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| LCD Monitor Power Supply Repair | | 2008-07-11 22:52:06 | | Troubleshooting TFT or LCD monitor switch mode power supply is easier than the crt monitor. It is small and compact and usually have only one output which is 12 vdc from 2 amp to 4 over ampere. Some design of lcd flat panel or flat screen monitor power supply are built into the mainboard while the other [...]... | | By: LCD Monitor Service | | |
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| Just a Bloody Simple Negative Power Supply | | 2008-06-18 15:53:05 | | Are you really frustrated at the time you’re cannot find the suitable and simple negative power supply when you need it the most?
Well, isn’t doing an electronic project should be a fun test? You can immediately change the above unhappy moment into a joyful moment.
How? Well, all you have to do is create the simple [...]... | | By: Scienceprog - Embedded Related Info | | |
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| Laboratory Power Supply Variable Voltage 0-50V 1A | | 2008-03-27 00:55:59 | | Laboratory Power Supply - Variable voltage from 0V to 50V and variable current from 0A to 1A
Reverse engineered circuit diagram of an expensive commercial variable lab power supply. This unit is designed around an ordinary op-amp and easy to obtain parts. Although the unit uses a single transformer with two output windings the circuit works [...]... | | By: Circuit Project Electronic | | |
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| Mini Drill power supply | | 2008-03-25 20:14:23 | | T1 steps down AC voltage from 115VAC (or 220VAC) to about 8VAC and is then rectified via bridge rectifier BR1 to about 11.52Vdc. C1 filters off the AC ripple. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals. Value can be between 10 and 100uF/25V. The output voltage [...]... | | By: Circuit Project Electronic | | |
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| power supply 300V, 50mA + 6.3V, 3A max | | 2008-03-25 02:54:17 | | This regulated power supply was built as a simplified outboard version of a PSU in my first phono stage. Replacing hexfreds with tube rectifier eliminates the need for power-on sequencing. Chassis (salvaged from a hospital laser PSU) size is 180W*240D*100H mm with a 125W double-C core power transformer and a 10H/100mA choke inside.
Read More Source:
http://english.cxem.net/amplifier/amplifier45.php
Thank [...]... | | By: Circuit Project Electronic | | |
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| 90w Power Supply | | 2008-03-24 21:12:15 | | The IRISMPS5 is an open frame 90W Flyback power supply unit (psu) using the IRIS4015 Integrated switcher. This demo board aims to show the capability of the IRIS4015 to handle the upper level of flyback topology power range, without the strict standby power requirement.
Read More Source (PDF)
http://www.irf.com/technical-info/refdesigns/irismps5.pdf
Thank you.
switching power supplyShare This... | | By: Circuit Project Electronic | | |
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| Single IC, 5 Output Switching Power Supply | | 2008-03-23 21:09:13 | | This Design Note describes how to generate five separate output voltages using the LTC®1538-AUX, a dual synchronous switching regulator controller with internal circuitry adaptable to many additional configurations.
Read More Source:
http://www.linear.com/pc/downloadDocument.do
?navId=H0,C3,P1179,D4356
Thank you.
switching power supplyShare This... | | By: Circuit Project Electronic | | |
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| Current Limiting Bench Power Supply for L200 | | 2008-03-22 01:54:05 | | This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a project for the first time or soak-test a piece of equipment.
SW3 is the on/off switch. It also lets you choose [...]... | | By: Circuit Project Electronic | | |
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| LOW POWER 12,000 VOLT POWER SUPPLY | | 2008-03-21 00:05:46 | | If you need about 12,000 volts DC for an ion generator this circuit might be the ticket. It draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil. The output signal is isolated from the power line. Although the circuit can only deliver about 5uA of current it [...]... | | By: Circuit Project Electronic | | |
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| Uninterruptible Alarm Power Supply by 7805 | | 2008-03-19 23:02:27 | | Although this Power Supply was designed for the Modular Burglar Alarm - it has other applications. It provides an output of 12-volts - at a current of up to 1-amp. In the event of a mains failure - the back-up battery takes over immediately. And when mains power is restored - the battery recharges automatically.
