-channel Mosfets in the output stage to deliver around 400 watts into 4 ohms while the Actrk600 uses 12 n-channel Mosfets in the output stage to deliver power in excess of 600 watts into 4 ohms. One constructor has achieved almost 900 watts with the Actrk600 layout using 12 IRFP460 Mosfets.
ACTK Power Supply
Schmatic
Layout power supply
Final Set up And Adjustment
No attempt should be made to set up or test a power amplifier module that is not correctly mounted on
a heatsink. Make sure the main power supply is fused and the work area is clear. First check all your
work and make sure the output devices are insulated from heatsink. The set up is done without an
input or a load connected to the power amplifier.
1. Check the power supply is operating correctly and verify the rail voltages. Switch the power
supply off and check with a multimeter that the rail capacitors have discharged.
2. Using a multimeter measure the resistance of VR2 and set it for maximum resistance.
3. Correctly connect the ground lead, the two positive leads plus the negative lead to the power
amp module.
4. Remove the PCB fuses and replace with 100 ohm 5 watt resistors. Connect a multimeter that
is set to the 20 volt scale across the positive rail 100 ohm resistor.
5. Check that the power supply connections are correct one last time and switch on. If the
multimeter reading goes off-scale, turn off immediately and find the problem. Check also the
100 ohm 5 watt resistors; they may have gone open cct.
6. If everything seems ok adjust VR2 to set the output stage bias current, by measuring the
voltage across the positive rail resistor. Adjust for a reading of 4 volts per output FET pair. I.e.
For a 6 FET board set for a voltage of 12 volts. This equates to a bias current of 40mA per FET
pair or 120 mA total. For the 12 FET board set for a voltage of 24 volts.
7. If everything seems ok, check the output offset voltage and adjust VR1 to achieve an offset of
less than 10 mV. You will need to wait briefly between adjustments for the offset to settle.
8. All being well switch off, back off the bias control trimmer (VR2) and replace the 100 ohm
resistors with 10 ohm 1 watt resistors. Switch on again and re-adjust VR2 to get 0.4 volts per
FET pair.
9. Switch off, remove the resistors and put the fuses back in. Switch on, re-check the offset
voltage and adjust with VR1 if necessary.
The amp module is ready, connect the input and output and enjoy.
Read More..
Two versions of a robust module capable of delivering high powwer for extended periods. The Actrk400 uses 6 n-channel Mosfets in the output stage to deliver around 400 watts into 4 ohms while the Actrk600 uses 12 n-channel Mosfets in the output stage to deliver power in excess of 600 watts into 4 ohms. One constructor has achieved almost 900 watts with the Actrk600 layout using 12 IRFP460 Mosfets.
Actrk 600W schematic
ACTK 400W Layout
ACTK 600W Layout
Schmatic
Final Set up And Adjustment
No attempt should be made to set up or test a power amplifier module that is not correctly mounted on
a heatsink. Make sure the main power supply is fused and the work area is clear. First check all your
work and make sure the output devices are insulated from heatsink. The set up is done without an
input or a load connected to the power amplifier.
1. Check the power supply is operating correctly and verify the rail voltages. Switch the power
supply off and check with a multimeter that the rail capacitors have discharged.
2. Using a multimeter measure the resistance of VR2 and set it for maximum resistance.
3. Correctly connect the ground lead, the two positive leads plus the negative lead to the power
amp module.
4. Remove the PCB fuses and replace with 100 ohm 5 watt resistors. Connect a multimeter that
is set to the 20 volt scale across the positive rail 100 ohm resistor.
5. Check that the power supply connections are correct one last time and switch on. If the
multimeter reading goes off-scale, turn off immediately and find the problem. Check also the
100 ohm 5 watt resistors; they may have gone open cct.
6. If everything seems ok adjust VR2 to set the output stage bias current, by measuring the
voltage across the positive rail resistor. Adjust for a reading of 4 volts per output FET pair. I.e.
For a 6 FET board set for a voltage of 12 volts. This equates to a bias current of 40mA per FET
pair or 120 mA total. For the 12 FET board set for a voltage of 24 volts.
7. If everything seems ok, check the output offset voltage and adjust VR1 to achieve an offset of
less than 10 mV. You will need to wait briefly between adjustments for the offset to settle.
8. All being well switch off, back off the bias control trimmer (VR2) and replace the 100 ohm
resistors with 10 ohm 1 watt resistors. Switch on again and re-adjust VR2 to get 0.4 volts per
FET pair.
9. Switch off, remove the resistors and put the fuses back in. Switch on, re-check the offset
voltage and adjust with VR1 if necessary.
The amp module is ready, connect the input and output and enjoy.
