Showing posts with label power supply. Show all posts
Showing posts with label power supply. Show all posts

Electronics LM317 Simple Audio Amplifier

Circuit LM317 Simple audio amplifier schematics Circuit Electronics,
You most likely know that LM317 IC is applied as an practical provide regulator, but did you know it can be applied as an audio amplifier? This is a Low power Amplifier LM317 Simple audio amplifier Circuit a audio  designed with LM317 that offers a optimum probable 1W audio strength.

LM317 Simple audio amplifier Circuit Diagrams :









LM317 Simple <a href='http://audio.corcuitlab.org' title='audio circuits'>audio</a> <a href='http://www.circuitlab.org/search/label/amplifier' title='amplifier circuits'>amplifier</a> Circuits
LM317 Simple audio amplifier Circuits

Utilization a amazing heatsink for the LM317 IC and modify the 5K various resistor so that you have 4.5V on 10Ω resistor (or LM317 pin 2, Vout).

Schematics for LM317 Simple audio amplifier Circuit Electronics
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Electronics 1500W Stereo Power Amplifier Schematic

Circuit 1500W stereo Power amplifier Schematic schematics Circuit Electronics,
Circuit Power amplifier has a power output of up to 1500W RMS power amplifier circuit is often used to power sound systems keperlun for outdor. In the final image can be seen a series of power amplifiers using 10 sets of power transistors for the ending.

This power amplifier circuit using a transistor amplifier from the front, signal splitter, driver and power amplifier. Current consumption required is quite large power amplifier that is 15-20 A 1500W power amplifier circuits for this. Supply voltage needed by the power of this amplifier is the optimal working order symmetrical 130VDC (130VDC-130VDC ground). 1500W amplifier circuit below is a picture series of mono, stereo if you want to make it necessary to make two copies of the circuit. For more details can be viewed directly image the following 1500W power amplifier circuit.

The series of High Power amplifier 1500W With Transistor

Click Image to view larger


In the above series of power amplifer 1500W is equipped to control a DC Offset function to set the power amplifier is turned on at the moment and with no input signal then the output should be 0VDC. Then also equipped with a flow regulator to the power amplifier bias. Final part of this power amplifier requires adequate cooling to absorb the heat generated. Power amplifier is not equipped with a speaker protector, therefore it is necessary diapsang protector on the speaker output so that when the power amplifier is not the case turned on the beat to the speaker that can damage the speaker.

Schematics for 1500W stereo Power amplifier Schematic Circuit Electronics
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Electronics Tone Control Circuit

Circuit Tone Control Circuit schematics Circuit Electronics,
3 Band Tone Control circuit uses an op-amp as an amplifier end. Tone Control circuit is a regulator of tone bass, midrange and treble or 3 band called because it can set the three tones. Filter circuit is applied to the series of "Tone Control 3 band" This type baxandal like the title of this article. 

Results filtering regulator tone or tone control baxandal type is good, because there is no signal level is wasted directly into the ground. Range frequency tones generated from Tone Control 3 band was determined by the configuration of the R and C of the filter section baxandal. As an amplifier on Tone Control The set of three band use traditional IC LF351 has slewrate high and high input impedance. For more details, series 3 Band Tone Control as follows.


Figure Series 3 Band Tone Control



3 band tone control


3 Band Tone Control circuit above using LF351 Op-Amp is used to strengthen the signal after filtering by the filter process baxandal. Level tone Bass, Midrange and Treble settings are determined by potensio R1, R2 and R3. Frequency filter in the circuit above baxandal to 50 Hz bass tone, tone Midrange 1 KHz and 10 KHz for Treble tone.

