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Some guys have asked me how to fix a plug.Here I have mentioned how to fix a plug.Some times we can see some plugs without a fuse also.And the other thing is some countries use some what different colored wires. Note:  # If you are an underage be careful when you work with AC.So always get the assistance from an elder

so-many people ask  L.E.D which can light up with 6 V.So this is the circuit.This circuit is very simple circuit diagram by changing the value of resister you can get different power.

When we ride bicycles.Some times we have to face some troubles at night.Specially when we ride mountain  we can't get sufficient light  though we have a dynamo because when we ride a mountain speed of the bicycle  will reduce so that speed will not enough to give sufficient light.So I suppose this would be the answer for that.This circuit is operated with 9V and it will give a good light though the dynamo doesn't give the power.

Most of people like to think about wireless power.Yes now it has become a reality.So here I'm going to give you a wireless power circuit diagram.In this circuit We convert Dc to Ac then we have the ability to send power from one coil to another.This circuit can be operated with 6V. For this circuit I have used 1meter Circuit  wires to send power and receive power.  By changing the lenth of the wire and the Gage you can increase the sensibility of this circuit. Note:          # Build this circuit On a P.C.B          # When you make this circuit be careful because it generates high frequency voltage          # You have to take some efforts to get the result of this circuit

Most of you requested  circuit diagrams to operate Ac circuits via the signals of Dc circuit diagrams .So Today I'm going to show you how to how to operate Ac unites via Dc signals .In this work Most common way is using a Relay,Here I have used 5V relay you  can chose your relay according to the voltage of your Dc circuit. If you want you can add a Fuse for the load.Through this method you can control various types of light circuit diagrams.By using this circuit diagram you can control 12V unites too.that means you can give 12V power instead of 230V and as a load you can use 12V unit. Note: # Build this circuit on a P.C.B # If you are a child Don't try to build this circuit diagram because 230V is dangerous

This issue has now been solved. Scroll to the bottom for the update. I started working on a pure sine wave inverter based on the PIC32MX250F128B. The first stage was to just get the SPWM working and test that before proceeding to add the power stage, feedback and other control, etc. This led me to some interesting observations regarding the PIC32MX250F128B interrupts, especially the use of the shadow register set and a related problem. I set up Timer 2 to be the time base for sine wave generation (DDS/SPWM) using OC1. In the Timer 2 interrupt, the duty cycle update request is performed (OC1RS is updated). Timer 2 interrupt priority was set to 7. This all worked fine. The initial ISR definition was: void __ISR(_TIMER_2_VECTOR, ipl7) T2int(void) { ..... } However, when I used the ADC (input from potentiometer for amplitude control - a start at implementing feedback), accessing any of the ADC registers in the while (1) loop in main stopped the PIC32 from working.  I then added ...

I had long been thinking of designing a simple AC voltmeter but had somehow never gotten to it. However, with school just ending, and me going back to electronics, this was a neat simple yet useful circuit that I felt I could just get done with in a day or two. The concept is fairly straight forward. Since I needed this only to measure the mains AC voltage and the output voltage of the sine wave inverter I was working on (based on the PIC32MX250F128B - more on this later), I didn't need to do any "true RMS" measurement. All I had to do was to convert the mains AC to DC, filter it and measure the peak voltage. Of course this had to be scaled down to a safe range for the microcontroller. The RMS voltage for a sine wave is equal to 0.707 (to 3 decimal places) the peak voltage. The design was based on the Microchip PIC16F676. However I realized that I didn't have any in stock with me. So, I just used the pin-compatible PIC16F684. On the software side of thin...

I think most of people like to make radio circuits.Because most of them like to listen radio programs from the radio which they made by their own hands.You all know Free circuit Diagrams 4U is a website which is giving simple circuit diagrams.So that most of beginners can start their electronic life simply.So today I'm going to give you a very simple circuit diagram.Here we have used common electronic parts.this circuit can be operated with 3V power supply Note: # Build this on a pcb # Build this circuit in a small area # Don't supply over 3V

Most of you guys send  emails to Free circuit diagrams 4u asking Fm transmitters so today we are going to give you a simple transmitter circuit diagram.The special thing of this circuit is we can use this circuit with 9V power supply and We have used a common transistor 2N3904 for this circuit.You can send signals up to 100-150M.you can use this as a spy circuit. Note:   # Build this circuit on a pcb   # Don't supply over 9V  # This is only for educational purpose, We don't get any responsibility of misusing this circuit