Tuesday, October 28, 2014
250mW 16 dB VHF amplifier Circuit diagram
A high efficiency simple 2-transistor VHF amplifier electronic circuit project can be designed using this electronic circuit diagram . This VHF amplifier electronic circuit has a very high efficiency of about 16dB gain, and requires no tuning or alignment procedures. Wideband techniques have been used in the design and the circuit is equipped with a "lowpass" filter to ensure good output spectral purity. This VHF power amplifier circuit is specifically designed to amplify the output of 7mW to 10mW WBFM transmitters to a final level of 250mW to 300mW, after the filter.
The output of this stage is around 70mW of RF power.
The transistor is biased by means of R5, R6 and L6, and the residual DC current is set by R4. The input signal is coupled by C9 to the Base of the transistor.
The input signal from Q1 is coupled to the Base of Q2 via C7.The 78L08 voltage regulator is used to regulate the supply voltage to Q1 and the bias votages to both Q1 and Q2 so that the output RF power is relatively constant, even with large variations of supply voltage.
The output of the amplifier is filtered with a low-pass filter to reduce the output spurious and harmonic content.
The output filter consists of C3, C4, L1 and L2.
This RF power amplifier must be powered from a simple 12 volts DC power supply circuit.
![]( "250mW")
The output of this stage is around 70mW of RF power.
The transistor is biased by means of R5, R6 and L6, and the residual DC current is set by R4. The input signal is coupled by C9 to the Base of the transistor.
The input signal from Q1 is coupled to the Base of Q2 via C7.The 78L08 voltage regulator is used to regulate the supply voltage to Q1 and the bias votages to both Q1 and Q2 so that the output RF power is relatively constant, even with large variations of supply voltage.
The output of the amplifier is filtered with a low-pass filter to reduce the output spurious and harmonic content.
The output filter consists of C3, C4, L1 and L2.
This RF power amplifier must be powered from a simple 12 volts DC power supply circuit.
Sunday, October 26, 2014
Running Disco Light with IC 4017
The following article explains how to design a minimal Running Disco Light Circuit Diagram using IC 4017. The IC 4017 is a 16 pin dual featuring in line package IC consists of a 10 stage decade counter/barrier. further in a row in this area the IC 4017 configuration visit at this point.
![]( "Running")
Read More..
Unpretentious Running Disco Light mechanism by 230V and has ceiling 800 W for every channel load. The circuit can direct in Disco mode furthermore, by concerning narrator terminal to audio transformer known, & switching S1 to audio mode. prevail on other in a row on how to design the plain Running Disco Light Circuit
Tuesday, September 16, 2014
VU Meter 5 with UAA180
This circuit of measurement of level uses the UAA180 of SIEMENS and a circuit of rectification of precision, round the IC2B. The calibration has become in steps 3db from the one Led in the other, ensuring, a very good rate of precision, in the measurement of entering acoustic signals. The Led can be square, thus when they are placed the one by in the other, they give the picture of bar, without space. VU Meter 5 with UAA180 Circuit diagram: ![]()
Parts List: R1= 47Kohm
R2= 1Mohm
R3= 33Kohm
R4= 10Kohm
R5= 220ohm
R6-9=390ohm
R7=2.2K ohm
R8-10=330Kohm
R11=180Kohm
C1= 47uF 25V
C2-4=47nF 100V
C3=2.2uF 25V
D1....8= LED GREEN
D9-10= LED YELLOW
D11-12= LED RED
D13....17= 1N4148
IC1= UAA180
IC2= TL072
Read More..
R2= 1Mohm
R3= 33Kohm
R4= 10Kohm
R5= 220ohm
R6-9=390ohm
R7=2.2K ohm
R8-10=330Kohm
R11=180Kohm
C1= 47uF 25V
C2-4=47nF 100V
C3=2.2uF 25V
D1....8= LED GREEN
D9-10= LED YELLOW
D11-12= LED RED
D13....17= 1N4148
IC1= UAA180
IC2= TL072
[Link]
Monday, September 8, 2014
RF Amplifier circuit with 2SC1970 2N4427
RF power amplifier circuit of this work is based on the transistor 2SC1970 and 2N4427. The set output power of 88-108 MHz FM RF Amplifier With 2SC1970 is about 1.3W and the input driver is 30-50mW. RF driver amplifier circuit uses a 2N4427 and its power amplifier using a transistor 2SC1970.
At the time of the amplifier circuit tuning FM 88-108 MHz RF Amplifier With 2SC1970 should use the power meter / watt meter or SWR or RF field can also use the meter. RF amplifier circuit can work from the frequency of 88-108 MHz.
At the time of the amplifier circuit tuning FM 88-108 MHz RF Amplifier With 2SC1970 should use the power meter / watt meter or SWR or RF field can also use the meter. RF amplifier circuit can work from the frequency of 88-108 MHz.
