Heart Shaped Serial LED Flasher using 4017 and 555 IC

This circuit uses the 555 IC and 4017 IC to flash the LED's one by one placed in shape of a Heart shaped , hence named LED flasher circuit.
The 4017 is a decade counter which flashes the LED's one by one depending upon the clock signal received by it , here 555 produces clock signal and thus drives the 4017 IC to produce output at its pins.
The output LED's can be easily connected in a Heart Shape in order to Make a nice flashing Heart effect.This circuit can be made on a PCB and can be given to your loved ones , thus making it a perfect home made DIY electronic gift for your loved ones.

The speed of flashing can be controlled by the variable resitor , higher the value the slowly LED's will flash and slower the resistance value , the faster the LED's will Flash.
Also the Capacitacnce at pin 2 if 555 can be changed to get particular speed of flashing of LED's.

COMPONENTS REQUIRED :

1.one 555 IC

2.one 4017 IC

3.one 100k Resistor

4.one 100k Variable resistor

5.one 1uF Electrolytic capacitance

6.one 220R resistance

7.eight RED LED's

8.one 6-12v supply

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Electronic Cricket Match Game using 555 IC and Decade Counter 4017

The Electronic Cricket Match game is presented below, the circuit has 8 LED which represent
 various states in a cricket game - 2 runs ,six ,bowled etc.

When the Push Switch S1 is pressed momentarily, the Astable operates and all the LEDs run very fast sequentially. When S1 is released, any one of the LED stands lit which indicates the status of the match. For example, if LED D7 remains lit, it indicates Sixer and if LED 8 remains lit, it indicates Catch out.
Label each LED for its status as shown in the diagram. Pressing of S1 simulates Bowling and Running LEDs indicates running of Batsman.

 IC1-555 is wired as an Astable Multivibrator with the timing elements R1, R2 and C1. With the shown values of these components very fast output pulses are generated from the Astable. Output from IC1 passes into the input of IC2 which is the popular Johnson Decade counter CD4017. It has 10 outputs. Of these 8 outputs are used. Output 9 ( pin9) is tied to the reset pin 15 to repeat the cycle. When the input pin 14 of IC2 gets low to high pluses, its output turns high one by one. Resistor R3 keeps the input of IC2 low in stand by state to avoid false indications.

COMPONENTS USED :

1.one 555 IC

2.one 4017 IC Decade Counter

3.two 12K resistances

4.one 10K resistance

5.one 100ohm resistance

6.one 1uF Electrolytic Capacitor

7.one 1nF Ceramic capacitor

8.Eight LED (different colors , if possible)

9.one Push Button

10.one 5-12v Supply

 ( NOTE - In Pics below i ommited the 100 ohm Resistor along along LED's as the voltage across LED's was 1.7v so there was no possibility of burning of LED's . Also The value of capacitor on pin 2 of 555 can be changed to higher value of 10uF to decrease the speed of sequential LED flashing when push button is pressed )

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