Here is an LED light sequencer circuit using CD4017 and IC-555. The IC 555 timer generates an astable multivibrator or low-frequency oscillator. It sent to the IC-4017 will cycle through 10 count sequence. Next each LED, one at a timing light up, and replay back to first. This is a sequence of flashing lights.
We can adjust the speed with the resistor and capacitor on the IC-555 circuit.
Simple 12 LED light sequencer circuit
Here is a 12-LED light sequencer circuit using CD4017 and NE555 as main components. We modified it from the LED Chaser circuit. The difference is that the light starts from two ends and then meets in the middle, and both go back to the start, and the process is repeated. (Continue reading for a better understanding)
How it works
The circuit may be easily divided into two sections as follows:
- Pulse Generator
- The counter and LED
First, the pulse signal generator section includes IC1-NE555, R1, VR1, C1, and C2. The signal output from pin 3 will be in a square waveform, which frequencies can be adjusted by VR1.
Secondly, the counter receives that signal to the input(pin 14) of the IC2 decade counter.
The IC2 will then count the input signal continuously and output “1” to pins 3, 2, 4, 7, 10, 1, 5, 6, 9, and 11 respectively.
The connecting LEDs to display in this circuit will see that is LED running two way from middel.
Parts you will need
IC1: NE555 Timer
IC2: CD4017, Decade counter with 10 Decoded Outputs IC
C1: 1µF 50V, Electrolytic Capacitors
C2: 0.01µF 50V, Ceramic Capacitors
C1: 10µF 50V, Electrolytic Capacitors
R1, R2: 1.5K, 0.25W Resistors tolerance: 5%
R3: 220Ω, 0.25W Resistors tolerance: 5%
VR1: 100K Potentiometer
LED1-LED12, as you like
D1-D10: 1N4148, 75V 150mA
B1: 9V battery or the 5V to 12V power supply
We tried to assemble this circuit on a breadboard. It works fine.
Try turning VR1 to adjust the speed of the running lights.
20 LED Running Light circuit
This circuit is a circuit run on alternating two colors. It uses the 2-color LED with a built-in 3-pin single. This will chase away the glow of each LED until the end. It turns alternating to another color. In any way to the moon on the moon’s first end, then the LED end of the first LED. The Circuit consists of, NAND gate ic. Two 10 Counter circuits IC, and IC JK flip flop.
The operation of the circuit is divided into 3 sets. It is a set of signal generators, a set of display and control. Set the signal generator is IC1a, and IC1b number 4011 is a signal generator. The R2, R3, C2 determine the frequency generated.
The signal is fed to a set of impressions is the number 4011 IC2 and IC3. The 10 counter circuits to output to the LED, and Is the same, but the work must be performed one at the side.
Therefore, the signal from pin 11 of IC 2 and tested for D2 and D3, To pin 3 of IC4.The integrated circuit IC 4 is a JK flip flop is connected to a T flip flop. The signal input pin 3 and pin 1 is the output signal. Which sends a signal to the Reset IC either stop working.IC4 on the anniversary, it will output the first time, in contrast to pin1.IC3 make work, IC2 stopped.
IC2 is controlled by signals from pin 1 of IC4, to IC1c.Prior to control IC2.The IC3 is connected to pins 1 through D1 to the control again.
LED Arrow running light for safety car
Imagine that your car is broken on the way home. The battery is damaged or has run out of power.
At that time, very late at night.
How to make the rear car know And slow down. To reduce accidents. This LED Arrow running light circuit may help you.
How it works
See in the circuit below. It is one type of LED chaser circuit. Also, it can drive LEDs run. We should many circuit form, right?
This circuit we use CMOS digital IC, CD4093, CD4520, and CD4094.
Use a total of 17 LEDs. To show on Arrow form.
Adjust the speed with resistors R1.
When entering the power supply to the circuit IC1.
A NAND gate IC Oscillator generator circuit is connected to the input signal generator to pin 1 of IC2 and pin 3 of the IC3.
When receiving the signal from IC1 IC2 will serve up the signal from the logic into the binary.
Then sent to the pin 5 and pin 6 of IC1, IC1, which will process a NAND gate.
The IC3 is the signal from IC1 to processing and export of pin 4, 5, 6 and 7.Then entered into the base of the transistor pins Q1-Q4.
Any work on the transistor connected to the LED pin collector will glow out come.
For the format of the 17 LED Lights, arranged as a form of directional arrows.
Parts you will need
IC1: CD4093, Quad 2 input Schmitt NAND Gate IC
IC2: CD4520, CMOS Dual Binary Up-Counter
IC3: CD4094, 8-Bit Shift Register / Latch with 3-STATE Outputs
Q1-Q4: BC337, 45V 0.8A NPN Transistor
LED1-LED17: As you like
0.25W Resistors, tolerance: 5%
R2, R4, R6, R8: 10K
R3, R5, R7, R9: 4.7K
R10, R11, R12: 470Ω
C1: 4.7uF 25V Electrolytic
C2: 220uF 25V 220uF 25V
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