1.
|
LED/Motor activated by
voice
|
|
.
This project demonstrates voice activated dancing LED. A small condenser
mic detects the voice and turns on and off the LED light with the intensity
of the sound. Alternatively you can also use a motor that will rotate a
flower or a small water pump that pump water when someone make a noise or
whistle in front of the condenser mic. The project requires just three
transistors, a condenser mic and a few resistors and capacitors.
|
|
|
|
The
condenser mic is very small and you may have to hold it near to your mouth.
When using LED you may observe that the circuit is not sensitive, this is
because the LED requires a minimum of 0.8 volt to start glowing.
If
you are using an ordinary bulb or motor you can see that the response to
sound is much better.
You
can have a lot of fun by having a variety of electronic components
connected to the output
Below
is the picture of the project built on breadboard with a motor connected to
the output.
|
|
|
|
|
|
Tip on condenser mic: The
condenser mic comes with three pins and two pins. If there are only two
pins you can see that one of the pin is connected to the outer shell. make
sure that this pin is connected to the capacitor C3. If there are three
pins the output pin will be connected the capacitor, the other two pins
will be connected to the negative and the resistor.
|
LIST OF PARTS USED IN THE PROJECT
|
|
REF
|
PART TYPE
|
PART NAME
|
VALUE
|
COUNT
|
INFO
|
|
Bat1
|
BATTERYPACK
|
Battery Pack 3V AA
|
--
|
1
|
|
|
C1
|
ELECCAPACITOR
|
Electrolytic
Capacitor 10uF
|
10uF
|
1
|
|
|
C2
|
CAPACITOR
|
Capacitor 10n
|
10n
|
1
|
|
|
C3
|
CAPACITOR
|
Capacitor 100n
|
100n
|
1
|
|
|
LED1
|
LED
|
LED Green
|
GreenLED
|
1
|
|
|
Mic
|
MIC
|
Condenser Mic
|
--
|
1
|
|
|
Mot
|
MOTOR
|
Toy Motor 3V
|
3V-
|
1
|
|
|
R1,R6
|
RESISTOR
|
Resistor 470Ohm
|
470Ohm
|
2
|
|
|
R2
|
RESISTOR
|
Resistor 1M
|
1M
|
1
|
|
|
R3
|
RESISTOR
|
Resistor 8.2K
|
8.2K
|
1
|
|
|
R4
|
RESISTOR
|
Resistor 1K
|
1K
|
1
|
|
|
R5
|
RESISTOR
|
Resistor 220Ohm
|
220Ohm
|
1
|
|
|
R7
|
RESISTOR
|
Resistor 10K
|
10K
|
1
|
|
|
TR1
|
TRANSISTOR
|
Transistor BC557
|
557BC
|
1
|
|
|
TR2,TR3
|
TRANSISTOR
|
Transistor BC547
|
547BC
|
2
|
|
|
|
|
Welcome to My Blog
