Saturday, October 16, 2010

DC Voltage Regulator dual Power Supply +5V to +25V, -5V to -25V 1A with LM7805 LM7905


When you want Dual power supply Variable Regulator be simple. I begs for to advise this circuit, because use the integrated circuit LM7805 and LM7905. Make have Voltage +5V to +25V and -5V to -25V unless. Still pay current get about 1A enough with general usability.


DC Voltage Regulator dual Power Supply +5V to +25V, -5V to -25V 1A with LM7805 LM7905
The important factor is you should use Transformer at enough size doesn’t lower 2A and IC all stick let off the heat with. The detail is other see in circuit picture better sir.

http://www.circuitpowersupply.com/circuitblog/dc-voltage-regulator-dual-power-supply-5v-to-25v-5v-to-25v-1a-with-lm7805-lm7905/

High Current Regulated Supply By LM317 and 2N3055×2



The high current regulator below uses an additional winding or a separate transformer to supply power for the LM317 regulator so that the pass transistors can operate closer to saturation and improve efficiency. For good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors should be close to the output voltage.
High Current Regulated Supply By LM317 and 2N3055×2
The LM317 requires a couple extra volts on the input side, plus the emitter/base drop of the 3055s, plus whatever is lost across the (0.1 ohm) equalizing resistors (1volt at 10 amps), so a separate transformer and rectifier/filter circuit is used that is a few volts higher than the output voltage. The LM317 will provide over 1 amp of current to drive the bases of the pass transistors and assumming a gain of 10 the combination should deliver 15 amps or more.
By Bill Bowden
Source :: http://ourworld.compuserve.com/homepages/Bill_Bowden/page12.htm

Simple DC voltage regulated 0-30V 3A


If you are looking for DC Voltage Reulator be simple. That can give Current tall about 3A and fine voltage get from 0-30V. As a result please consider this circuit before, it is easy. Because of have no the integrated circuit. Use the transistor is a principle especially the number MJ3001.


Simple DC voltage regulated 0-30V 3A
Usability just fine VR1 for control Volt output and choose the value Current get with S1. The detail is other see in the circuit help understand go up sir.

http://www.circuitpowersupply.com/circuitblog/simple-dc-voltage-regulated-0-30v-3a/

Variable Regulater Switching LAB Supply 50V 5A by TL494


Somsak is person see the website of me take an interest try build Variable Regulater Switching LAB Supply. By fine decorate voltage output get 0-50V and fine current get 5A. I then choose this circuit , which use IC TL494 be pillar equipment (Switchmode Pulse Width Modulation Control Circuit).


Variable Regulater Switching LAB Supply 50V 5A by TL494
And use pretty litter transistor number MJ15004 then give current get enough tall. But should choose pot size modifies about 5A go up with. When see the circuit has already may inappropriate with a novice. Because use many equipments then the gift uses the tie perhaps specially with , be lucky sir.
 
http://www.circuitpowersupply.com/circuitblog/variable-regulater-switching-lab-supply-50v-5a-by-tl494/

2N3055 variable supply 0-25V


One your friend beg for model the circuit about variable supply range 0-25V. I tries to search see meet voltage regulators circuits. The this be the circuit that use the transistor 2N3055 numbers are important equipment. Which be the equipment that seek good easy. fine P1 control current output the topmost.And fine P2 control Voltage range 0-25V.


2N3055 variable supply 0-25V
The detail is other invite read in original website http://www.redcircuits.com//Page36.htm

L200 DC Variable power 3-15volt at 2Amp



For the work experiences general that want power supply LAB. I thinks L200 DC Variable power Circuit. May like you , because of give Volt range about 3V-15V and Current 2A normal. When , you see the circuit. May search eyes and the integrated circuit that use be number L200 although old already.