Schematics for Tone Control Circuit Circuit Electronics
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Circuit Battery Charger 24V 2A Schematic Diagrams

Circuit battery Charger 24V 2A schematics Circuit Electronics,

Schematics for battery Charger 24V 2A Circuit Electronics
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Circuit Power Supply ATX " LM 494 " Schematic Diagrams

Circuit power supply ATX " LM 494 " schematics Circuit Electronics,

Schematics for power supply ATX " LM 494 " Circuit Electronics
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Circuit Bench Top power Supply 30V 10A Schematic Diagrams

Circuit Bench Top power supply 30V 10A schematics Circuit Electronics,

Schematics for Bench Top power supply 30V 10A Circuit Electronics
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Circuit Power Supply Power Amplifier Schematic Diagrams

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Circuit Power Supply 0-30V 20A " IC LM 338 " Schematic Diagrams

Circuit power supply 0-30V 20A " IC LM 338 " schematics Circuit Electronics,

Schematics for power supply 0-30V 20A " IC LM 338 " Circuit Electronics
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Circuit Power Supply 13,8V 8A for Mobile / HT Schematic Diagrams

Circuit power supply 13,8V 8A for Mobile / HT schematics Circuit Electronics,

Schematics for power supply 13,8V 8A for Mobile / HT Circuit Electronics
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Circuit Power Supply Single to Split Schematic Diagrams

Circuit power supply Single to Split schematics Circuit Electronics,

Schematics for power supply Single to Split Circuit Electronics
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Circuit Automatic Charger for Battery Schematic Diagrams

Circuit Automatic Charger for battery schematics Circuit Electronics,

NB :  - AC in dihubungkan dengan jala2 PLN
         - AC 1 dan 2 di hubungkan ke Trafo / Rangkaian charger
         - Output Rangkaian Charger dihubungkan ke VE + dan VE -
            yang tegangan outputnya telah di sesuaikan dengan
            tegangan battery yang akan di charger
        
      
Schematics for Automatic Charger for battery Circuit Electronics
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Electronics 3W Stereo Amplifier schematic

Circuit 3W stereo amplifier schematic schematics Circuit Electronics,
3 Watt stereo amplifier circuit using MAX 7910 IC. The MAX9710 a stereo audio power amplifier IC capable of delivering 3Watts of out put to 4 Ohm loads. MAX9710 can be operated from a single 4.5V to 5.5V power supply , makes it ideal for hand held applications.The IC for 3 Watt stereo amplifier circuit also features thermal overload protection.


Circuit Schematics 3 Watt  Stereo amplifier MAX 7910










3 Watt <a href='http://www.circuitlab.org/search/label/stereo' title=' stereo circuits'>stereo</a> <a href='http://www.circuitlab.org/search/label/amplifier' title='amplifier circuits'>amplifier</a> circuit
3 Watt stereo amplifier circuit


This 3 Watt stereo amplifier circuit  is suitable for small power audio devices such as radio sets and portable CD players. 5 V DC equalizer is used for powering the 3 Watt stereo amplifier circuit. 6V battery with an IN 4007 diode series to the positive terminal of it can also be used instead of 5 V DC supply. The 3 Watt stereo amplifier circuit will get a supply voltage approximately 5 V after 0.7 V voltage drop across diode.


Schematics for 3W stereo amplifier schematic Circuit Electronics
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Electronics 200W Stereo High Power Amplifier LM3886

Circuit 200W stereo High Power amplifier LM3886 schematics Circuit Electronics,
This audio amplifier designed uses two LM3886 per channel, in parallel circuit, based on the PA100 parallel amplifier detailed in National Semiconductor's application note - AN1192. This amplifier can deliver about 50W into a 8-ohm speaker and 100W into a 4-ohm speaker. This is a stereo amplifier and therefore 4 LM3886s are used.


High Power AmplifierThe LM3886 circuit is in a non-inverted configuration, so the input impedance is determined by the input resistor R1, i.e. 47k. The 680 ohm and 470pF resistor capacitor filter network is used to filter out the high frequency noise at the RCA input. The 220pF C4 and C8 capacitors are used to shot out the high frequency noise at the LM3886 input pins.


I used high quality audio grade capacitors at several locations: 1uF Auricap at the input for DC blocking, 100uF Blackgate for C2 and C6, and 1000uF Blackgate at the supply filter.









LM3886 Power <a href='http://www.circuitlab.org/search/label/amplifier' title='amplifier circuits'>amplifier</a> Schematics
LM3886 Power amplifier Schematics

The PCB is designed in a way that the power ground is separated from the signal ground, as you can see from the below layout. The signal ground is located in the middle and surrounded by the power ground. There is a thin trace near C5 connecting them. The PCB layout is done by using PADS PowerPCB 5.0. I think it is a powerful layout software.