The [...]... | | By: Circuit Project Electronic | | |
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| Non-isolated Off-line AC to DC Power Supply | | 2008-03-18 03:49:40 | | This compact efficient circuit can provide up to 100ma of a regulated 5 volts from an AC power source ranging from 20vac to 120vac.
Read More Source:
http://www.discovercircuits.com/DJ-Circuits/offline5v.htm
Thank you.
Converter circuit, Power supply circuitShare This... | | By: Circuit Project Electronic | | |
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| Bench Power Supply by PIC16F870 | | 2008-03-17 21:04:59 | | This unit delivers 0 to 20 volts at up to 4 amps in 0.1 volt increments. The entire device runs on a PIC16F870 (about $3 in small quantities). This is basically a switching power supply with the voltage regulation done in software. The PIC used here has analog inputs (used to measure [...]... | | By: Circuit Project Electronic | | |
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| Tera Ohm Meter - Power Supply by ICL7650 | | 2008-03-14 22:22:00 | | The parts list which is not in the circuit is listed below, the circuit is 15 years old so you may have problems getting the parts, but you may get some idea on high resistance measurement.
IC1 ICL7107 A/D converter 31/2 intersil maxim
IC2 ICL7650 chopper stabilized amplifier intersil maxim analog
IC3 CA3140 any opamp Texas Instruments
IC7 IC9 [...]... | | By: Circuit Project Electronic | | |
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| 1-kV switching power supply | | 2008-03-13 21:38:27 | | Designing a high-voltage switching power supply that can produce a sustained arc can be challenging. This compact and efficient design delivers 1 kV at 20W and can withstand a continuous arcing, or short-circuit, condition (Figure 1). It uses standard, commercially available components. R1 sets the LTC1871 switching-regulator controller for a nominal operating frequency of 120 [...]... | | By: Circuit Project Electronic | | |
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| Switched-mode power supply | | 2008-03-10 00:37:22 | | A switched-mode power supply, switching-mode power supply or SMPS, is an electronic power supply unit (PSU) that incorporates a switching regulator. While a linear regulator maintains the desired output voltage by dissipating excess power in a "pass" power transistor, the SMPS rapidly switches a power transistor between saturation (full on) and cutoff (completely off) with a variable duty cycle whose average is the desired output voltage. The resulting rectangular waveform is low-pass filtered with an inductor and capacitor. The main advantage of this method is greater efficiency because the switching transistor dissipates little power in the saturated state and the off state compared to the semiconducting state (active region). Other advantages include smaller size and lighter weight from the elimination of low frequency transformers which have a high weight and lower heat generation from the higher efficiency. Disadvantages include greater complexity, the generation of high amplitude... | | By: Free Download Books | | |
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| An Adjustable Breadboard Power Supply by LM317 | | 2008-03-09 21:25:41 | | This Instructable will show you how to build an adjsutable breadboard power supply entirely from Radioshack parts. It can provide multiple voltages directly to the power rails on a prototyping breadboard. This could be useful for people on a low budget, who don’t like to order parts online, or who need a good weekend project.
Read [...]... | | By: Circuit Project Electronic | | |
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| 5V 3A Regulate power supply by TIP2955 | | 2008-03-05 23:28:11 | | If you require more than 1 amp, the 7805 can be combined with other components to provide an output of up to 3 amps, with the circuit below. The current is switched through the TIP2955, so the 7805 can be run without a heatsink since it only regulates the voltage. Note the 3-amp diodes in [...]... | | By: Circuit Project Electronic | | |
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| +25V -25V DC Power Supply | | 2008-03-05 09:35:22 | | The schematic below shows how the +25V DC and -25V DC are obtained. In order to provide power supply for 2 stereo amplifiers, a power transformer rating of 80VA with 240V/36V centre tapped secondary winding is used. The secondary output of the transformer is rectified by using four 1N5401 diodes together with 4 electrolytic capacitors [...]... | | By: Circuit Project Electronic | | |
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| Bread Board Power Supply by LM317 | | 2008-03-03 21:11:42 | | uCHobby’s first electronics kit is a handy breadboard power supply. The power supply design is simple but just what I needed for my electronics projects. I have seen several similar power supply boards but none had all the features I wanted. This design was also a good first project to help me learn about Kicad.
