Secret Diagram

This inverter uses PWM (Pulse Width Modulator) with type IC SG3524. IC serves as a oscillator 50Hz, as a regulator of the desired output voltage. Input power ranging from 250W up to 5000W output and has. Following a series INVERTER 5000W with PWM (Pulse Width Modulator).

Here is a small and super inverter circuit project. This circuit can be used to power a small strobe or fluorescent lamp. It will generate over 400 VDC from a 12 VDC, 2.5 A power supply or an auto or marine battery. While size, weight, and efficiency are nothing to write home about - in fact, they are quite pitiful - all components are readily available (even from Radio Shack) and construction is very straightforward. No custom coils or transformers are required. If wired correctly, it will work.

Output depends on input voltage. Adjust for your application. With the component values given, it will generate over 400 V from a 12 V supply and charge a 200 uF capacitor to 300 V in under 5 seconds.

Super Inverter Circuit Diagram:



For your less intense applications, a fluorescent lamp can be powered directly from the secondary (without any other components). This works reasonably well with a F13-T5 or F15-T12 bulb (but don't expect super brightness). Q1 does get quite hot so use a good heat sink.

Notes:

• Construction can take any convenient form - perf board, minibox, etc. Make sure the output connections are well insulated.
• C1 must be nonpolarized type - not an electrolytic.
• D1 provides a return path for the base drive and prevents significant reverse voltage on the B-E junction. Any 1 A or greater silicon diode should be fine.
• C2 is shown as typical energy storage capacitor for strobe applications. Remove D2 and C2 for use with a fluorescent lamps.
• D2 should be a high speed (fast recovery) rectifier. However, for testing, a 1N4007 should work well enough. R2 limits surge current through D2.
• The polarity of the input with respect to the output leads is important. Select for maximum voltage by interchanging the black output wires.
• Mount Q1 (2N3055) on a heat sink if continuous operation is desired. It will get warm. Other NPN power transistors with Vceo > 80 V, Ic > 2 A, and Hfe > 15 should work. For a PNP type, reverse the the polarities of the power supply and D1, and interchange one set of leads (where a diode is used for DC output).
• Some experimentation with component values may improve performance for your application.
• When testing, use a variable power supply so you get a feel for how much output voltage is produced for each input voltage. Component values are not critical but behavior under varying input/output voltage and load conditions will be affected by R1 and C1 (and the gain of your particular transistor).

Here is an energy saving solar inverter battery charger. It harvests solar energy to replenish 12 volt inverter battery. It has auto cut off facility to stop charging when the battery attains full charge. The charger uses a 24 volt solar panel as input.

The circuit uses a variable voltage regulator IC LM 317 to set the output voltage steady around 16 volts. Variable resistor VR controls the output voltage. When the solar panel generates current, D1 forward biases and Regulator IC gets input current. Its output voltage depends on the setting of VR and the output current is controlled by R1. This current passes through D2 and R3. When the output voltage is above (as set by VR) 16 volts, zener diode ZD2 conducts and gives stable 15 volts for charging.  

Solar Inverter Battery Charger Circuit Diagram:


Charging current depends on R1 and R3. Around 250 to 300 mA current will be available for charging. Green LED indicates charging status. When the battery attains full voltage around 13 volts, Zener diode ZD1 conducts and T1 forward biases.

This drains the output current from the regulator IC through T1 and charging process stops. When the battery voltage reduces below 12 volts, ZD1 turns off and battery charging starts again.

Connect the circuit to the solar panel and measure the input voltage. Make sure that it is above 18 volts. Connect the circuit to the battery with correct polarity and adjust VR till LED lights. This indicates the conduction of ZD2 and output voltage. Use heat sinks for LM317 and TIP 122 to dissipate heat.

Note : The same circuit can be modified for charging different types of batteries. The only modification required is the change of ZD1 and ZD2. Select ZD2 value for the required output voltage and ZD1 for cut off voltage level. For example for 6 volt battery, ZD1 should be 6.1 volts and ZD2 6.8 volt. For Mobile battery, ZD1 should be 4.7 volts and ZD2 5.1 volts. All the other components remain same.


    

The series below is a simple inverter circuit that will change the voltage of 12v dc to 220v ac, with use drive transistor 32 as its tip.
Inverter circuit is very simple and easy to assemble and is perfect for just starting to learn to assemble electronic circuits, you can use the transformer 2A to produce about 20 watts output. Do not forget to install coolers in its transistors. good luck.

This is a simple Electronic Circuit Projects of  Inverter as high voltage low current source using by 555 timer IC. The circuit is capable of providing power for portable Geiger counters, dosimeter chargers, high resistance meters, etc.

Inverter as High Voltage Low Current Source Circuit Diagram:


The 555 timer IC is used in its multivibrator mode, the frequency adjusted to optimize the transformer characteristics. When the output of the IC is high, current flows through the limiting resistor, the primary coil to charge C3. When the output is low, the current is reversed With a suitable choice of frequency and C3, a good symmetric output is sustained.

