Simple Bug Circuit Diagram

Today I'm going to give you a simple bug circuit diagram.By using this circuit you can send your FM signals up to 30-50 M. Here the coil is tapped at the 6th loop.We have used common transistor 2N2222. And also this circuit can be operated with 3V power supply.When you build this circuit build this circuit in a small space.Antenna should be 1 feet to 3 feet.With this circuit you will be able to transmit FM signals between  90Mhz to 180 Mhz.

Note: 

         # To get maximum advantage build this on a PCB

         #  Don't exceed 3V

Simple Fm transmitter circuit Diagram

Today I'm going to give you a FM transmitter circuit.The most impotent thing of this circuit is we can operate this circuit with 1.5V power supply.L1 should be 5 turns of 0.7mm enameled wire wound on 3mm form.Here we have used  2SC9018 transistor.Fix 12 inch antenna .with this circuit we could transmit radio signals up to 

30 m.

Note :  #  This is only for educational purpose 

           #  Build this circuit on a PCB   

Simple AM Transmitter Circuit Diagram

Today we are going to give you a  simple AM transmitter circuit diagram.At the moment FREE CIRCUIT DIAGRAMS 4U has given you may transmitter circuit diagrams .Before every thing I must say that FREE CIRCUIT DIAGRAMS 4U give you these circuits to expand your knowledge not for make troubles for others.I must say that If some one misused this circuit diagram FREE CIRCUIT DIAGRAMS 4U  doesn't take any responsibility of that.Here we have used two transistors 2N2904A and  2N3053. You can operate this circuit diagram with 12V.For this transmitter you have to make some what long antenna.

Note : Build this circuit on a PCB
          Antenna should be 20 to 30 feet

Vedio transmitter

Hi everyone today I'm going to give you a Vedio transmitter circuit diagram.As the transistor we have used  transistor 2N2222 And I must say this.this circuit is not a tested one this circuit was given by one of my friends you test this circuit and tell me the experience The transistors which can be used  are   BC108, BC546, BC337 or  2N2222.This circuit is operated with 6V.

Note: This is a VHF Transmitter
           Don't supply over 6V   

Simple MW Transmitter Circuit Diagram

Today I'm going to give you a simple MW Transmitter.This transmitter can be operated with 9 v power supply.Here we have used common transistor BF494B.Here we have used MW antenna coil

you can use the 8 ohm speaker to speak that means here the speaker does the work of the mic.To get the maximum result build this on a pcb and don't supply power without connecting the antenna.  



         

Note:  Don't missuse this circuit
           you can send signals up to 500M

Powerful FM Transmitter Circuit Diagram

Today we are going to give you very interesting circuit diagram.Normally most of electronic lovers love to make transmitter circuit diagrams.Already FREE CIRCUIT DIAGRAMS 4U has given you many transmitters.The specialty of this circuit diagram is this is some what powerful.By using this transmitter you can send signals up to 5ooM.here we have used very famous transmitter 2N2219 .This circuit is operated by 12v power supply.Specially I would like to tell you If your country doesn't allow you to build transmitters don't try this.We have publish this with the educational purpose.If you misused this circuit FREE CIRCUIT DIAGRAMS 4U doesn't take any responsibility of that.

Note:

# Build this circuit on aPCB

# Without connecting the antenna don't supply power for the circuit

# By using some what long wire as the antenna you can send signals to long distance

Wireless Power Transmitter Circuit Diagram

At present we can see people use wireless transmission now it has become a very famous electronic device  so today Free Circuit Diagrams 4U is going to give you a wireless power transmitter circuit diagram.This circuit can be operated with 5V power supply. You can use different coils with different Gage and test what gives the maximum power.Here we have used common transistor BD139.

Note:
       # Build this circuit on a PCB
       # Don't supply over 5V

Simple Crystal radio

This is a simple AM crystal radio.You can wind #22 enermale copper magnet wire on cardboard roll..Here we have used 1N34A Crystal diode.If you want to lessen well you can connect ear phone connection to the amplifier.You have to tap L2 and connect it with 20-80 feet antenna.and you have to ground the circuit use a mettle rod for that.

Note: 

   # When you make this circuit be patient because you want be able to get the result at once

Simple Crystal Radio Circuit Diagram

This is a very simple Crystal  Radio Circuit Diagram Circuit.Specialty of this circuit is you can build this circuit diagram by using things which are available at your home.This circuit runs with radio signal that means this circuit doesn't want an extra power.Before using your razor burn it.Then it will become blue color And also Connect the pencil's  rod of lead.It is not mentioned in the circuit diagram.Connect the ground wire to the earth line of your house.

Note:
         Build this circuit on a wood board

Simple AM/FM/SW/MW booster Circuit

Today Free Circuit Diagrams 4U is going to give you a very useful circuit diagram in some countries we can see some radio signals are poor so this is the best answer .Here We have used very common Transistor MPF102 use470uH Coil for short wave and use20uH for L1.You can run this circuit with 9V

Simple Fm circuit Diagram

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

Antenna Amplifier Circuit Diagram

This is an Amplifier circuit diagram We can use this circuit to amplify AM,FM,SW radio waves.Here I have used MPF 102 transistor circuit but If you are unable to find it you can use 2N4406.When you build this circuit diagram build this circuit in a small PCB  you can get  clear radio signals. 

Simple radio circit diagram

some persons asked simple radio circuit diagrams.Here you can see very simple circuit diagram.When I tested this my first time I enjoyed very much.When the signals are coming you can here some sounds like ne ne nee nic nee nee nee nee.so test this and enjoy.

5 to 500 feet transmitter circuit diagram

This is so useful circuit because this circuit can transmit signals 5 feet to 500 feet.Here I have used common transistor 2N5225 If you are unable to find this you can use any general purpose transistor.

FM Transmitter circuit diagram (50M)

This is FM transmitter circuit diagram.By using this circuit diagram you can send signals up to 50M.Here I have used 2N2222 Transistor.This circuit can be operated with 3V

FM Radio Jammer circuit diagram

This is FM radio jammer circuit diagram.This is not legal device in many countries.So dont misuse this.we dont get any response of it.




Note

# This circuit operates with 9V

# L1 make 6 turns of 16AWG enamelled copper wire on a 9mm plastic former.

Simple FM transmitter circuit (88-108MHz)

This is simple transmitter circuit diagram.This circuit has some what good coverage.To tune this circuit use 88MHz-108MHz radio.This circuit can be operated with 9-12V power supply.This circuit needs 30mA.

4W FM transmitter

This is 4W Fm transmitter circuit.This circuit operates with 12V to 16V.Give 400mA power for this.use dipole antenna to transmit signals without connecting antenna don't give power.This circuit works 88~108Mhz

FM Jammer Circuit

Here is a Fm jammer circuit diagram.This circuit transmit VHF signals.Normally powerful oscillation of the circuit interrupt FM signals

AM reciever circuit diagram

This is simple AM reciever circuit diagram.Here I have used femous transsistor BC549.I suppose this will be so useful circuit for you.use the ferrite rod and tuning capacitor from an old radio.