LED FLASHER WITH LM3909 CIRCUIT SCHEMATIC DIAGRAM

LED FLASHER WITH LM3909 CIRCUIT SCHEMATIC DIAGRAM

this is circuit of LED Flasher with LM3909 schematic design.

RUNNING LEDS CIRCUIT SCHEMATIC DIAGRAM

RUNNING LEDS CIRCUIT SCHEMATIC DIAGRAM
This is running LEDs circuit which use timer ID NE555N and logic IC 4017N. IC 555 act as a multivibrator and generate frequency to be used for 4017 clock input. R2 is a linear potensiometer to adjust clock frequency and of course the frequency of the blinking LEDs as well.

LED COLOR FADE EFFECT CIRCUIT SCHEMATIC DIAGRAM

LED COLOR FADE EFFECT CIRCUIT SCHEMATIC DIAGRAM

This is the circuit of LED color fade effect. Just like the name of the circuit, the light intensity of LEDs in this circuit will fade from high intensity to low intensity and then off.

CIRCUIT 10 DANCING LEDS SCHEMATIC DIAGRAM

CIRCUIT 10 DANCING LEDS SCHEMATIC DIAGRAM
The 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