Free Electronic Circuit Schematics » Switching regulator circuit

Car Voltage Stabilizer Circuit

admin — Wed, 14 Dec 2011 00:08:26 +0000

Volt Stabilizer

Welcome back to Free Circuit Dot com, I used to built the Voltage stabilizer for my car,I think ,this is a good circuit to improve your car with simple circuit.

Equipment
1. Cap 10,000 uf 25 v = 2 option.
2. Cap 4,700 uf 25 v = 2 option.
3. Cap 2,200 uf 25 v = 2 option.
4. Cap 1,000 uf 25 v = 2 option.
5. Cap 470 uf 25 v = 2 option.
6. Cap 0.1 uf 25 v = 2 option.
7. Prignss sheet 1 sheet.
8. Fuses, lamp bulbs 10 A = 1.
9. Carton boxes, plastic or aluminum. The power amp looks like a box (aluminum heat sink better).
10. LEVER 2.
11. The battery memory size 8 ~ 10 mm. = 1 meter, it’s my own little (if it has good contrast but do not forget to take the battery memory).
12. Sleeve shrink a line (the fish tail strap with battery memory. To be completed).
. 13 = 1 red LED light bulbs.
14. R = 100 Ohm was an option (the next leg of the LED).

Car Voltage Stabilizer Assembly

1000 VA DC-DC Converter Circuit at 75V/105V

admin — Sun, 03 Apr 2011 08:58:25 +0000

Converter 1000 VA 75-105 Volts Circuit

Welcome back to Free circuit dot com,We will be continue to present the converter circuit for amplifier use Car power supply.

Regarding you say practical, Converter 1000Watts at 75V-105V. is too much to ask. You should at least try to 24V. Take a look at this (1250VA, 24V):
It is used to ensure the MOSFET is turned off completely safe from being used to load the internal diodes, so no short circuit.

The converter I wrote, I have tried this transistor and immediately blew the MOSFET. When I wrote this transistor, is all right. The MOSFET output stage,For the diodes and transistors,

Converter 1000VA at 75V-105V PCB

this arrangement in the majority of converters used in Bangladesh and India, as I have seen.

How to Calculate transformer

Vin = Vout (sec / pri) at a frequency of 50kHz.

Voltage to 70 V at voltage Battary 13.8V.
70 = 13.8 (sec / pri).

Thousands of Primary 6, I was around 6 ct 6.

Representation 70 = 13.8 (sec / 6).

Find the coil secondary = primary (Vout / Vin).

= 6 x (70/13.8).

= 31 Turn.
Therefore, 31 cycles were 70V.

If you want to reduce or increase Voltage ,you sould be reduce or increase the frequency of this circuit can be reduced switcing pressure.
If the frequency is too low to heat the Mosfet and fig Coli if high frequency noise than it is to offline Power Amp.

12V to 70V DC/DC Converters Circuit with 1400W

admin — Fri, 01 Apr 2011 10:07:13 +0000

Converter 12v to70V 14000w circuit

Free Circuit dot com Today!,After I had posted many amplifier circuit but not post power supply or switching . So,I have one the DC / DC converter 1400W circuit A combination of modern DC / DC switching power supplies, conversion technology.
A constant voltage and current control circuit implementation of the correction of output voltage variations due to transient variations in input voltage or load in less than 1.5 ms caused. This allows a constant stream of continuous short circuit.

DC / DC converter circuit this simple DC-DC converter up to 70V on a 24V source. It can be used for amplifier,radios, sign lights, relays, horns and other accessories in 24V 12V vehicle with a maximum of about 800 mA. to run.

Converter 12v to70V 14000w PCB

It can be used for a 12V battery of another tax or increasing the voltage just enough to make the necessary efforts to provide a 12V linear regulator. With an operational amplifier as the oscillator to a square coil and other operational amplifier in a ring feedback loop, it will not proceed under varying loads to a stable 24V source for many applications. With a wide output adjustment of this circuit is very versatile.

So,I have assembly picture also thus as below .

Converter 12v to70V 14000w Assembly

Note

Vin = Vout (sec / pri) at a frequency of 50kHz.

Voltage to 70 V voltage Battary 13.8V.
70 = 13.8 (sec / pri).

Thousands of Primary 6, I was around 6 ct 6.

Representation 70 = 13.8 (sec / 6).

Find the coil secondary = primary (Vout / Vin).

= 6 x (70/13.8).

= 31 Turn.
Therefore, 31 cycles were 70V.

If you want to reduce or increase Voltage ,you sould be reduce or increase the frequency of this circuit can be reduced switching pressure.
If the frequency is too low to heat the Mosfet and Coli if high frequency noise than it is to offline Power Amp.