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| RF Amplifier |
Circuit of 88-108 MHz FM RF Amplifier With RF 2SC1970 can radiate far enough. At the time of tuning you should use a 50 Ohm dummy load. For the input signal should be installed to regulate the VR level so as not to over-modulation (30-50mW).
AM and FM Radio with LA1800 Portable
This portable AM and FM radio schema is designed using the LA1800 IC and some other external components. As you can see in this schema diagram the LA1800 manufactured by Sanyo Semiconductors , require few additional components. The LA1800 am FM portable radio schema needs to be powered from a 3 volt DC power supply schema.
AM and FM Radio with LA1800 Portable Circuit Diagram
You can use an 3 volt battery. This radio receiver schema has a low current dissipation of 5.6mA for FM band and 3.2mA for AM band .Also the output signal is driven into earphone speakers , but you can use an additional speaker ( in that case you need to connect an additional small power audio amplifier).
Power Supply with regulator output use IC uA723
This circuit operating with IC uA723 and add amplified with transistor TIP31 or similiar transistor with TIP31 . Input voltage for circuit about 10 - 40 volt DC , formerly of AC voltage 220 volts or 110 volts , then lowered by the transformer voltage to 30 volts. And the supply output voltage from 1 volt to 35 volt DC you can adjust it on potentiometer R2.
See this circuit power supply below :
Output voltage transformer used 10 to 40 Volts . On resistor Rsc is the current limit set resistor. Its value is calculated as :
Rsc = 0.65 Volt For Example : If you need current output 2.0 A
Rsc = 0.65 / 2.0 = 0.32 Ohm So , you must use 0.32 Ohm to current output 2.0 A
Sunday, September 7, 2014
600 Watt Quasi Amplifier With Mosfet IRFP460
ACTK 400/600 Watt
Two versions of a robust module capable of delivering high powwer for extended periods. The Actrk400 uses 6 n-channel Mosfets in the output stage to deliver around 400 watts into 4 ohms while the Actrk600 uses 12 n-channel Mosfets in the output stage to deliver power in excess of 600 watts into 4 ohms. One constructor has achieved almost 900 watts with the Actrk600 layout using 12 IRFP460 Mosfets.
| 600 Watt Quasi Amplifier With Mosfet IRFP460 |
Thursday, September 4, 2014
Schematic Audio Amplifier with IC AN7102S
This Schematic use IC AN7102S , this is setereo amplifier and have output speaker 7,5 mW with impedance 32 Ohm . Supply need 1Volt to 3 Volt , wow this amplifier low voltage. You can use this amplifier on radio is use battery . With just one battery with voltage 1,5 Volt you can play this amplifier.
See this Schematic below :
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| Click to Enlarge |
Datasheet IC AN7102S
Vcc = 1-3 V
Pout = 2X 7,5 mW
RL = 32 Ohm
Ft = 20hz - 20Khz
Icco = 7 mA
Package = DIP-18
Manufactered = MATSUSHITA
Low Power Amplifier with digital volume control
Amplifier with digital volume control can we make predictably because the circuit is made simple with just single chip TDA8551. The series of Mini Amplifier With Digital Volume Control is a type BTL amplifier with 1 Watt.
Techniques for adjusting the volume in this series has been provided with a pin path control that is controlled by providing an input voltage VCC and GND. The series is also equipped with a selector mute, standby and operating.
Techniques for adjusting the volume in this series has been provided with a pin path control that is controlled by providing an input voltage VCC and GND. The series is also equipped with a selector mute, standby and operating.
| Mini amplifier with digital volume control schematics |
Wednesday, September 3, 2014
Schematic Audio Amplifier with IC AN7108
See this circuit below:
Datasheet IC AN7108
Vcc = 1-6,6 V
Pout = 2X 30 mW
RL = 32 Ohm
Ft = 20-20 Khz
Icco = 14 mA
Package = DIP-16
Manufactered = MATSUSHITA
Tuesday, September 2, 2014
Door Bell Timer with Adjustable Timing Facility
Yes this simple transistor schema can be used as a home door bell and it’s ON time can be set as preferred by the user, meaning if you wanted that the sound of the bell to remain switched ON for a particular period of time, you could easily do it just by adjusting the given pot.
The actual tune is derived from the IC UM66 and the associated components, while all the included transistors along with the relay are configured for producing the time delay for keeping the music switched ON. Link
Parts List
R1, R2, R4, R5 = 1K
VR1 = 100K,
D1, D2 = 1N4007,
C1, C2 = 100uF/25
T1, T3 = BC547,
T1, T3 = BC547,
T2 = BC557
Z1 = 3V/400mW
Transformer = 0-12V/500mA,
S1 = Bell Push
IC = UM66
Power supply with driver TEA1507
Power supply with driver TEA1507 is mostly used by TV branded PHILIPS. Power Supply has an efficiency rate of up to 90% - thus requiring less cooling, as well as stand-by power required is less than 1 watt.