L200 DC Variable power 3-15volt at 2Amp
But still be usable well the interesting. This important circuit that should use Transformer that be appropriate be 12V sizes and should use 2A more than because get current that straight follow want certainly give testimony grandmother horn forget to stick let off the heat gives with, IC L200 with appropriately. The detail is other see in the circuit and from original website
 
http://www.mitedu.freeserve.co.uk/Circuits/Power/l200var.html

10A Variable Regulator power supply with LM350



This be Variable Regulator power supply Circuit. That be High Current Source 10amp. By use the integrated circuit LM350. Which usual it controls Voltage output get 1.2V to 25V and give current about 3Amp.

But when bring parallel 3 pcs. Can give current output be 10Amp max for this circuit. It can adjustable voltage output get 4.5V to 25V at 10Amp. Other detail please see in the website Link.

3-30V 2.5A Stabilized power supply



This is a very useful project for anyone working in electronics. It is a versatile power supply that will solve most of the supply problems arising in the everyday work of any electronics work shop. It covers a wide range of voltages being continuously variable from 30 V down to 3 V.

The output current is 2.5 A maximum, more than enough for most applications. The circuit is completely stabilised even at the extremes of its output range and is fully protected against short-circuits and overloading.
Link

24V Variable DC Power Supply


A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist’s workbench. This circuit is not an absolute novelty, but it is simple, reliable, “rugged” and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A.



Well suited to supply the circuits shown in this website. You can adapt it to your own requirements as explained in the notes below.
Link :

DC Power supply adjust voltage regulator 1.5 Volt - 15Volt 3Amp


I wants DC Power supply adjust voltage regulator 1.5 Volt - 15Volt, and give current about 3 Amp for in the work experiences all electronics. As seek many the circuit , meet that this circuit easily , use integrated number circuit LM1084 for control voltage model regulator adjustable voltage 1.5V - 15V. With fining decorates VR1. And should feedInput AC 18V 3A low like besides should hold let off the heat gives the integrated circuit LM1084 with. For the detail , see in the circuit.


http://www.circuitpowersupply.com/circuitblog/dc-power-supply-adjust-voltage-regulator-15-volt-15volt-3amp/

dc power supply adjustable voltage 0-30 Volt at 2 Amp


When you want DC power supply Circuit , model to fine the value Voltage get 0-30V for apply general work. I thinks this circuit may is appropriate , because of give current get 2 Amp enough be usable experience all get comfortablely. By it uses ordinary equipment seek easy be IC LM723 for control voltage the level is all and systematically protect completely. And still have 2N3055 number transistors help boost current give tall fair the work.



The detail is other , you have can to see in original website http://www.next.gr

Adjustable power supply 0.1V – 50V By CA3130 and 2N3055



This power supply circuit is highly stabilized that its output voltage will drop only 0.005% even though the load changes from 0 to 100%. Another excellent capability is that the output voltage will change only by 0.01% if the input voltage fluctuates. The capability if the circuit to be adjusted from 0.1V up to 50V is due to the application of opamp IC CA3130 in the circuit. Transistor T4 raises the output voltage to higher level, and at the same time it separates the lower level opamp from the high level of the output voltage. The reference voltage is supplied by IC1. It is a temperature compensated transistor array with 5 transistors. Four of these transistors are used as reference diodes and the fifth one sets the output impedance of the reference source.




The reference voltage is set through P1. The opamp CA3130 compares the reference voltage at its minus input to the output voltage at its input. The output voltage passes first through a voltage divider before it is fed into the plus input of the opamp. Transistors T1 and T2 work as darlington pair and amplifies the current. Transistor T3 functions as current limiter. The current limit is ajustable through P1, and the lowest current limit is 0.6 ampere. Once potentiometer P1 is set at maximum, current limiting is disabled.
Source: http://apowersupply.com/adjustable-power-supply-01v-50volts-3.html

2-25V DC Power Supply Schematic by LM338


This DC power supply circuit uses a LM338 adjustable 3 terminal regulator to supply a current of up to 5A over a variable output voltage of 2V to 25V DC. It will come in handy to power up many electronic circuits when you are assembling or building any electronic devices. The schematic and parts list are designed for a power supply input of 240VAC. Change the ratings of the components if 110VAC power supply input is required.