Amplifier Printed Circuit Board (PCB)









Amplifier Printed Circuit Board
Amplifier Printed Circuit Board Bottom










Amplifier Printed Circuit Board
Amplifier Printed Circuit Board Top










Amplifier Printed Circuit Board
Amplifier Printed Circuit Board

Amplifier Power Supply
The equalizer used is a regulated power supply. I used 10000uF per rail before the LT1083 regulator. After the regulator, I have 100uF on the regulator board. The advantage of using regulator is that the equalizer ripple voltage is removed. If power regulation is not used, I can hear very little 50/100Hz hum from the speaker.

The high current MUR860 diode is used to ensure high current flow. The voltage regulator used is LT1083, it can provide about 8A of current. Transformer used here is a 500VA 2x 25V. The equalizer is then regulated by 2 LT1083, after the regulation, the voltage is 30V.









Power Supply Recomended

I did some DC measurement and the result is quite good, I got 7 mV of DC offset at the speaker terminal. The voltage difference between the output of the 2 chips is less then 1 mV.

The sound of this amplifier is similar to my LM3875 amplifier, which is very clean and detail. It has no hum, no hiss and no noise. Compared to the LM3875 Gainclone, this amp can deliver twice the power to my 4-ohm speaker, and it improves the dynamics and bass punch a lot.

Source :http://www.shine7.com/audio/pa100.htm


Schematics for 200W stereo High Power amplifier LM3886 Circuit Electronics
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Electronics Troubleshooting STR IC Regulator Power Supply

Circuit Troubleshooting STR IC regulator equalizer schematics Circuit Electronics,
A. Unable to start.
Can be caused by:
  • No start-up voltage supply Vcc or a voltage less than 16V
  • Electrolityc Capacitors supply voltage Vcc filter dry.

  
2. Led indicator blinking
If the supply voltage Vcc examined rocking. This is because the regulator of life and death because OVLO work., Die-protectionist regulators and auto start life over and over. If it is turned off Electrolityc Capacitors  usually still keep the rest of the cargo.
Can be caused by:

  • Electrolityc Capacitors supply voltage Vcc filter on a pin-4 dry. Replace with a value equal to or slightly larger. - triger UVLO
  • input filter capacitor on pin-1 feed dry behind the declining value - triger OLP
  • Rectifier diode of the switching transformer is damaged (sometimes when examined with avo-meter looks like a still good)
  • cause the supply voltage Vcc drops of the switching transformer (UVLO)
  • Part damage or broken lines on the feedback circuit of the voltage regulator through B to photocoupler - triger OVP
  • Electrolityc Capacitors dry filter voltage B - triger OVP
  • One of the output voltage of the switching transformer secondaries there is a short (over load) - triger OLP
  • Soft start capacitor value decreases - triger OLP

3. Noise arising (noise)
Can be caused by:

  • Transformer windings slack.
  • If there are ceramic capacitors - can sometimes cause interference noise due to its characteristic piezoelectrik like crystal resonator. Replace with film capacitors.

4. When the st-by normal stress. But when the power is on the regulator directly off protectionism no voltage on the secondary this part. Electrolityc Capacitors  are still storing charge.
Can be caused by:

  • Sensor OVP small value resistor on pin-2 to the ground so that the value of delayed triger to OLP or OCP.
  • Regulator IC is damaged

---------------------------------------------------------------------------------------------------------------------------
Note: Be careful when the regulator is not working. Because of Electrolityc Capacitors  may still have a charge when turned off.

Schematics for Troubleshooting STR IC regulator equalizer Circuit Electronics
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Electronics Workings of STR IC Regulator Power Supply

Circuit Workings of STR IC regulator equalizer schematics Circuit Electronics,
The meaning STR in this article for example is a Sanken regulator series and Fairchild series STR-F/G/W KA05Q Is an ic Quasy Resonant Flyback (QRF) Swiching regulator comprising (a) control IC and (b) power MOSFETs that are packed into a single unit. The regulator is designed so that only requires a few external components.

