LED FLASHER ( About 1Year )

This is so useful circuit diagram for you Because this circuit can light up an LED about 1 year with 9V battery.Here I have used famous IC HEF 4093.






Note

# Use a white colour LED

# Build this on a PCB to get maximum result

# Use 9V battery to power this circuit

9V (2A) power supply circuit diagram

Lots of members asked about 9V dc power supply with 2A.So here We have introduce a new circuit diagram.This circuit can provide 9V 2A.I suppose now you all have some what good power supply with some what good amp level.This circuit operates with famous IC 7809.If I say simply this is a amp booster circuit.







Note

# Build this circuit on a PCB to get maximum result

# If you can attach a heat sink to the IC It will get a long life

Ding Dong Bell circuit diagram

This is a ding dong bell circuit diagram.I have attached this circuit for my house.Even you can use this circuit as an sound generator.When we buy this circuit from the market we have to spend much money but now you can build this your self.Here I have used common Ic Ne 555 and you can operate this circuit with 9V power supply.




Note

# Build this circuit on a pcb

# use 9V power supply to power this circuit

# When you deal with 230V be careful

12V LED Flasher for Cars

This is so wonderful circuit diagram Because you can up grade the out look of you car or van by using this simple circuit .Actually this is a blinking Led circuit on the other hand this circuit is called multivibrator circuit.The impotent thing of this circuit is this circuit can be operated with 12V power supply





Note

# By using R2, R3, C1 ,C2 you can change the speed of the circuit

# Fix this on a pcb

# Don't supply more than 12V

# This circuit can generate about 5W power

Simple ufo Detector Circuit Diagram

This is some what different concept But here I have used very simple method.Most of people in the world find UFOs by looking at the sky most of time we can see some rich people buy cameras and focus them to the sky.But those unites are so expensive here I have shown you very simple diagram.When UFOs pass our area normally those machines out put high magnetic field so here we have used that magnetic power to detect them.when a UFO passes your area the magnet of your circuit will move. then the circuit will be switched on





Note

# Use 3V power supply

# Click this to make UM66 music circuit

Simple Water Level Detector

This is so useful circuit diagram because this circuit helps us to detect water.When the water come and touch the sensors it will make a sound.Here I have used common transistor bc109. Actually you can modify this circuit.. By using a relay you can switch on or off your water motor I will tell you them in my next post.





Note

# Use 6V to power this circuit

# The distance between the circuit and the sensors should be short.

# Build this circuit on a pcb to get good result.

230V Blinking LED

Already I have posted 230V LED circuit diagrams.This circuit is different than those circuits.Because this circuit is blinking circuit.And here I have used common parts so you all can find them easily.Already I have attached this circuit with our doorbell switch then the visitors who visit my place at night can see it well.





Note:-

# When you deal with 230V be careful because it is dangerous
# Fix this circuit in a plastic box

Simple Melody Generator Circuit Diagram

This is so impotent circuit for you all.On the other hand this is so important circuit for beginners.Here I have used IC UM66 You can get various musics when you buy UM66 with different numbers.




Note:

# Don't supply more than 3V

# Build this circuit on a pcb

Simple diagram of Vu meter

This is a simple vu meter people normally use Vu meters to get a good appearance for their amplifiers and for their audio setups.Here I have used common Ic LM3915 and LM3916.You can fix 19 LEDs for this circuit diagram.




Note

# you can operate this circuit with 12V power supply

# Fix this circuit ona PCB to get good result.

NE 555 Pulse generator

Most of our members asked pulse generator circuits. so this is a simple and common circuit.and you can use this with your light circuit diagrams too.



Note

# Don't supply more than 15V

Simple Audio power meter

This is simple audio power meter.When you use high power speakers this circuit is so important Because you can keep your speakers without burning.Here When the speaker out puts 1W green color LED will light up,for 1.5W you will be able to see orange color,When speaker out puts more than 3W you will be able to see red color.





Note

# The power levels mentioned are valid for 4-Ohm speakers. For 8-Ohm speakers you have to divide all the resistor values by two

# this circuit cant drive more than 40W continuously.

# If you want more LEDs you can attach LEDs as the same way

AC powered LED Indicator

This is an indicator you can use this circuit with your Ac electronic items.Here I have used normal Led.Attach purple color connections to the AC line.I suppose this will be a wonderful circuit for you.



Note

# This is not a good circuit for kids Because here we use 230V So don't try to build this.

# Build this circuit on a PCB

Brightness controller circuit diagram for your car

This is brightness controller circuit diagram.You can use this circuit for your car or for your bike.Here I have used famous IC NE 555.




Note

# Use 6V bulbs with this

# Build this circuit on a pcb.

Security alarm

This is Security alarm .If somebody disconnected the wire loop The speaker will generate a sound.I have used a circuit for my land.Then when a robber enter for my land i can know it earlier.when you setup this set the wire loop at the height of 1 feet from the ground.




Note


# Build this circuit on a pcb

# use a thin coil as the wire loop

IR Tester Circuit Diagram

This is an IR Tester circuit diagram.The special thing this circuit is you can measure the strength of the Ir signal by using a volt meeter.This circuit operates with 9Vto 12V.



Note

# Build this circuit on a pcb to get maximum result.

# Use 9Vto 12V