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

Mini FM Transmitter Circuit Diagram

This is a some what powerful transmitter.Here I have used famous Transistor 2N2222.This circuit operates with 3V power supply.To make L1 wind 5 turns of 24AWG wire on a 1cm plastic former.

Dark Activated Micro circuit diagram

This is dark activated circuit diagram.But the importance of this circuit is the size of this circuit.Here I have used famous transistor 2N3904.Here I have used photo transistor.

Fm Transmitter (200M)

This is a Fm Transmitter circuit.This circuit can Transmit signals up to 200M.L1 is 1mH inductor.When I built this circuit I used PCB.





Note

# Make inductor with the support of this formular L = (d²n²) / (18d+40l)

L is the inductance of the coil in uH
d is the coil diameter in inches
l is the coil length in inches
n is the number of turns


# Use 12V power supply for this circuit.

# Build this circuit on a PCB

Mini FM Transmitter Circuit Diagram

Most of you ask about transmitter circuits so I thought to give you this circuit.Here I have used famous IC UPC1651.This circuit Can be operated with 5V power supply.



Note

# Use a copper wire as an antenna

# Don't give more than 6V for this circuit.

# Build this on a PCB.

Human Reaction Checker Circuit

This is wonderful circuit.by using this circuit you can measure whether you have good reactions or not because If you don't have speed reactions you are unable to get decisions quickly.Just think you are driving your vehicle at once a person appeared in front of your vehicle.at that situation you must have quick reaction to stop your vehicle.This circuit allow you to check it.If it is weak by practicing with this circuit you can improve it.





Here this LED blinks every 1.5s.But the light will appear only for 0.1s within that short period you must try to press the button.try this

Sound activated ( switch off) Switch

This circuit is a sound activated switch.After making a sound you can switch off this circuit.If you want to switch on this circuit after the sound use a relay for that.(That means When the relay switch on the circuit will switch off And when the relay switch off circuit will switch on)



Note

# This circuit operates with 3V power supply

# build this on a PCB

Digital Dice Circuit diagram

This is digital dice circuit diagram.Here I have used IC CD4060B.After pressing.S2 to to play you will be able to listen a sound too.I think this will be a wonderful circuit for you all.now you can play your games with your digital dice.



Note

# This circuit operates with 9V power supply

# Build this circuit on a PCB.