This is the circuit diagram of dancing LEDs which consists of 10 units LEDs. The 10 dancing LEDs circuit works like a audio level meter. The LEDs will be dance sequence with the sound level that entering the microphone.
Components list:
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_____________10΅F 50V Electrolytic Capacitor
C4____________330nF 63V Polyester Capacitor (See Notes)
C5____________100΅F 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
Clip for 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
How the circuit works:
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 strip used.
Circuit Notes:
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plz , send full detail of 10 dancing LEDs project circuit layout,circuit diagram
why does the LED’s light up when an input is detected, you mean it lights up all at the same time? What should i do if I just want them to light up all at the same time when i talk into the microphone?
How does this circuit work, the LED's light up when an input is detected, you mean it lights up all at the same time? What should i do if I just want them to light up all at the same time when i talk into the microphone?
please tell me how to included .. the additional circuit and where is the inter-connection of the main ckt with the additional one......plz tell me soon, I have included it in my college project
plz , send full detail of 10 dancing LEDs project circuit layout,circuit diagram
please give me layout of 10 dancing led.
THANKS FOR GIVE ME THIS CIRCUTE
i mean is it used or not..coz wen i used it my ckt was nt working...plz plz plz help me...
what is the capacitor c5 used...
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i am making this dancing leds circuit but what i do with pin no. 12 od IC2...please help me
pin # 12 of 4017 is not used (no connection / N/C)