Ring-around-led-flasher
When power is initially applied, two of the LEDs illuminate while the other two remain off until the timing cycle reverses. The LEDs flash in pairs; however, by pressing and holding switch S1 until only one LED is lit, and then releasing it, the four LEDs can be made to flash sequentially. The number of LEDs flashing in a sequential ring can be easily increased to eight by adding another 4001 quad NOR gate. Simply replicate the circuit and connect the additional circuit in series with the first, from input to output, as an extension of the original circuit. When power is connected to the eight-LED flasher circuit, four LEDs will turn on simultaneously and then turn off as the other four LEDs illuminate. As before, pressing and holding switch S1 until all but one LED turns off will initiate the sequential flashing of the LEDs in a circular pattern. It is possible to connect multiple circuits in series as desired.
The described circuit utilizes a 4001 quad NOR gate to control the operation of the LEDs. The basic operation involves a timing cycle that alternates the states of the LEDs, allowing for a visual indication of the timing sequence. The NOR gate configuration enables the creation of a flip-flop effect, which is essential for the sequential flashing of the LEDs.
In the initial state, two LEDs are powered on, indicating that the circuit is functioning correctly. The timing cycle can be adjusted by modifying the resistor and capacitor values in the timing circuit, which determines the flash rate of the LEDs. The sequential flashing feature is activated by user interaction with switch S1, which temporarily overrides the automatic timing sequence.
To expand the circuit to eight LEDs, an additional 4001 quad NOR gate can be integrated into the existing design. This involves duplicating the original circuit and connecting it in series, ensuring that the output of the first circuit feeds into the input of the second. This allows for a seamless transition between the two circuits, creating an extended visual display.
The flexibility of this design permits the addition of even more circuits, enabling the user to create a larger array of flashing LEDs. Each additional circuit requires careful attention to the power supply and grounding to ensure stable operation across all connected units. This modular approach makes the design adaptable for various applications, including decorative lighting, indicators, or educational demonstrations of digital logic principles.When power is first turned on, two of the LEDs are on and the other two remain off until the timing cycle reverses. The LEDs flash in pairs, but by pressing and holding Sl closed until only one of the LEDs is on, and then releasing it, the four LEDs can be made to flash in sequential order.
The number of LEDs flashing in a sequential ring can be easily increased to eight by adding another 4001 quad NOR gate. Just repeat the circuit and connect the additional circuit in series with the first-input to output-as an extension of the first circuit.
When power is connected to the eight-LED flasher circuit, four LEDs will tum on at once and then flash off as the four remaining LEDs come on. As before, just press Sl and hold closed until all but one LED turns off; then the LEDs will begin their sequential march in a circle.
You can connect as many circuits in series as you like.
The described circuit utilizes a 4001 quad NOR gate to control the operation of the LEDs. The basic operation involves a timing cycle that alternates the states of the LEDs, allowing for a visual indication of the timing sequence. The NOR gate configuration enables the creation of a flip-flop effect, which is essential for the sequential flashing of the LEDs.
In the initial state, two LEDs are powered on, indicating that the circuit is functioning correctly. The timing cycle can be adjusted by modifying the resistor and capacitor values in the timing circuit, which determines the flash rate of the LEDs. The sequential flashing feature is activated by user interaction with switch S1, which temporarily overrides the automatic timing sequence.
To expand the circuit to eight LEDs, an additional 4001 quad NOR gate can be integrated into the existing design. This involves duplicating the original circuit and connecting it in series, ensuring that the output of the first circuit feeds into the input of the second. This allows for a seamless transition between the two circuits, creating an extended visual display.
The flexibility of this design permits the addition of even more circuits, enabling the user to create a larger array of flashing LEDs. Each additional circuit requires careful attention to the power supply and grounding to ensure stable operation across all connected units. This modular approach makes the design adaptable for various applications, including decorative lighting, indicators, or educational demonstrations of digital logic principles.When power is first turned on, two of the LEDs are on and the other two remain off until the timing cycle reverses. The LEDs flash in pairs, but by pressing and holding Sl closed until only one of the LEDs is on, and then releasing it, the four LEDs can be made to flash in sequential order.
The number of LEDs flashing in a sequential ring can be easily increased to eight by adding another 4001 quad NOR gate. Just repeat the circuit and connect the additional circuit in series with the first-input to output-as an extension of the first circuit.
When power is connected to the eight-LED flasher circuit, four LEDs will tum on at once and then flash off as the four remaining LEDs come on. As before, just press Sl and hold closed until all but one LED turns off; then the LEDs will begin their sequential march in a circle.
You can connect as many circuits in series as you like.