1000 Watt Power Inverter Schematic

This 1000 watt power inverter circuit diagram based on MOSFET RF50N06.If you want more power then  add additional  MOSFET paralleled at RF50N06.This MOSFETS are  60 Volts and 50 Amps as rated.  It is necessary to connect  a  FUSE with the power line and always a LOAD have to connected while power is being  applied . The output power of this inverter is up-to 1k watt , it depends on output power transformer . You can use your custom transformer with experimenting for best result.

1000 watt power inverter Circuit Diagram:

1000 watt power inverter Circuit Diagram

How to parallel MOSFETs-1000 watt power inverter



12 Volts Voltage Regulator Car Adapter

A simple 12 volts voltage regulator car adapter circuit can be used to power your electronic devices from your car can be designed using few common electronic components.

12 Volts Voltage Regulator Car Adapter Circuit Diagram:

12 Volts Voltage Regulator Car Adapter Circuit Diagram

This 12 volts voltage regulator car adapter circuit use a 12.7 volts zener diode but maybe you can’t find a 12,7 volts zener , so in that case you can use a 12 v or 13 volts zener diode . If you will use a 12 volts zener you will need to stick in another diode like 1N4001 (in this case the output voltage will be a little under 12 ) and if you will use a 13 volts zener the output voltage will be around 12.3 volts.

Octopus Curve Tracer

This project involves the construction of a low-cost curve tracer that is suitable for testing a wide variety of electronic components both in-circuit and out of circuit. It is easy to construct and extremely useful for finding defective parts, especially semiconductors, in electronic devices.

The octopus is used in conjuction with an oscilloscope set to display in X-Y mode. It displays voltage across the test probes on one axis and current through the probes on the other axis. A scope with both Horizontal and Vertical inputs (X-Y mode) is required.

This is my version of a circuit that has been around since at least the 1960s, I added the ability to select voltage taps on the filament transformer and adjust the amount of current through the probes.

Octopus Curve Tracer Circuit Diagram:

Octopus Curve Tracer


Power is applied to the step-down transformer through a 1 amp fuse and a power switch. The transformer has output taps at 4V, 8V, 12V and 16V. If you can't find an equivalent transformer, a more common 6V/12V transformer will work. The voltage select switch allows one of four voltages to be selected. The current limit variable resistor selects the maximum current through the test probes.

When the probes are open, the scope will display a vertical line, when the scope probes are shorted, the scope will display a horizontal line. The octopus places a constantly changing sine wave voltage across the probed device. The horizontal axis shows the current through the probes and the vertical axis shows the voltage across the probes. As the sine wave changes, the scope trace loops around in accordance with the associated current and voltage readings from the probe. Probing different electronic components will produce a variety of unique scope patterns.


The octopus was built into a deep 4"x4" electrical utility box, as shown in the photo. A tall lid was used for the top to make enough room for the transformer. The box knock-outs on the front were removed and the switches and potentiometer were mounted on an aluminum plate that was screwed into the side of the utility box.

The test jack holes were drilled directly into the box and the power and oscilloscope cables were secured to the box with common Romex cable clamps. The oscilloscope cables were made with flexible RG-58 coax pieces and terminated with BNC connectors for direct connection to the scope.


Connect the Horizontal and Vertical connectors to the oscilloscope inputs, power up the octopus and adjust the scope's vertical and horizontal amplifiers for full screen-width lines when the probes are open and shorted.

Place various components across the scope and adjust the voltage taps and current limiter for the best display. The 12V setting is a good default value.

Here are some typical curves that the octopus will display:

  • Open Circuit - vertical line
  • Short Circuit - horizontal line
  • Resistor - diagonal line, slope varies with the value
  • Capacitors and Inductors - ellipses, shape varies with value
  • Diodes - L shaped curve
  • Zener Diodes - squared Z shaped curve
  • Transistor EC - tall L shaped curve
  • Transistor EB - squared Z shaped curve
  • Transistor BC - L shaped curve (same as diode)
  • Varistor - S shaped curve

The octopus is especially good at finding defective semiconductor devices. Power transistors often short out when they fail. The octopus can quickly find shorted parts, even in circuit. Leaky transistors and diodes will have curves with rounded corners instead of right angles. Keep in mind that antique germanium transistors tend to show as leaky, even when they are perfectly good devices.

By placing the probes on a transistor's emitter and collector leads, then touching the base lead with your finger, you can observe the device's gain by seeing how much the curve changes.

In-circuit testing with the octopus is a bit of an acquired skill, a wide variety of curves can be found and faulty components can be identified. If suspicious components are found, they can be removed from the circuit and tested further. Link

Micro Inverter circuit DC voltage AC 12v x110v

This is a micro-inverter DC voltage to AC from a 12v battery can generate a voltage of 110 or 220 volts AC and a frequency of 50Hz to 60Hz.

Micro Inverter circuit DC voltage AC 12v x110v Circuit Diagram:

Inverter Circuit Diagram

The circuit is very simple and does not need a printed circuit board, It is composed of two transistors oscillators that generate the square wave pulse to the transformer in the case is 10 +10 and its output 220V or 110V. This circuit is 50Hz, but can be changed by changing the value of RC .

Circuit Diagram

This circuit has the power transistor and that depends on the transformer.

source by: w3circuits

Low-cost and HiFi Expandor

This is the schematic design of HiFi Expandor Circuit with De-emphasis. The circuit is based NE570. The NE570 can be used to construct a high performance compandor suitable for use with music. This type of system can be used for noise reduction in tape recorders, transmission systems, bucket brigade delay lines, and digital audio systems. The circuits to be described contain features which improve performance, but are not required for all applications.

HiFi Expandor Circuit Diagram:
Expandor Circuit Diagram

The expandor to complement the compressor is shown in the above circuit. Here an external op amp is used for high slew rate. Both the compressor and expandor have unity gain levels of 0dB. Trim networks are shown for distortion (THD) and DC shift. The distortion trim should be done first, with an input of 0dB at 10kHz. The DC shift should be adjusted for minimum envelope bounce with tone bursts. When applied to consumer tape recorders, the subjective performance of this system is excellent.

250W Inverter using 555 timer IC1

Here is a simple circuit diagram of 250w inverter. A 555 timer (IC1) generates a 120-Hz signal that is fed to a CD4013BE flip-flop (ICl-a), which divides the input frequency by two to generate a 60-Hz clocking frequency for the FET array (Ql through Q6). Transformer Tl is a 12-/24-V center-tapped 60-Hz transformer of suitable size.

 250W Inverter Circuit Diagram:

Inverter Circuit Diagram