How it works :

A. UVLO (under voltage lock out)

Regulators will start working when the voltage Vcc start-up on pin-4 reaches 16V. Once the equalizer voltage Vcc further work will be reimbursed through a switching transformer supplied from a diode rectifier. At the time the circuit was working when the voltage Vcc is less than 15V, the regulator controls will still work. regulator will stop working (protectionism) if the supply voltage Vcc drops to less than 11V.


2. Feedback control (pin-1)

Workings of <a href='http://www.circuitlab.org/search/label/regulator' title='regulator circuits'>regulator</a> ic STR
PWM regulators work using the system, wherein the output voltage B + to stable controlled by the feedback circuit of the output voltage B + >>> >>> photo-coupler pin-1. A capacitor mounted on the pin-1 is used to prevent noise disturbance if anyone does not interfere with the working system.


3. Soft start (pin-5)

When the power is turned on first, then the circuit has not been working behind the Uman because there is no output voltage B +. This causes a heavy current on the MOSFET start. To prevent this, the regulator is equipped with soft start circuit internally and an external filter kapasitr.

If the equalizer is used to monitor for example, the frequency of the regulator needs to be synchronized. External synchronization signal can be input through pin-5's


4. Protectors

Regulators are equipped with all sorts protector.



  • Over-current protector (OCP) or Over Load protector (OLP). For example, if there is damage to flyback or def yoke, it will cause the load voltage B + over. If there is such a case the regulator will die protectionism so that IC is not damaged. For over current sensor is a resistor with a small value that is placed on pin-2 to the ground.

  • Short protector. If the output voltage B + short, the regulator turns off protectionism.

  • Over-voltage protectors (OVP). Regulators are not equipped with a surge protector so if the feedback path disconnected can cause the output voltage of the transformer switching regulator power up or damaged .. With OVP protectionist regulator will die if the voltage supply Vcc pin-4 rise above 22.5v.

  • Thermal protector. Regulators will stop working if the temperature reaches 140 degrees Celsius.


6. Auto start.

Regulators will start automatically if the auto turns itself (protectionism) after OVP or OCP


read also ->>>> Troubleshooting STR IC regulator Power Supply

Schematics for Workings of STR IC regulator equalizer Circuit Electronics
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Electronics How Regulator with 2 Photocoupler

Circuit How regulator with 2 Photocoupler schematics Circuit Electronics,
Working of regulator with 2 Photocoupler that is :
  • Photocoupler N901 - used as a coupling-off control on the regulator by mikrokontrol. Which is set high and low voltage B + (st-by at the B + voltage is low). Control of the pin-37 POWER mikrokontrol → V610 → VD913 V908 → N901.
  • Photocoupler N903 - used to control on-off the regulator of X-ray circuit protector. X-ray protector circuit of flyback → VD451 → VD452 → SCR VS472. If the flyback voltage regulator over the job will automatically be turned off by N903
  • To disable the X-ray circuit protector, it can be temporarily removed photocoupler N903 first. In normal conditions the voltage at the transistor V474 should be zero.

Regulator Schematics with 2 photcoupler
Regulator Schematics
Trobelshuting there is no voltage for 5v st-by on the secondary :

Regulator Schematics 5 V
  1. Disable by removing the first circuit protectors N903
  2. Check the voltage of 300V
  3. Check all transistors
  4. Check the start voltage of 300V by R909 &gt;&gt; R906 to the base of transistor power regulator
  5. Check the feedback C910 &gt;&gt; R904 (to oscillate)

Schematics for How regulator with 2 Photocoupler Circuit Electronics
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Electronics Type of UPS | Uninterruptible Power Supply

Circuit Type of UPS | Uninterruptible equalizer schematics Circuit Electronics,
UPS design of the model is divided into several types that produce different performance characteristics:

A. Standby

2. Line Interactive

3. Double Conversion On-Line

4. Delta Conversion On-Line

Standby UPS types
This type is commonly used by home users for the Presidency with their PC. UPS to be able to do this type of filtration against power failures and flow management, in addition to design efficient, small size and inexpensive.