Read [...]... | | By: Circuit Project Electronic | | |
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| power supply +20V and -20V 5A by LM338 | | 2008-03-02 23:51:37 | | Here is Circuit power supply +20V and -20V 5A,Use IC LM338.
Nick initially adjusted the quiescent current to 3.5A but found after listening tests that increasing this to 4A gave a noticeable improvement. Even at an Iq of 4A the amps run cool due to the substantial heatsinking (0.5degC/W for each output device and each LM338K). [...]... | | By: Circuit Project Electronic | | |
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| ultra-regulation power supply +24V -24V by LM317,LM337 | | 2008-03-01 22:31:02 | | The ultra-regulation of the power supply +48VDC,+24VDC,+16.4VDC is so over the top and unnecessary that most, if not all, people building this amplifier would not even notice the difference. However there are a number of benefits to this design. First its a dual tracking design. Because the open loop gain of the amp is low, [...]... | | By: Circuit Project Electronic | | |
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| Simple power supply by FET BUZ350 | | 2008-03-01 10:33:07 | | Here the circuit has been modified to include a very simple voltage regulator. This will give an output voltage between 0 volts and 15 volts. The power output transistor must be fitted to a heatsink. Again, NO OUTPUT CURRENT LIMITING is provided so care is still needed. All the component values not marked are the [...]... | | By: Circuit Project Electronic | | |
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| Dual Power Supply 24V and 12V unregulator | | 2008-02-22 23:34:07 | | There are two power supplies: one version for the amplifier and muting timer The power transformer secondary supplies about 18Vrms, so the V+ rail is about 24VDC, adequate also for hi-Z headphones. I don’t like regulated power supply units for this kind of circuits, so a simple Pi filter is employed here, made by [...]... | | By: Circuit Project Electronic | | |
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| Single Chip dual power supply +12V -12V by LM326 | | 2008-02-22 22:56:54 | | This is idea circuit dual power supply +12V -12V by LM326 Single Chip IC.
I want to know the single IC which can provide Both + V and -V from a single +Vin supply.. I need this for my dual supply opamp.Reply me as soon as possible.
Read More Source:
http://www.delabs-circuits.com/mailfaq/arc20061210.html
Thank you.
Power supply circuitShare This... | | By: Circuit Project Electronic | | |
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| Small Variable Power Supply by LM723 | | 2008-02-21 21:49:44 | | Features: 1.3-12.2 V, 1 A, over-current protection. This is a simple but reliable device based one of the oldest integrated voltage regulators of them all - the LM723.
R2 sets the output voltage. The maximum current is determined by the value of R3: the over-current protection circuitry inside the LM723 senses the voltage across R3 and [...]... | | By: Circuit Project Electronic | | |
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| Autoformer Switch-Mode Power Supply | | 2008-02-18 01:55:35 | | This is a small 2*25 (actually, 2*50) WPC amplifier with 3-order crossover stage (configurable as LP or HP). Of particular interest is the unconventional autoformer PS arrangement. Since the power FET’s drains are not tied to ground anymore, it needs another transformer to drive gates. Gate driver is TL494 + MPSW56 followers, powered by REMOTE [...]... | | By: Circuit Project Electronic | | |
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| Simple DC regulated power supply with overcurrent | | 2008-02-15 20:24:27 | | The 15v zener is fed via the 4K7 resistor from the input. With 0.6v across the base - emitter of the PNP transistor, this establishes a voltage of 14.4 across the 3K3, so there must be a current of nearly 4.4mA through the 3K3. This current is available to feed the emitter of the transistor [...]... | | By: Circuit Project Electronic | | |
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| Self-switching Power Supply by 7805 | | 2007-12-19 01:58:27 | | One of the main features of the regulated power supply circuit being presented is that though fixed-voltage regulator LM7805 is used in the circuit, its output voltage is variable. This is achieved by connecting a potentiometer between common terminal of regulator IC and ground. For every 100-ohm increment in the in-circuit value of the resistance [...]... | | By: Circuit Project Electronic | | |
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| 5V 3A switching power supply by LM2576 | | 2007-12-17 08:48:08 | | Here is circuit switching power supply regulator 5V 3A for digital circuit.