Power Supply 0 to 30V 2A variable with IC MC1466L Circuit

admin — Tue, 02 Nov 2010 03:53:18 +0000

Power supply 0 to 30 V at 2 A circuit

SPECIFICATION
Output voltage (Vout) 0 ….. 30V DC
Output current (Iout) 0 ….. 2A DC
Consolidation Load 0.008% (Dion = 1.5a)
Stabilization Network 0.01% (DIi = 20V)
Stability of Vo (Vo = 15V, Io = 1A) 0.2% (DI = 15? C, Dt = 90min)
Ripple and noise of 1mV pp (20HZ. .. 10MHZ)
Output impedance (Vo = 10V, Io = 1A) 20mO at 1KHZ, 250m at 200KHZ
operating temperature (ambient) 0-40 ° C

The basic requirements of a laboratory power supply, is to provide the voltages and currents of operation required by conventional devices have low output impedance, low noise, low ripple and good stabilization. The above requirements are met, the circuit’s power supply.

Many power supplies have an electronic security protects them from destruction when the output is shorted. The circuit can be configured to use the higher power output at any one value from 0 to 2A and not to exceed, even if the load is greater demand. This not only protects, but also can prevent and device supplies, though the latter tends to draw more power than projected.

The power supply circuit can be used even for testing components, the profiling voltage / current and used as an ideal source of constant voltage, current, sufficient to provide 0-30V and 0-2A, continuously adjustable, rather than in steps. For the power circuit, the transformer T1 has two secondary windings. A winding supplying the output circuit with high current through D1-4, C2, and the second coil, which feeds the IC1, as rectified by D1, C4 and stabilized by the D7, C5. The current passes through LED D6, which serves as an indicator.

The C7 offset frequency do within circuit IC1 and R2/D8/D9, to protect against voltage spikes of the network. Me pontesometer R3, regulate the output voltage at the point where we want. By pontesometer R8, adjust the threshold current, we want to exit. At the exit of the feeder is a multi Darlington, consisting of Q1, Q2 and Q3, Q4, connected in parallel. The resistors R14, R15 ensure uniformity of the collector currents, the R10 to R12 improve the stability DC output, which is essential especially at high temperatures, the reverse currents begin to become appreciable. The netting R9, C10, C11 achieves frequency offset in the amplifier output of IC1 and the D13, its protection. Through the R19 passes the output current. The voltage drop occurring at the ends of degraded at a rate and applies to entry 11 of IC1.

In the second entry 10 of IC1 is applied a constant voltage, the price of which is regulated by the R8, the desired maximum current output. Once the output exceeds this value, the voltage drop at R19, 10 is applied to the input of IC1, thereby activating the differential amplifier in IC1 and prohibit the further increase in power output. The capacitors C13, C14, C15 disconnection make the exit, while the D15 to protect against reverse voltages.

With this instrument, VA1, we can measure both the voltage and current output, where the position is located switch S2. The position is shown in the circuit, the switch measures the current by sampling the voltage drop onto the R19, by means of R17, R18. To measure the output voltage should move the switch to another location by sampling the output voltage. Fine adjustment is made by R21, R22.

The transistor Q2, should be placed in a small refrigerator, and Q3, Q4, a heatsink with thermal resistance of 2.6 ° C / W, and well insulated. The arrangement of the feeder can be easily done by using a multimeter, which will connect the output of the feeder. Moving and adjusting the trimmer in conjunction with the main potesometer regulating voltage and current, you can limit the scale will affect the R3, R8. H.N 6-7/77

Electronic Part List

R1= 1.2Kohm 1W
R2-12= 100ohm
R3= 47Kohm Lin.
R4-7-21= 10Kohm trimmer
R5= 8.2Kohm
R6-10= 12Kohm
R8= 470ohm Lin.
R9= 1.2Kohm
R11= 820ohm
R13= 560ohm
R14-15= 0.68ohm 2W
R16= 330ohm
R17= 470ohm
R18= 470ohm trimmer
R19= 0.22ohm 2W
R22= 56Kohm
R20= 3.9Kohm
C1-3= 330nF 250V D8= IN5236B
C2= 4700uF 63V D9….14= 1N4002
C4= 68uF 63V
C5= 47uF 40V
C7-12= 100nF 100V Lin.
C8= 680nF 100V
C9-14= 1uF 40V
C11= 10pF ceramic
C13= 220uF 40V 2W
F2= 2A slow Fuse
S1= 2XON/OFF 10A/250V switch
D1-4= 15A Bridge trimmer polyester
D5= 1N4002 VA1= 500?A polyester
C10= 220pF ceramic
S2= 2X2 ON 1A
F1= 1A/250V slow Fuse
T1=220VAC/ A:34V/4A B:36V/50mA
C6-15= 10nF 100V polyester
D15= MR501
Q1= MPSL01
Q2= 2N4923
Q3-4= 2N3055
IC1= MC1466L Motorola
D6= LED 5mm RED
D7= 1N5252B