As shown in the figure above, the mains input is applied to the circuit through fuse F1. The fuse will blow if a current greater than 8A is applied to the system. Varistor V1 is used to clamp down any surge of voltage from the mains to protect the components from breakdown. Transformer T1 is used to step down the incoming voltage to 24V AC where it is rectified by the four diodes D1, D2, D3 and D4. Electrolytic capacitor E1 is used to smoothen the ripple of the rectified DC voltage.
http://www.circuitpowersupply.com/circuitblog/2-25v-dc-power-supply-schematic-by-lm338/

Negative Adjustable Power Supply Module by LM337


This power supply circuit module is a compact, easy to build. It uses negative variable power supply module. This power module is ideal for powering any application requiring a DC supply at current levels up to 1.5A.Diodes D1-4 form a bridge rectifier which converts the AC input voltage into a DC level. They also allow a DC input voltage to be connected either way around. Capacitor C1 smooths the DC output of the bridge whilst C2 provides high frequency decoupling. The LM337T is an adjustable regulator IC providing the desired output
voltage.



Diode D5 is reversed biased during normal operation and is used to protect the regulator if the output is connected to a voltage of the same polarity (eg battery). Diode D6 protects the regulator if a reverse polarity voltage is connected to the output.
Source:http://powersupplycircuit.blogspot.com
http://powersupplycircuit.blogspot.com/2009/02/negative-adjustable-power-supply-module.html

Mini Bench Power Supply by LM324-BUZ22



The power supply described here is a simple unit, easily constructed from standard components. It is only suitable for small loads but otherwise has all the characteristics of its bigger brethren. Between 18 V and 24 V is applied to the input, for example from a laptop power supply. This avoids the need for an expensive transformer and accompanying smoothing. No negative supply is needed, but the output voltage is nevertheless adjustable down to 0 V.



A difficulty in the design of power supplies with current limiting is the shunt resistor needed to measure the output current, normally connected to a differential amplifier. Frequently in simple designs the amplifier is not powered from a regulated supply, which can lead to an unstable current regulation loop. This circuit avoids the difficulty by using a low-cost fixed voltage regulator to supply the feedback circuit with a stable voltage. This arrangement greatly simplifies current measurement and regulation.
To generate this intermediate supply voltage we use an LM7815. Its output passes through R17, which measures the output current, to MOSFET T1 which is driven by the voltage regulation opamp IC1C. Here R11 and C4 determine the bandwidth of the control loop, preventing oscillation at high frequencies. R15 ensures that capacitive loads with low effective resistance do not make the control loop unstable. The negative feedback of AC components of thecurrent via R12 and C5 makes the circuit reliable even with a large capacitor at its output, and negative feedback of the DC component is via the low-pass filter formed by R14 and C6. This ensures that the voltage drop across R15 is correctly compensated for. C7 at the output provides a low impedance source for high-frequency loads, and R16 provides for the discharge of C17 when the set voltage is reduced with no load attached.


Source: http://powersupplycircuit.blogspot.com/

Stabilized Power Supply With Short Circuit Protection


Here is stabilised power supply with short circuit protection. It’s an efficient 4-stage stabilized power supply unit for testing electronic circuits; and it provides well regulated and stabilized output, which is essential for most electronic circuits to give proper results. The circuit provides an audio- visual indication if there is a short circuit in the PCB under test, so the power supply to the circuit ‘under test’ can be cut-off immediately to save the valuable components from damage.



The circuit provides four different regulated supply outputs (12V, 9V, 6V and 5V) and an unregulated 18V output, which are selectable through rotary switch S2. The selected output is indicated on the analogue voltmeter connected to the outputs rails.