Use IC LM2576 DC to DC step down voltage regulator.
Wide input voltage 8Vdc to 40Vdc.
See to circuit for read detail more.
5V, Converter circuit, dc converter step down voltage, dc to dc converter, lm2576, switching power supply, Switching regulatorShare This... | | By: Circuit Project Electronic | | |
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| External Power supply | | 2007-12-02 10:05:09 | | I am making an extended trip to a remote section of a third world country & will be making numerous PowerPoint presentations & can not count on the local "power supply"; therefore I need an external battery pack that will have enough juice to power a projector for the PowerPoint presentation... | | By: CR4: The Engineer's Place for Discussion & New | | |
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| 12V 5A power supply Regulator with LM2678-12 | | 2007-11-24 02:24:05 | | This is circuit Switching power supply 12V 5A. Or circuit dc converterstep down voltage.
Use IC LM2678-12 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator.
Input DC Voltage 40Vmax and 16Vmin 5A. Detail more see in image circuit.
Related Links
More circuit about switching power supply
More circuit about IC LM2678
More circuit about Converter circuit [...]... | | By: Circuit Project Electronic | | |
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| Power Supply for USB Devices | | 2007-11-24 02:05:38 | | More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are also devices that can only be charged via a USB port. That is not surprising in the case of USB MP3 players, which have to ‘dock’ in the PC anyway for [...]... | | By: Circuit Project Electronic | | |
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| 0-1000V Regulated High Voltage Power Supply | | 2007-11-21 10:14:24 | | Another power supply that can be used for the Geiger-Müller tube variant of the cosmic ray muon detector.
If the specific transformer mentioned in the schematic is not available to you, any transformer with the specifications primary 117VAC, secondary 6.3VAC CT (center-tapped) should work.
In this case you might have to choose a different drive frequency in [...]... | | By: Circuit Project Electronic | | |
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| Switching power supply dual voltage 5v and 3.3v by LM2575 LM1117 | | 2007-10-24 19:21:20 | | Here is circuit Switching power supply dual voltage, output 5V 1A and 3.3V 1A.
Use IC LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator ,and IC LM1117 is 800mA Low-Dropout Linear Regulator. Volt suppy 9V - 60V
Detail more see to image circuit.
Related Links
More circuit about switching power supply
13.8V 40A Switching Power Supply By LM3524,LM324
Switching [...]... | | By: Circuit Project Electronic | | |
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| Mosfet stabilized power supply for Tube Amp | | 2007-10-18 17:56:17 | | One very important Part of a Tube Amplifier is the Power Supply. It is crucial for the quality of the whole system. Especially beginners encounter problems like Hum or Drift that can become quite annoying. But resue is ahead: The following circuit uses a modern Mosfet to deliver a stable and virtually Hum-free voltage to [...]... | | By: Circuit Project Electronic | | |
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| Top Linear power supply regulator 5V 5A with 7812 and LM723 | | 2007-09-27 10:53:25 | | This ciruit Top Linear power supply regulator 5V 5A.
It is good power supply circuit than IC 7805+MJ2955( regulator 5V 5A ) .
Use IC 7812 and LM723 regulator IC, Thansistor TIP142 for boost current to 8A max.
P1 for Control Volt output 2.5-7V,Transformer 10A min.
Detail other see in picture citcuit.
5V, LM723, Power supply circuit, power supply high [...]... | | By: Circuit Project Electronic | | |
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| 8V 1A Switching power supply with LM2575 | | 2007-09-25 10:57:13 | | Here is circuit 8V 1A Switching power supply, Use IC LM2575.
Input Volt 10V-40V DC only.
This Citcuit to become for Car or motorcycle,Use Volt 12V-14.4V 2A.
