We bring forth Electronic Lucky Number Circuit for our valued clients. Electronic Lucky Number is designed for finding out lucky number. Hobbyists may use Electronic Lucky Number to find their lucky number. When switch S1 is pressed, circuit starts counting and when it is released, it will display the random number on 7-segment display and that will be your lucky no.
About the Circuit :                
Electronic Lucky Number is very simple and easy to use. It is built around clock generator and counter IC as shown in the circuit diagram.

When switch S1 is pressed, IC1, which is a timer IC starts generating clock pulses. The frequency of which is determined by resistor/capacitor network designed around R8-P1/R9/C2. The frequency can be varied with the help of preset P1. Capacitor C1 is charged during this time.
The output clock pulses generated by IC1 at pin3 are given to IC2, which is a decade counter IC. At every clock pulse at pin14 of IC2, starts counting from 0 to 9. This BCD code is converted into 7-segment display by IC3.
Once S1 is released, the capacitor C1 discharges through R8/P1. Thus the frequency of IC1 decreases (and hence the rate of changing figures on the display) and ultimately becomes zero. Once IC1 has totally discharged, thereby, stop the display at a particular figure.
The figure displayed is enhanced by the times for which S1 is pressed. Therefore, the random effect is a natural outcome.
The circuit requires DC power supply of 5V, which is designed using IC4, diodes D1/D2 and capacitor C4.

We bring forth Electronic Lucky Number Circuit for our valued clients. Electronic Lucky Number is designed for finding out lucky number. Hobbyists may use Electronic Lucky Number to find their lucky number. When switch S1 is pressed, circuit starts counting and when it is released, it will display the random number on 7-segment display and that will be your lucky no.
About the Circuit :                
Electronic Lucky Number is very simple and easy to use. It is built around clock generator and counter IC as shown in the circuit diagram.

When switch S1 is pressed, IC1, which is a timer IC starts generating clock pulses. The frequency of which is determined by resistor/capacitor network designed around R8-P1/R9/C2. The frequency can be varied with the help of preset P1. Capacitor C1 is charged during this time.
The output clock pulses generated by IC1 at pin3 are given to IC2, which is a decade counter IC. At every clock pulse at pin14 of IC2, starts counting from 0 to 9. This BCD code is converted into 7-segment display by IC3.
Once S1 is released, the capacitor C1 discharges through R8/P1. Thus the frequency of IC1 decreases (and hence the rate of changing figures on the display) and ultimately becomes zero. Once IC1 has totally discharged, thereby, stop the display at a particular figure.
The figure displayed is enhanced by the times for which S1 is pressed. Therefore, the random effect is a natural outcome.
The circuit requires DC power supply of 5V, which is designed using IC4, diodes D1/D2 and capacitor C4.