In many circuits we need to generate an internal adjustable voltage. This circuit shows how it is possible to use a trusty old NE555 timer IC and a bit of external circuitry to create a voltage inverter and doubler. The input voltage to be doubled is fed in at connector K1. To generate the stepped-up output at connector K2 the timer IC drives a two-stage inverting charge pump circuit.

The NE555 is configured as an astable multivibrator and produces a rectangular wave at its output, with variable mark-space ratio and variable frequency. This results in timing capacitor C3 (see circuit diagram) being alternately charged and discharged; the voltage at pin 2 (THR) of the NE555 swings between one-third of the supply voltage and two-thirds of the supply voltage.

Voltage Inverter Circuit Using IC NE555

The output of the NE555 is connected to two voltage inverters. The first inverter comprises C1, C2, D1 and D2. These components convert the rectangular wave signal into a nega-tive DC level at the upper pin of K2. The second inverter, comprising C4, C5, D3 and D4, is also driven from the output of IC1, but uses the negative output voltage present on diode D3 as its reference potential. The consequence is that at the lower pin of output connector K2 we obtain a negative volt-age double that on the upper pin.


Now let us look at the voltage feedback arrangement, which lets us adjust this doubled negative output voltage down to the level we want. The NE555 has a control voltage input on pin 5 (CV). Normally the voltage level on this pin is maintained at two-thirds of the supply voltage by internal circuitry. The voltage provides a reference for one of the comparators inside the device. If the reference voltage on the CV pin is raised towards the supply voltage by an external circuit, the timing capacitor C3 in the astable multivibrator will take longer to charge and to discharge. As a result the frequency of the rectangle wave output from IC1 will fall, and its mark-space ratio will also fall.

The source for the CV reference voltage in this circuit is the base-emitter junction of PNP transistor T1. If the base volt-age of T1 is approximately 500 mV lower than its emitter voltage, T1 will start to conduct and thus pull the voltage on the CV pin towards the positive supply.

In the feedback path NPN transistor T2 has the function of a voltage level shifter, being wired in common-base configuration. The threshold is set by the resistance of the feedback chain comprising resistor R3 and potentiometer P1. When the emitter voltage of transistor T2 is more than approximately 500 mV lower than its base voltage it will start to conduct. Its collector then acts as a current sink. Potentiometer P1 can be used to adjust the sensitivity of the negative feedback circuit and hence the final output voltage level.Using T1 as a voltage reference means that the circuit will adjust itself to compensate not only for changes in load at K2, but also for changes in the input supply voltage. If K2 is disconnected from the load the desired output voltage will be maintained, with the oscillation frequency falling to around 150 Hz.

A particular feature of this circuit is the somewhat unconventional way that the NE555’s discharge pin (pin 7) is connected to its output (pin 3). To understand how this trick works we need to inspect the innards of the IC. Both pins are outputs, driven by internal transistors with bases both connected (via separate base resistors) to the emitter of a further transistor. The collectors of the output transistors are thus isolated from one another [1].

The external wiring connecting pins 3 and 7 together means that the two transistors are operating in parallel: this roughly doubles the current that can be switched to ground.The two oscilloscope traces show how the output voltage behaves under different circumstances. The left-hand figure shows the behaviour of the circuit with an input voltage of 9 V and a resistive load of 470 Ω connected to the lower pin of output connector K2. The figure on the right shows the situation with an input voltage of 10 V and a load of 1 kΩ on the lower pin of output connector K2. The pulse width and frequency of the rectangle wave at the output of IC1 are automatically adjusted to compensate for the differing conditions by the feedback mechanism built around T1 and T2.

Because of the voltage drops across the Darlington out-put stage in the IC (2.5 V maximum) and the four diodes (700 mV each) the circuit achieves an efficiency at full load (470 Ω between the output and ground) of approximately 50 %; at lower loads (1 kΩ) the efficiency is about 65 %.

This is the Simple 12 Vdc - 120 Vac Inverter Circuit Diagram. An Inverter is a device that converts 12 volts d.c to 120 volts a.c. , which is what we use in our homes.  This project will handle about 300 watts, which is perfect for lights, small T.V.'s and radio equipment.

This Inverter takes 12 volt d.c  and steps it up to 120 volt a.c.  The wattage depends on which transistors you use for Q1 and Q2, as well as the "Amp Rating" of the transformer you use for T1. This inverter can be constructed to supply anywhere from 1 to 1000 (1 KW) watts. If Q1, Q2 are 2N3055 NPN Transistors and T1 is a 15 A transformer, then the inverter will supply about 300 watts. Larger transformers and more powerful transistors can be substituted for T1, Q1 and Q2 for more power.

 Simple 12 Vdc - 120 Vac Inverter Circuit Diagram


Note: Don't try to run inductive loads (motors...) off this inverter.