Source: Authorized by D. Mohan Kumar, ELECTRONICS FOR YOU, July 2004

Low Dropout Adjustable Regulator by LM2941


We frequently acquire requests for voltage regulators for systems for which the accepted LM317 is not suitable. Although the LM317 can acquire ascribe voltages up to 3-40 Volts, and achievement adapted voltages from 1.2-37 Volts, it can alone achievement a reliable anchored voltage if the ascribe voltage is at atomic 2-3 Volts college than the called achievement voltage - e.g. to get a reliable 12.0V output, the ascribe voltage would charge to be 15V+. This voltage aberration is the dropout, the bulk of voltage alone (dissipated/wasted as heat) in the regulator.

Low Dropout Anchored Voltage Regulators
Where a anchored voltage regulator is required, article like the LM2940 ambit can be used. These are low dropout voltage regulators about accessible with anchored achievement voltages of 5, 10, 12, and 15 Volts.
Such a regulator is complete for use for archetype area 12V rated LED spotlights are to be powered with a 12V battery. The array voltage can ambit from 12.5 to 14+ Volts, and we charge a anchored 12.0V to ability the LEDs, so although an LM317 would not be reliable, the LM2940 (which will bead no added than 0.5 Volts) would accord a anchored 12.0V achievement beyond the abounding voltage ambit of the array reliably.
Unfortunatately we cannot use an LM2940 area a non-standard voltage - e.g. 8.50 Volts - is required. Ideally we appetite article with the adaptability of the LM317, but the low dropout characteristics of the LM2950. Fortunately such a basic exists and it is the LM2941 adjustable low bead out voltage regulator (which is pictured above).
The LM2941 can achievement voltages from 5.0 to 15.0 Volts * with a archetypal dropout voltage of aloof 0.5 Volts (@ 1 Amp, beneath for lower currents), and an complete best dropout of 1.0 Volts beyond the abounding temperature range. The LM2941 can accumulation up to 1 Amp of current.
* Note that the best ascribe voltage is 26 Volts, so this basic is not acceptable for 24 Volt rated systems.
Pictured aloft is the archetypal appliance ambit application the LM2941 as an adjustable voltage regulator. The advertence voltage (measured beyond ADJ and GND) is 1.275V. With the resistor R1 about set to 1K, the amount of R2 for any accustomed adapted achievement voltage is affected application the afterward equation:
R2 = R1 (( Vout / Vref) - 1 ))
For example, if an 8.00V low voltage bead out regulator is required, R1 = 1K, Vref = 1.275, and so R2 = 1000((8.00/1.275) - 1) = 5276 Ohms.
Turning the blueprint about we can additionally account the achievement voltage for any accustomed ethics of R1 and R2:
Vout = Vref * ((R1 + R2) / R1)
…so if we accumulate R1 as 1K and set R1 as 5K1 (since the 5276 Ohm amount affected is acutely not a accepted resistor) we see that Vout = 1.275 ((1000 + 5100) / 1000) = 7.78 Volts. (Note that it is accessible to affix accepted resistors in alternation abacus up their ethics to get an exact amount if a actual authentic voltage regulator is appropriate - e.g. 4K7 + 560R + 10R + 5R6 = 5276 Ohms for an 8.00V regulator)

High Current Regulated Supply By LM317 and 2N3055×2



transformer to supply power for the LM317 regulator so that the pass transistors can operate closer to saturation and improve efficiency. For good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors should be close to the output voltage.
High Current Regulated Supply By LM317 and 2N3055×2
The LM317 requires a couple extra volts on the input side, plus the emitter/base drop of the 3055s, plus whatever is lost across the (0.1 ohm) equalizing resistors (1volt at 10 amps), so a separate transformer and rectifier/filter circuit is used that is a few volts higher than the output voltage. The LM317 will provide over 1 amp of current to drive the bases of the pass transistors and assumming a gain of 10 the combination should deliver 15 amps or more.
 