Line Interactive UPS types

Type of UPS | Uninterruptible <a href='http://www.circuitlab.org/search/label/power supply' title='power supply circuits'>equalizer</a> UPS is the type most often used in small business unit, web developer, and a number of servers located in government departments. Because, in addition to having high levels of reliability, this type also have the ability to adjust the voltage that is sufficient

fine.

UPS has an inverter is always connected to the output of the UPS system to convert the power from batteries into AC. In normal circumstances, the inverter will perform battery charging. While in a state of power outages, Transfer switch will close and drain power from the batteries to the UPS output. Position that is always connected to the inverter output filter provides additional power. This makes the type of UPS is widely used for server and electrical conditions are not too good.


Double Conversion type UPS On-Line

This type is most common for UPS with power more than 10kVA. These types have in common with the type of Standby. Only this type has a power source located on the inverter, not the AC power source. In this type, the main electricity supply interruption will not trigger a transfer switch for the incoming AC power to the central input to charge the batteries that provide power to the inverter located at the output. Therefore, when the AC power is disconnected, the flow of energy will be transferred immediately without taking a break when the transfer occurs. This type of UPS above shows the performance of the average. Can be said of this type of approach the ideal of a UPS, unfortunately this type of heat is high enough.


UPS type Delta Conversion On-Line

Almost the same as the Double Conversion type, type Delta used to always supply voltage Inverter. When the equalizer is interrupted, this type do the same with Double Conversion type. Delta Conversion has two functions, the first is to control the input power characteristics. While the second function is to control the input current to direct the process of charging the battery system. The thing to remember is to minimize this type of energy is wasted. In addition, it has a high compatibility to various types of generators and reduce the need for the use of cables.

Schematics for Type of UPS | Uninterruptible equalizer Circuit Electronics
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Electronics Parts of the UPS (Uninterruptible Power Supply)

Circuit Parts of the UPS (Uninterruptible Power Supply) schematics Circuit Electronics,
Uninterruptible Power Supply
UPS is basically composed of three main components, namely:
1) Rectifier-Charger
This section is used to transfer circuit and battery charging. Rectifier-charger circuit block is going to supply the power needed by the inverter under full load and at that time to maintain the charge in the battery. Besides these blocks must have the ability to drain the power output of 125-130%.

Characteristics of the batteries also need to be taken into account in its charger circuit design because if a rechargeable battery with a current that exceeds the capacity limit will be able to shorten the life of the battery. Usually for a battery charging current to the UPS is 80% of current conditions issued by the batteries at full load.
Limitation of a UPS system is good by the standards of NEMA - National
Electical Manufacturer Association - is able to provide 100% power continuously (continuous load) and 2 hours at 125% load without a decrease in performance (damage). The battery can still be categorized as unfit for use if the condition is still capable of providing 100% power for 1 hour if the time of filling for 8 hours (determined by the manufacturing
battery).

The quality of the inverter is a determinant of the quality of power generated by a UPS system. inverter function to change the DC voltage of the rectifier-charger circuit into AC voltage signal in the form of a sine wave formation and after going through the filter circuit. The resulting output voltage must be stable both voltage amplitude and frequency, low distortion, there are no voltage transients.
In addition, the inverter system needs a feedback circuit (feedback) and the regulator circuit to maintain constant voltage to be obtained.

3) switch Shifters (Transfer switches)
Transfer switch is divided into two types, namely electromechanical and static. Electromechanical switch uses relays to get one of the supply voltage terminal and the other from the UPS system. Static switch system using semiconductor components, such as SCR.
The use of SCR would be better because of the removal operation is performed with the SCR takes only 3 to 4 ms, while the electromechanical switch is about 50 to 100 ms.
The use of UPS is done by connecting the UPS to the AC input and output PLN UPS to the load. Most UPS are used to supply the computer, because if the source of PLN suddenly dies, then the data being processed is not lost but is still in the back-up by UPS, so there's still time to save data.

Schematics for Parts of the UPS (Uninterruptible Power Supply) Circuit Electronics
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