Tag Archives: running light circuit diagram

Running LEDs

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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.

10 Dancing LEDs

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This is the circuit of dancing LEDs which consists of 10 units LEDs. 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… Read more »