By Bill Bowden
Source :: http://ourworld.compuserve.com/homepages/Bill_Bowden/page12.htm

5V 5A Higher currents by LM340-5 and 2N4398


If you want circuit to use a higher current regulator - up to 5A regulators are available. Please see here circuit,it good idea very much. In this circuit, the transistor Q1 is used to share some of the current supplied. The voltage regulator maintains the output voltage, and still operates short circuit protection.


5V 5A Higher currents  by LM340-5 and 2N4398
The current that the transistor takes is set by the resistor values R1 and R2, and is I = R2/R1 * RegulatorCurrent. The example shown converts a 1A regulator into a 5A (4A for the transistor plus 1A for the regulator) voltage regulator circuit. See the LM340 datasheet for a full description of this circuit.


http://www.circuitpowersupply.com/circuitblog/5v-5a-higher-currents-by-lm340-5-and-2n4398/

Power Supply Regulator Variable 3 - 24 Volt 3 Amp By LM1458 and 2N3055


This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks and the current sense resistor should be rated at 3 watts or more.

Power Supply Regulator Variable 3 - 24 Volt  3 Amp By LM1458 and 2N3055

Voltage regulation is controlled by 1/2 of a 1558 or 1458 op-amp. The 1458 may be substituted in the circuit below, but it is recommended the supply voltage to pin 8 be limited to 30 VDC, which can be accomplished by adding a 6.2 volt zener or 5.1 K resistor in series with pin 8. The maximum DC supply voltage for the 1458 and 1558 is 36 and 44 respectively. The power transformer should be capable of the desired current while maintaining an input voltage at least 4 volts higher than the desired output, but not exceeding the maximum supply voltage of the op-amp under minimal load conditions. The power transformer shown is a center tapped 25.2 volt AC / 2 amp unit that will provide regulated outputs of 24 volts at 0.7 amps, 15 volts at 2 amps, or 6 volts at 3 amps. The 3 amp output is obtained using the center tap of the transformer with the switch in the 18 volt position. All components should be available at Radio Shack with the exception of the
 
http://ourworld.compuserve.com/homepages/Bill_Bowden/

Easy DC Converter 12V to 24V


A friend of me wants the circuit enhances Voltage 12VDC from be 24VDC or DC to DC Converter 12V to 24V. By fix reveal that be the circuit is simple , build not difficult. I then advise this circuit try out think use just Transistors D1616 = 2 pcs. with transformer the small-sized , mix with other equipment a little only again. Follow a picture has can to use this circuit with small fan motor.
Easy DC Converter 12V to 24V


http://www.circuitpowersupply.com/circuitblog/easy-dc-converter-12v-to-24v/

Basic Step up voltage DC to DC converter by 74C14


When you want to experience build Step up voltage DC to DC converter. I thinks this circuit basically the base certainly. By use 74C14 integrated digital number circuits are pillar equipment. In the principle at the beginning can modify 1.5V DC electricity pressures have to 6V DC. With the techinque LC booster up voltage. For other detail , see in the circuit and original website
 
Basic Step up voltage DC to DC converter by 74C14

 
http://www.rowan.sensation.net.au/electronics/stepup.html better sir.

Power Filter Regulated for car by LM1084



When you lead to play MP3 or laptop computer come to apply to an automobile. Sometimes may born noise problem has from electricity automobile system. I thinks Power Filter Regulated for car by LM1084-12 may help solve a problem this get.

Power Filter Regulated for car  by LM1084

Because of using way LC filter and IC LM1084-12 (5A Low Dropout Positive Regulators) as a result can help regulate voltage well. If there is exceed noise 12V more although a little just will change this circuit has a little. And this circuit still can give the trend tall arrives at 5A can apply to the equipment cover very. The detail is other see from circuit picture and original website

 