Power Supply with TEA driver is equipped with a variety of surge protector that has a high reliability - not easily damaged if any part of a damaged power supply circuit and power transistor or FET heat is not easily damaged. Power supply circuits are dapatapat working on ac input voltage between 85 up to 275v. The way it works with the driver circuit power supply TEA 1507 is quite simple, so easy tracking of damage to the circuit.
The picture above is the basic power supply circuit with TEA1507
2x12 W hi fi audio power amplifiers with mute
General Description for TDA2616Q:
Features:
• Requires very few external components
• No switch-on/switch-off clicks
• Input mute during switch-on and switch-off
• Low offset voltage between output and ground
• Excellent gain balance of both amplifiers
• Hi-fi in accordance with IEC 268 and DIN 45500
• Short-circuit proof and thermal protected
• Mute possibility
Circuit diagram for TDA2616:
Datasheet for TDA2616: Download
The TDA2616 and TDA2616Q are dual power amplifiers. The TDA2616 is supplied in a 9-lead single-n-line (SIL9) plastic power package (SOT131), while the TDA2616Q is supplied in a 9-lead SIL-bent-to-DIL plastic power package (SOT157). They have been especially designed for mains fed pplications, such as stereo radio and stereo TV.
Features:
• Requires very few external components
• No switch-on/switch-off clicks
• Input mute during switch-on and switch-off
• Low offset voltage between output and ground
• Excellent gain balance of both amplifiers
• Hi-fi in accordance with IEC 268 and DIN 45500
• Short-circuit proof and thermal protected
• Mute possibility
Circuit diagram for TDA2616:
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| 2x12 W hi-fi audio power amplifiers with mute TDA2616 |
Datasheet for TDA2616: Download
Sunday, August 31, 2014
Transistor checker tool with circuit
The above sequence is a circuit of development of the transistor circuit tester before, which of course added few more components , and resulting in even be better. Examiners transistor circuit above only knows his gain is only on the collector . In addition to well known techniques of data materials used therein . That is , if the elements germanium and the like which are in the tool is still functioning or vice versa.Part List :R1=330R/0,5WR2=27KR3=1KR4=1KR5,R6=5K6C1=1uFC2=2,2uFQ1=Socket transistorT1=Transformator output (OT)S1=Switches frictionG1=3VX1-1,X1-2=Speaker connectorHow to test :Emitter associated with foot condensator and resistor R4, Base is connected with one leg transformer OT , The Collector is connected to the foot of R2 and R3. If you hear a hiss , the sound in few seconds it still has not changed means that transistor still disqualify technical data.
12W single ended car radio power amplifier with diagnostic interface
General Description for TDA8565Q:
Datasheet for TDA8565Q: Download
The TDA8565Q is an integrated class-B output amplifier in a 17-lead DIL-bent-to-SIL power package. It contains 4 × 12 W single-ended amplifiers.
Features of TDA8565Q:
- Requires very few external components
- High output power
- Fixed gain
- Diagnostic facility (distortion, short-circuit andtemperature detection)
- Good ripple rejection
- Mode select switch (operating, mute and standby)
- Load dump protection
- AC and DC short-circuit safe to ground and to VP
- Low power dissipation in any short-circuit condition
- Thermally protected
- Reverse polarity safe
- Electrostatic discharge protection
- No switch-on/switch-off plop
- Flexible leads
- Low thermal resistance
- Identical inputs.
Circuit digram for TDA8565Q:
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| 12W single-ended car radio power amplifier with diagnostic interface |
Datasheet for TDA8565Q: Download
Where you can buy:Aliexpress
Saturday, August 30, 2014
Schematic Power Amplifier with adjusting voltage
Power amplifier using IC TDA1013 , minimum require voltage 15 volt and maximum voltage 35 volt . But you can adjust supply voltage with potentio meter 10K Ohm . Maximum power output 12 Watt with impedance 4 Ohm.
See schematic power below :
- Tuner
- Tape
- CD
- DVD
- MP3,MP4,MP5 Player
- PC
- etc.
20W Surround audio amplifier with SI 1020G
Below schematic audio amplifier with IC SI1020G
Part List
R1 = 100K
R2 = 1R
C1 = 2u2F
C2 = 100uF
C3 = 47uF
C3 = 47uF
C4 = 10uF
C5 = 2200uF
C6 = 47uF
C5 = 2200uF
C6 = 47uF
C7 = 100uF
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