Parts
  
C1, C2        68 uf, 25 V Tantalum Capacitor
R1, R2        10 Ohm, 5 Watt Resistor
R3, R4        180 Ohm, 1 Watt Resistor
D1, D2        HEP 154 Silicon Diode
Q1, Q2        2N3055 NPN Transistor (see "Notes")
T1        24V, Center Tapped Transformer
Misc.        Wire, Case, Receptacle (for output)
       Fuses, Heatsinks, etc.

Caution: This circuit can cause serious injury or death. Keep away from children.[link]

This electronic circuit project is very interesting  and low-cost electronic project,  some electronic circuits we need a 9 volts power supply, but we need to use a battery if that device is mobile. In many cases we don’t have a 9 volts battery or we don’t have enough space to put a 9 volts battery inside the device, so this case we can use a this inverter circuit that will convert 1.5v to 9v to take the place of those expensive 9v batteries.

1.5 to 9 Volts  Inverter  Circuit Diagram:


The input voltage for this inverter can be from 1.5 volts, up to 4.5 volts.  When no current is being drawn from the output the current is less than 10mA.

This inverter circuit is very simple requiring few components, but it can be used only for projects that require low current.  The L1 coil must have 60 turns on a 10 mm ferrite slug 15 mm long, using a 0.25 mm diameter enameled wire.

A simple inverter transformer used by loadable and allow (to increase efficiency ) change the frequency 50/60 Hz .

This simple drive can serve as a source of voltage 230V/50Hz for appliances to power by the transformer used , which can be compact fluorescent lamp with ballast choke DZ series and classic scooters , razors, power televisions and other consumer electronics , backup gas boilers during a power failure . and current clip . Are used both in the home and at the cottage, ala especially campers , boat and everywhere where there is no grid 230 . 

Simple Inverter 12/220 V  Circuit Diagram


The connection is very simple. As a 50Hz square wave generator is used monostable flip-flop 4047 working in astable mode. The outputs 10 and 11 are available in -phase output pulses , which are driven by four MOS switches involved in the bridge connecting alternately winding transformer 10V to 12V power supply . If the output 10 IO1 H level , the transistor T3 is switched conductivity N, while the output is 11 L level at which the transistor T2 is switched conductivity P.

 After flipping levels at outputs 10 and 11 are provided transistors undone and the transistors T1, T4. The presence of signals produced 230V glow . PR1 switch can change the frequency of the generator from 50Hz to 60 Hz . To power all these appliances is not necessary to use a crystal oscillator 50Hz . With the values ​​of components RC oscillator on pins 1 , 2 IO1 the accuracy and frequency stability about 2 %, which for all these applications is sufficient .

Increasing the frequency to 60Hz can be achieved by a significant reduction in the current drawn from the battery without a load connected - to a half . At this frequency also can be partially small increase speed of asynchronous motors . (Motorcycle without carbon.) The frequency 60Hz is possible to operate all of the above appliances and inverter achieves higher efficiency. Frequency of 60Hz is used in USA , Japan and many other countries.



Design - for PCB mount 2pcs first wire connection , the first located at POJ1 , one of IO2 . Pinholes transistors is necessary to ream bur A1mm to fuse strips A1.2mm , four holes for mounting transistors A3.2mm . These drill holes are accompanied by dural L cooler and side joints with traces holes to mount transistors. Traced These holes are also drilled A3.2mm .
The transistors are bent pins 90 °. Under the screw heads must stringing plastic insulating washers and over mica , which is suitable to coat on both sides with silicone grease to improve thermal conductivity , the transistors screwed to the heat sink and plate as shown. Strengths of the PCB Can going through here , despite the current 4A. The integrated circuit is in the slot. Fifth, the transformer terminals to board pieces Lanka . On pins 9-10 transformers use wire and at least 1 mm. Power drive parameters can be easily increased in exchange for a larger transformer , which has a transfer 230V/10-12V .

No problems were tested transformer with an output of 200W . Unwinding the secondary winding of 12V to 10V achieved performance of about 160W . Even better performance , higher efficiency and lower no-load current consumption can be achieved with toroidal transformers . At higher outputs must be left to the radiator bolted effective cooling fins , with 40W transformer contained in the kit is L cooler at full load temperature of about 40C ° . The drive gives the open circuit voltage of about 260V , which is not necessary to worry about. The connected load voltage is reduced to the optimum .

I have enabled grid voltage fluctuation tolerance + / -10 %, which is from 207V to 253V . The drive is suitable for security build in a plastic box . It should be noted that the transformer , fuse , doutnavce and the output terminal voltage is dangerous .


Achieved characteristics :

Transformer 40W included in the kit:
Open circuit voltage of 260V
current consumption of 400 mA
voltage across the lamp 25W 230V
consumption at 25W load 2.5 A
voltage across the lamp 40W 220V
consumption under load 40W 3,8 A

Other transformer with an output of 100W/230V/10V
Open circuit voltage of 270V
current consumption of 800 mA
voltage across the lamp 40W 225V
consumption under load 40W 3,6 A
voltage across the lamp 60W 210V

consumption under load 60W 4,8 A

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