 

http://linuxcar.sone.jp/reg.en.html

3V to 5V Dc converter by LT1073



If you have a place turns on the power 3V sizes, but want DC Voltage Regulator how are 5V. We sizes will make good. I has the exit, as a result build 3V to 5V Dc converter circuit. Which be not story difficult anything. if you use IC LT1073 of http://www.linear.com can count that be IC that good. You are supposed to keep to use very much. For Current output. as a result be valuable about 100mA enough be usable general get. When see the equipment adds that use. The a little there is important equipment be Diode D1 number 1N5818 and L1 = 68μH value. This circuit then for digital circuit. The small-sized request have fun it.
3V to 5V Dc converter by LT1073




http://www.circuitpowersupply.com/circuitblog/3v-to-5v-dc-converter-by-lt1073/

12V to 28V DC Converter By LM2585



Will do ? good! The exit is good. Be build DC to DC converter be 12VDC to 28VDC converter. By I uses the integrated circuit number LM2585 be pillar equipment for this work. Not difficult tell a lot of invite you see in circuit picture better.
12V to 28V DC Converter By LM2585

 

http://www.circuitpowersupply.com/circuitblog/12v-to-28v-dc-converter-by-lm2585/

1.5V to 5V DC Converter using LT1073



This is DC to DC Converter circuit. , It will change from DC Volt 1.5V boost up to 5V DC. It convenients for to are usable with digital circuit that use low current 100mA only. When see the detail in the circuit ,It the integrated circuit number LT1073 be main part. Then the circuit that build easy , good cheap. If you take an interest to try build this circuit can read the detail enhances from



 
http://www.linear.com or Will buy integrated number this circuit comes to try build see all right.

DC Power supply adjust voltage regulator 1.5 Volt - 15Volt 3Amp


I wants DC Power supply adjust voltage regulator 1.5 Volt - 15Volt, and give current about 3 Amp for in the work experiences all electronics. As seek many the circuit , meet that this circuit easily , use integrated number circuit LM1084 for control voltage model regulator adjustable voltage 1.5V - 15V. With fining decorates VR1. And should feedInput AC 18V 3A low like besides should hold let off the heat gives the integrated circuit LM1084 with. For the detail , see in the circuit.



 
http://www.circuitpowersupply.com/circuitblog/dc-power-supply-adjust-voltage-regulator-15-volt-15volt-3amp/

DC Power supply adjust voltage regulator circuit 1.5 Volt - 15Volt 3Amp



I wants DC Power supply adjust voltage regulator 1.5 Volt - 15Volt, and give current about 3 Amp for in the work experiences all electronics. As seek many the circuit , meet that this circuit easily , use integrated number circuit LM1084 for control voltage model regulator adjustable voltage 1.5V - 15V.


With fining decorates VR1. And should feedInput AC 18V 3A low like besides should hold let off the heat gives the integrated circuit LM1084 with. For the detail , see in the circuit.

http://www.circuitpowersupply.com/variable-voltage-regulator/0-30vdc-variable-voltage-regulator-lab-supply/

10A Variable Regulator power supply with LM350



This entry was posted on Wednesday, October 1st, 2008 at 8:08 am and is filed under High Current supply, dc voltage variable. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.

 

This be Variable Regulator power supply Circuit. That be High Current Source 10amp. By use the integrated circuit LM350. Which usual it controls Voltage output get 1.2V to 25V and give current about 3Amp. But when bring parallel 3 pcs. Can give current output be 10Amp max for this circuit. It can adjustable voltage output get 4.5V to 25V at 10Amp. Other detail please see in the website Link.

 

http://www.circuitpowersupply.com/circuitblog/10a-variable-regulator-power-supply-with-lm350/

dc-power-supply-6v-using-lm317


It uses integrated number circuit LM317T be important equipment. It can have the trend comes out about 1A by is character circuit DC voltage regulated. And have the circuit protects good. We can fix output voltage get from R1,R2. The diode D3-D4 (1N4002) use protect voltage flow turn back be bad with IC get. The Capacitors in the circuit helps Filter voltage smoothly and completed most. The transformer should choose 1A -2A size for current well sir.

 

http://www.circuitpowersupply.com/circuitblog/dc-power-supply-6v-using-lm317/