The main concept of operating this software and hardware  is based on   “monotonic audio signals converting into clock pulses“. User  can  operate  a  device  with monotonic audio signals from phone or any other device which can generate monotonic audio signals. By  using  this  software user  can  program  the  pulses.

TECHNOLOGIES  USED:

  1. JAVA  Standard Edition : Version:7.0
  2. JAVA Micro Edition (J2ME)
  3. HTML (Hyper Text Markup Language)
  4. JAVA SCRIPT 

TOOLS  USED:

  1. JAVA NET BEENS
  2.  WIRELESS  TOOLKIT  2.5.2

SOFTWARES  REQUIRED:

1.       JAVA  STANDARD EDITION  (VERSION 2.0/3.0/4.0/5.0/6.0/7.0)
2.       WIRELESS  TOOLKIT  2.5.

HARDWARE  REQUIRED:

1.       J2ME compatible phone :   It is for produce  programmable  sound  signal.  
2.       555 TIMER :  Here 555 timer used for the producing one second delay. After one second  it  enables  the  latch to give input to  register  from  counter
3.        The  Amplifier and  converter (monotonic  audio  signals  into  clock pulses)  amplifies  the  sound  signal.
4.       Counter :    Counter  will  increments  its  values  by  clock  pulses  given  by  clock  generator.
5.       Latch :       It  is  used  as  gate  for  enabling  and  disabling  data  transfer

WORKING:

1.       The  software  loaded  in  phone  produces  sound  signals. 

2.       The  sound  signals  are  converted  into  clock pulses  by  using  amplifier.

3.       Counter increments its value by  clock pulses  given by  amplifier.

4.       The  same  clock  pulses  resets  the  555  timer. 

5.       If  the  delay  produced  by  555 timer  reaches  1 second  then  it allows the latch  to  enter  data  into  register  then  resets  the  counter.

BLOCK DIAGRAM:


After execution of the  program :
Save program in different formats :
                               
Connecting  through  mobile :
Connecting  through  system :


LED sequencer: follows the rhythm of music or speech, 9V Battery-operated portable unit

The basic circuit illuminates up to ten LEDs in sequence, following the rhythm of music or speech picked-up by a small microphone. The expanded version can drive up to ten strips, formed by up to five LEDs each, at 9V supply. IC1A amplifies about 100 times the audio signal picked-up by the microphone and drives IC1B acting as peak-voltage detector. Its output peaks are synchronous with the peaks of the input signal and clock IC2, a ring decade counter capable of driving up to ten LEDs in sequence.

An additional circuit allows the driving of up to ten strips, made up by five LEDs each (max.), at 9V supply. It is formed by a 10mA constant current source (Q1 & Q2) common to all LED strips and by a switching transistor (Q3), driving a strip obtained from 2 to 5 series-connected LEDs. Therefore one transistor and its Base resistor are required to drive each of the strips used.

Circuit diagram:
Parts:

R1_____________10K 1/4W Resistor
R2,R3__________47K 1/4W Resistors
R4______________1K 1/4W Resistor
R5,R6,R7______100K 1/4W Resistors
R8____________820R 1/4W Resistor
C1,C3_________100nF 63V Ceramic or Polyester Capacitors
C2_____________10µF 50V Electrolytic Capacitor
C4____________330nF 63V Polyester Capacitor (See Notes)
C5____________100µF 25V Electrolytic Capacitor
D1___________1N4148 75V 150mA Diode
D2-D11_________5 or 3mm. LEDs (any type and color)
IC1___________LM358 Low Power Dual Op-amp
IC2____________4017 Decade counter with 10 decoded outputs IC
M1_____________Miniature electret microphone
SW1____________SPST miniature Slider Switch
B1_______________9V PP3 Battery

Additional circuit parts (see Notes):

R9,R10_________10K 1/4W Resistors
R11____________56R 1/4W Resistor
D12,D13 etc.____5 or 3mm. LEDs (any type and color)
Q1,Q2_________BC327 45V 800mA PNP Transistors
Q3____________BC337 45V 800mA NPN Transistor

Notes:
  • The sensitivity of the circuit can be varied changing R4 value.
  • C4 value can be varied from 220 to 470nF in order to change the circuit speed-response to music peaks.
  • Adopting the additional circuit, only one item for R10, R11, Q1 and Q2 is required to drive up to ten LED strips. On the contrary, one item of R9 and Q3 is necessary to drive each of the strips you decided to use.
  • Each R9 input must be connected to IC2 output pins, in place of the LEDs D2-D11 shown. R8 must also be omitted.
  • Whishing to use a lower number of LEDs or LED strips, pin #15 of IC2 must be disconnected from ground and connected to the first unused output pin.
  • For example: if you decided to use 5 LEDs, pin #15 of IC2 must be connected to pin #1; if you decided to use 8 LEDs, pin #15 of IC2 must be connected to pin #9 etc.
  • Current drawing of the circuit is about 10mA.
  • Whishing to use a wall-plug adapter instead of a 9V battery, you can supply the circuit at 12V, allowing the use of up to 6 LEDs per strip, or at 15V, allowing the use of up to 7 LEDs per strip.

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