And Volt Output 2.3V-37V change by R1,R2
Detail see in image circuit and PCB.
Source:
http://www.ngc.pe.kr/bbs/zboard.php?id=data_others&no=28
LM2575, switching power supply, Switching regulatorShare This... | | By: Circuit Project Electronic | | |
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| 40V Regulated Power Supply Circuit with LM317T+TIP42 | | 2007-09-24 08:23:58 | | Regulated Power Supply Parts:
R1_______________3R9 1 or 2W Resistor
R2______________22R 1/4W Resistor
R3_______________6K8 1/4W Resistor
R4_____________220R 1/4W Resistor
R5_______________4K7 1/2W Resistor
C1____________3300µF 50V Electrolytic Capacitor (or 4700µF 50V)
C2,C5__________100nF 63V Polyester Capacitors
C3______________10µF 63V Electrolytic Capacitor
C4_____________220µF 50V Electrolytic Capacitor
D1_____Diode bridge 100V 4A
D2___________1N4002 200V 1A Diode
D3______________LED Any type and color
IC1___________LM317T 3-Terminal Adjustable Regulator
Q1____________TIP42A 60V [...]... | | By: Circuit Project Electronic | | |
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| 2-30V 5Amp Power Supply Regulator With LM317,741,2SA1186 | | 2007-09-17 16:43:17 | | Here is Circuit power supply linear regulator. Volt output 2-30V and Current 5Amp. use IC LM317 for Circuit power supply Regulator and Transistor 2SA1186 for Boost up Current from IC LM317 (1.5A) to 5A output.
Detail more read in circuit
Source: http://www.antrak.org.tr/gazete/102003/yilmaz.htm
741, LM317, Power supply circuit, power supply regulator, power supplyShare This... | | By: Circuit Project Electronic | | |
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| 5V -1A Power Supply with LM2575 | | 2007-09-17 14:05:46 | | This circuit is derived from an application note of LM2575, It is a Power Switching Regulator from National Semiconductor.
National Semiconductor The details are here
LM2575
An application note by On Semiconductor shows how this chip can be used to generate Negative Voltage Power Supplies from Positive Voltages.
A Power Transistor which is having a drop of 4 [...]... | | By: Circuit Project Electronic | | |
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| Variable DC Power Supply Voltage range 0.7 - 24V, Current limiting range 50mA - 2A | | 2007-09-17 07:27:32 | | source: RED Free Circuit Designs
Voltage range: 0.7 - 24V
Current limiting range: 50mA - 2A
Parts:
P1____________500R Linear Potentiometer
P2_____________10K Log. Potentiometer
R1,R2___________2K2 1/2W Resistors
R3____________330R 1/4W Resistor
R4____________150R 1/4W Resistor
R5______________1R 5W Resistor
C1___________3300΅F 35V Electrolytic Capacitor (see Notes)
C2______________1΅F 63V Polyester [...]... | | By: Circuit Project Electronic | | |
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| 6V backup battery power supply regulator with IC 7805 | | 2007-09-10 18:19:00 | | This is circuit power supply, 6V backup battery power supply regulator with IC 7805
For inportant circuit, Because this circuit with backup system by Baterry 6V.
Detail read in circuit.
7805, battery, Battery Backup Supply, Power supply circuit, power supply regulator, power supplyShare This... | | By: Circuit Project Electronic | | |
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| Power Supply PC | | 2007-05-21 00:38:51 | |
Joven submitted this cool Power Supply PC mod in the Share a Hack Contest. This would be great to have sitting on my desk!
“I gutted the brand new 300W power supply except for cooling fan, power switch and power plug. The 3 1/2″ form factor board fit perfectly. The gold anodized aluminum heat sinks are one piece, which actually covers the three main chips. Power supply cases really do make the perfect mini-computer case. The Advantech 5820 babyboard sports a “passively” cooled Geode 233MHz processor. It’s hardly passive with that monster fan running. I liked the idea of recycling the power plug and switch too.”
... | | By: Hacked Gadgets | | |
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