5Volt Output Switching Regulator Citcuit with LM2575

admin — Mon, 31 May 2010 02:18:48 +0000

5V switching circuit

Circuit is derived from an application note LM2575.

LM2575

Application by a notice ON SEMICONDUCTOR shows how the chip will be used to generate negative voltage positive voltage.

A power transistor, which is a drop of 4 volts across it and 3 amps through it can dissipate about 12 watts of heat, some regulatory problem. While her a saturated MOSFET transistor or a V and 3 amps through the will of only 3 watts. But then fully concentrate on transistor or MOSFET can be controlled or regulated, we have a very fast turn off and so the correct amount of current or voltage is provided.

More about switching power

Finished happens is PWM – Pulse width modulation. In this or MOSFET transistor, said ON-OFF started at 100 kHz, the duration is varied to control the output. Longer period of time “transfer of power, more or punch. Switching losses will be present, depending on how fast the growth and fall times of pulses.

Pulsed DC or AC can be chopped with a smoothed average of inductors and capacitors. Reactive pulsed inductor is absorbed by a 1N5817 Schottky Rectifier – 20V, 1A fast switching diode with low loss switching.

12Vdc 3A Adjustable Regulator Power supply circuit with LM317

admin — Sun, 28 Feb 2010 11:38:49 +0000

regulator 12V 3A circuit

The LM317 is to provide an adjustable, positive 3-Terminal Voltage Regulator 100mA (RA87U control) or 1.5 A (Order Code UF27E and N61CA) over a range of output voltage of 1.2V to 37V. These voltage regulators are exceptionally easy to use and requires only 2 reistors external output set. Both line and load regulation are better established than standard regulators. Protection against overload is fully furnished with on-chip current limiting, thermal protection and safe area. This will remain fully functional even if the adjustment terminal is disconnected, making it virtually blow-out. Order UF27E comes in a TO-220-bag style. Order RA87U comes in a TO-92-style bag. Order N61CA comes in a TO-263-bag style.

10A Regulator Power Supply with IC78XX

admin — Sun, 31 Jan 2010 14:45:04 +0000

10A power supply

If you don’t know ,”How to build regulator circuit ” for your project or equipment, I think this simply circuit will be to apply in your project .

I leads the old equipment to come and give a very generous and say I pray for DC power supply circuit 10A.

What a simple please, when I saw the equipment they already have. Then take this route, please use the 78xx chips such as IC 7805 =output 5 Vdc.

IC 7809 =output 9 Vdc.

IC 7810 =output 10Vdc.

IC 7812=output 12 Vdc.

Many have the number and strength M15004 number of transistors that can increase the flow. Obtaining high range 10A.The important aspect Transfermer that you need about the current 10A. And using C-format 10000UF with Filter.

14Vdc at 2Watt Switching Power Supply Circuit

admin — Sat, 24 Oct 2009 04:51:50 +0000

The work of the power supply is the gain of 2N3053 2N3906 and 2N3904 is fixed internally at 2Watts.

2W switch power supply circuit

It is to compensate the reduction of output power due to low voltage supply the transistor uses the Bridge-Tied-Load principle (BTL) which can provide an output of around 1.5 to 2 W at 14Vdc with a power supply of 6 V.

For the circuit the potentiometer can be used to control the voltage. Capacitor C1 and C2 are meant for filtering the supply voltage if a battery eliminator is used as supply source. For operations using a battery C1 and C2 are no necessary.

The work of the power supply is the gain of 2N3053 2N3906 and 2N3904 is fixed internally at 2Watts.
It is to compensate the reduction of output power due to low voltage supply the transistor uses the Bridge-Tied-Load principle (BTL) which can provide an output of around 1.5 to 2 W at 14Vdc with a power supply of 6 V.

Figure 1 gives a stripboard layout for the 6V regulated power supply shown in figure 1.
The layout does not include the transformer block, so the input to the board needs to be 6V AC from a suitable transformer.
The layout includes space for two optional 2-way screw terminal blocks to make connecting up the power supply easier.

