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




Note

# L2 RFC (resistance 1MOhm with wrapped around her inductor of enough coils from fine isolated wire. Scratch of utmost inductor and you stick in utmost the resistance making thus a parallel L-r circuit.)


# The inductors is air from wire of coaxial 75W or other 1mm roughly.

# Transmitters are illegal in some countries.We have given you this circuit to improve your electronic knowledge.We cant get any responsibility if someone miss used this.you your self should get the responsibility of it.

12V Fluorescent Lamp Circuit

This is 12V Fluorescent lamp circuit.This is useful circuit for vehicle owners.Because they can use this circuit for their car or van.When you check this circuit be careful because this releases about 350V.

230 Blinking LED circuit

This is wonderful circuit.Normally we can light up LEDs with 230v.But those are not blinking.This circuit shows how to make a blinking LED circuit.




Note

# When you use Capacitors use more than 40V

# 230V is dangerous so this circuit is not good for kids.

Voltage Booster Circuit Diagrams

This is voltage booster circuit diagram.you can get 24V from 12V DC.Q1 and Q2 are D1616.If you are unable to find D1616 You can use 2N 3055,C2236,SL 100.



Note

# For high current (around 5A) games use 2N 3055 transistor or more powerful Darlington pairs for Q1 and Q2.

Touch Switch Circuit Diagram

This is touch switch circuit diagram.Here I have used commen Ic NE555.This circuit operates with 5V to 12V.

PWM Speed Motor Controller

This is very useful circuit.When we use high speed moters(Pwm)We need a circuit to boost the speed so this is the circuit for it.This circuit can generate 170-200Hz frequency.This circuit operates with 4.5V to 6V.







Note

# Use IN4148 diodes for this

-5 Volts From a 9 Volt Battery

This is very useful circuit.through this circuit you can get -5V from 9V battery.The especial thing of this circuit is this circuit operate with 9V power supply.




Note

# As D1 and D2 use common diode

# build this on a PCB

Battery Charger Indicator Circuit

This is battery charger indicator circuit diagram.When the battery charges it shows by the LED this circuit can be used with 12V battery with charging current less than 1A.




Note

# Dont use this circuit for the batteries Which has more than 1A charging current
# Fix this circuit on a PCB

FM Jammer Circuit

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




Note

# Jammers are ban in lots of countries so you shouldn't miss use this and you must assemble this circuit on your own responsibility.

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

# connect 30cm long wire as the antenna.

Touch Musical Bell

According to the present situation People are used to use various types of electrical equipments.So I thought to give you a very useful circuit.This is a Touch musical bell circuit diagram.When you just touch TP(touch plate)The circuit will activate.Here I have used very common IC UM 3481.




Note

# use 2W 8 ohm speaker
# This circuit can be operated with 3V power supply

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.

5 Volt power Supply

This is 5 volt power supply circuit diagram.This circuit regulates 5V.Input voltage is 6V to 12V.





Parts

# LM7805
# 100nF condensators
# 100uF condensator
# 10uF condensator
# N4002 diode
# LED
# 470 Ohm resistor

Power Supply with Fixed Voltage

This is useful circuit for you all.This circuit supplies fixed voltage.You can change The voltage by changing U1 and T1.I have mentioned a table according to it you can get the voltage.



Note

# Attach a heat sink for U1.

# When you deal with 230V or 120V Be careful

# you can use this circuit with 230V and 120V.Change The T1 according to Ac current

Automatic Dresses Collector When Rain Comes

This is Little bit strange circuit.But I have used simple method.When the rain comes This circuit collects dresses automatically.So you don't want to collect dresses you yourself.Here I have used common Ic NE 555.Use a relay for the moter.




Note

# According to the power of your moter give the power for the moter power supply.

# Keep the sensor out of your house.

# Manage this circuit as you like.

Dipole Antenna for FM Radio

This is dipole antenna.when you build this you should get the same length.If not you will not be able to get the maximum harvest.Use 60-75 ohm coxial cable.












Note

# when you use insulators becareful.Because if they grounded you cant get goot result