4.5V To 12V DC

This ic 4.5V to 12V boost circuit.You all can get lots of advantages through this circuit.Here I have used famous IC LM2698.

PNP & NPN Transistors

Lots of beginners had a problem to recognize E,C,B.So I suppose this post will be so useful for them.When I was making circuit diagrams when I was in my child hood I myself also faced for the same situation

The Joule Thief

This circuit is called " The Joule Thief" Because this circuit can light up LEDs with low voltage that is the reason for this.If you have drained batteries you can lite up a LED by using this circuit.Now I thing you can understand how much important this circuit is

LED Flasher circuit Diagram

This is Multi vibrator circuit diagram H ere you can attach up to 4 LEDs.I suppose this circuit will be so useful for all.You can use this circuit to decorate your Wesak Lanterns

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.

Solar battery charger

This is solar battery charger with over charge protection.This circuit depends on IC LM723.Some times some batteries destroy because of charging over the limit.But this circuit contains an over charge protection unite.

Siren for Factories ( 2)

This is powerful siren circuit diagram.You can get lots of supports from this circuit because you can use this circuit for your alarm circuit then you will be able to get maximum results.

Siren for Factories (6W)

This is a siren circuit diagram But this circuit is little bit different.Because this circuit can generate up to 6W power here I have used famous IC 4011

9V to 3V converter

This circuit can generate 3V from 9V power supply.Here I have used common Famous IC LT1073.

12V to DC 300V 55 mA

This circuit can generate 300v from 12V power supply.This circuit operates with common transistors 2N3055 and 2N1305.This circuit can provide 55mA current.you can get fun with this

12V to 6V/7.5V/9V converter

This is good news for vehicle lovers.Because most of you may think to convert 12V to 6V / 7.5V /9V .so this is the circuit to do that you can get 6V/7.5V and 9V from this circuit.Here I have used famous transistor 2N3055.This circuit can generate about 2A

Wesak Flasher with 6 Bulb

Wesak festival is getting near.So I decided to give you a very useful circuit diagram this circuit can drive 650Watt (Lamp 220V ) per Lamp channels.By using VR1 you can control the speed of your lamps.Here I have used very famous Ic 4017 and Ic NE 555.You can directly connect this circuit for 230V.

6V lamp Flasher circuit Diagram

This is 6V lamp flasher circuit diagram.You can use this circuit for your various purposes.or you can use this for your 6V moter bike

Blink LED According to the sound

This is very simple circuit.Here according to the sound you can see the LED is also blinking.Beginners can test this circuit and try to make new thing by using this circuit.That is my will....

One LED Flashing Circuit

This is LED flashing circuit Here I have used common IC LM3909.This circuit operates with 3V power supply.After making two circuits like this you can build a multi vibrator circuit.

100W LED Dimmer Circuit Diagram

This is 220 Ac light dimmer circuit.This circuit can load up to 100W.Use a common diac and common triac for this circuit.By usind VR1 you can contrall the power of load.

How to make a simple motor

This is a simple moter circuit.These pictures show how to make a simple motor.first of all you should take two plates that I have mentioned bellow.and set it up on a wooden plate as picture 3 has shown.Then after take coils and wrap it around the plastic stick. When the stick rotates the coil should have a contact with the current supplier so after wrapping place the coil as picture shows.place a magnet middle of the stick as picture shows.

Electronic Circuit Diagram symbols(3)

This is for beginners.Here there are more symbols

Electronic Circuit Diagram symbols(2)

Here I have given more symbols of circuit diagrams.More symbols will be given in the future

Electronic Circuit Diagram symbols(1)

electronic circuit diagram symbols are mentioned here.There are lots of symbols Thoes symbols will be presented in the future.

Temperature controlled fan Circuit diagram

This is temperature controlled fan circuit.When you use this circuit you don't want to turn the switches when the heat goes up.It is controlled automatically.

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

12V Flashing Lamp Circuit Diagram

This is good news for vehical lovers.This is 12V Flashing lamp circuit.Yuo can use this circuit for your vehical.Here I have used IC LM317T.

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 Intercom Circuit diagram

This is a intercom circuit diagram.you can use this for your office or for your working place.Acoording to the changes of s1a and s1b You can use this as the reciever and the mic



Note

# Use screen wires Between these two circuits

Simple Flasher circuit diagram

Most of you asked about a LED flasher circuit.Here it is.Here I have used famous IC LM3909.This circuit operates with 1.5V

Telephone Spy unit circuit

This is telephone spy unite.You can transmit signals up to 200feet.This circuit operates with 88-94MHz.This circuit doesn't want extra power it uses the power of the line.

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.

Light sensetive alarm circuit

This is light sensitive circuit diagram.You can use this circuit for various things.here when the light fall on LDR it will indicate by an alarm.

Flasher for bike

Here I like to give you a very useful circuit.This is a flasher for your bike this circuit can be operated with 6V (4 x1.5 batteries) .You can control flash duration with 5K VR and flash interval can be adj es with 100K

5V from 1.5V

This circuit is a circuit which can produce 5V from 1.5V.With this circuit you can run various types of things with 1.5V.

Fluorescent lamp Flasher (12V)

This is 12V Fluorescent lamp flasher.I suppose this is an impotent circuit for the car owners.Because you can improve the outlook with this circuit.This circuit operates with 12V power supply.

Flashing Lamp circuit

This is flashing lamp circuit.This circuit operate with 6V power supply.You can fix this circuit for your bick or for your car.Here I have used common transsistor 2N3904.






Note

# Build this on a PCB

# This circuit operates with 6V

Light dimmer circuit ( AC 120W )

This is Ac light dimmer circuit diagram.You can use bulbs up to 120W.Here You can use common VR.Triac should have heat sink.

Lithium battery Charger Variable current

This is a circuit of Lithium Variable battery Charger.It releases current 100mA - 2A



Note

# Fix this circuit on aPCB to get maximum advantage

Horn for cars

This is a car horn.You can fix this for your car to increase the attraction.this circuit releases dual 4-watt.If you want to change the frequency of this circuit change the value of c2 and c3.




Note

# If you can use 1W resistors and compatible parts for 12V.the life time of circuit will be increased.

# Fix on a PCB and cover it with a box.

Security lock

This is so useful circuit for all.This circuit is called security lock.here the pass word of this circuit is 1358.If you like you can change it.After switching on all the numbers circuit will activate.This circuit can be powered with 9V battery.

Sound Generator for Alarm

This is sound generator circuit.You can use this circuit for your alarm circuits.Here I have used common IC 4011.This circuit gives about 10W through a 8 ohm speaker.This circuit can be control (on and off) with sw1.

AC 120 LED Night Lamp

This circuit is 120V LED night lamp.You can use this circuit as an indicator too.When you use the W of those parts be careful.If not circuit will burn.

USB battery Charger circuit

This is usb Battery charger circuit.By using this circuit you can charge your batteries.Here you can charge only 3V batteries.Don't connect more than that.Here I have used common Ic LT1301.

Dry battery charger circuit

this is a dry battery charger circuit diagram.you can charge your dry batteries by using this.Due to Led flasher you can protect Charger battery expire. don't lead battery come to serial while voltage in cell battery lower 1.6V.You can operate this circuit 6V to 9V.

Telephone Watcher circuit diagram

If someone is using your phone line this circuit detect it.and activate an alarm.The person who taped your telephone line will be given a loud tone.Normally phone guards are so expensive in the market but you can fix this under low price.