If the input voltage is 6V AC, you will be able to draw 1A from the power supply. For the maximum input voltage of 14V you will be able to draw 2W.

Adjustable regulator power supply circuit with LM317

admin — Sun, 04 Oct 2009 03:03:56 +0000

LM317 Variable Power Supply Regulator

A circuit is timeless. LM317 regulator is a versatile and highly efficient 1.2-37V voltage can provide up to 1.5 Amps. of current with a large heat sink.

It is ideal for almost any application. This was my first power source workbench and I still use it.

Since LM317 is protected against short circuit, fuse is not necessary. With the decline automatic temperature control, will be shut down if overheating. However, a very powerful (and cheap!) Package contrary.

The LM317, even if it is able to supply up to 37V, the circuit shown here is limited to 25V for safety and simplicity. Any output voltage requires additional components and a heat sink more.

Oh! Sure that the input voltage was at least a couple of times as the desired output. It’s agree to use a trimmer if you’re building a fixed power supply voltage.

Issue:

Follow all safety precautions when working with mains voltage. Insulate all connections on the transformer.

Possible applications:

The desktop power variable, fixed line voltage almost all possible applications, when more than 1.5 is required.

12 Vdc Dual Power Supply circuit with IC 7812&7912

admin — Mon, 31 Aug 2009 17:04:30 +0000

: dual regulator power supply circuit

Voltage Regulators low power consumption IC 78W series used in our instrumentation is now so cheap they are an economical alternative to simple regulators NPN-stabilizers. In addition, they offer the benefits of better regulation, current limiting / short circuit protection to 1000 mA shunt and heat down if the electricity disperses too. Indeed, is not the only way for these drives can be damaged polarity is incorrect or excessive input voltage. Regulators Series 78W to kind of stay 8V input voltage of about 35V, while the type 24v withstand 40V. Of course, of course, that regulators will not work with such an important input differential output as it would lead to excessive power is dispersed. All controllers will deliver the 78W series 1000mA current maximum expected input differential voltage output of less than 7V. Otherwise, too diffuse power, thereby bringing the fire extinguished.
Two transformers were used to step voltage 230-250V AC input power. It manufactures power transformers 6-0-6V secondary terminals. This output is fed into the rectifier and filter capacitor. Filtered IC6 that served 3-pin voltage regulator that provides a regulated output + 5V. It is used to enable the DPM system. It also comes as the network voltage source temperature accuracy.

Other manufactures transformers with a capacity of 12-0-12V at its secondary terminals. The center was established as a fountain in the previous case. The other two secondary terminals are fed bridge rectifier constructed using diodes. Output recovered is filtered using a capacitor C5 and C6 for food and IC7 IC. In-8 IC7, which are 3-pin regulators provide output voltage of ± 8V. These two voltages are signal generator. TO-8V power source is applied to the temperature of the network, and the reference voltage. It is also necessary to +12 V and-12V supplies for the implementation of operational amplifiers. This can be easily done using a 12V zener diodes. The output of bridge rectifier is attached to the +12 V and-12V, respectively, using two zener diodes. In the zener output is fed to the terminals of the operational amplifier supply. For supply
for operational amplifiers must not be very effective in regulating + 12V, the use of Zener diodes be costly.
For the testing of electronic components voltage above 50 V is required. This can be achieved through quadruple the chain tension. It consists of four diodes and four electrolytic capacitors. Unreasonable Administration Secondary 12-0-12V is connected to quadruple string. Quadrupled output of the circuit is 68V to ground.

Adjustable switching regulator circuit with LM317

admin — Fri, 24 Jul 2009 09:57:31 +0000

IC LM317 adjustable 3-terminal positive voltage regulator is able, the services of a current of 1.5 A on voltage 1.2 Vdc to 37 Vdc benefits. It is extremely easy to use and needs only two external resistors, the output voltage. Moreover, both the line and load regulation are better as a standard of regulation. Similarly, the LM317 is packaged in a standard transistor package, the easy and processed.

switching regulator with LM317 circuit

In addition to the price increase as regulatory authorities, protection against overloads only offers LM317 integrated circuits.

On the chip are the limits, thermal protection against overload for the protection and security. All protection circuits against overloads remains fully operational even if the terminal is adaptation.

Piture below show is output voltage formula for your adjustable and LM317 pinout

LM317 pinout and formula

Detials circuit
I have the voltage regulator, two of my mobile phone cigarette lighter circuit. He has a lot of others, and the voltage can easily be adapted by using a potentiometer. The LM317T is a tension, and should reach about 14 volts without problems. There can be up to 1 ampere, but you need a heat sink on the voltage.