Research -Ic 4017
BRIEF DESCRIPTION OF DIWALI LIGHTS
The Basic Circuit
[pic]
FIGURE 1
As you can see in the above diagram that IC LM4017 will give 10 different O/P's.
Now here I have used this circuit for a 5 Channel Sequencer (The word sequencer seems very tough but the circuit is as simple as you can think).
Looking at the Data Sheet of IC LM4017 we observe that we do not need any extra components to drive this IC (and that is what makes our CKT very compact).
[pic]
Now build 11 circuits as mentioned in FIGURE 1. You can assemble all 11 circuits on one multipurpose board.
Now Number the 4017's as No1,No2.....No.11.
Assume IC No1 to be the Master IC to drive IC's No.2 to No.11 (Ten IC's).
The Master IC's oscillation time period should be at least 15 seconds, for which you need to modify the circuit at Pin No.6,7 & 8 of IC 555.
Connect all (-) Minus as common to all IC's.
Connect the O/Ps of IC 1 (Switching Pulse/Trigger) to the switching transistors as mentioned in figure below. You will need 10 such circuits, one for each IC.
[pic]
As shown in the above figure Input (Pulse/Trigger) from Master IC No.1 is connected to the Collector of Transistor c1815 and Emitter of c1815 is connected to Collector of 2n2222. Output is obtained from Emitter of 2n2222, +12 volts (Power Supply to Subsequent IC's No.2 to IC No.11). Now the Master IC No.1 will be able to switch IC No.2 to IC No.12 sequentially.
Please refer the circuit given below.
The important part is the clock generator IC555.
The 1st circuit is designed for long duration pulse ie. the time period of patterns to be displayed.
The 2nd circuit is designed for short period pulse ie. the speed of a particular pattern.
[pic]
I have used the circuit for 5 channels (or say 5 LEDs)
The benefit is that 4017 has 10 O/Ps and even two patterns can be generated from one single 4017. (Don't be confused you'll get the idea when work on it.)
[pic]
Now let us assume our channels 1 -5 to be as
The Basic Circuit
[pic]
FIGURE 1
As you can see in the above diagram that IC LM4017 will give 10 different O/P's.
Now here I have used this circuit for a 5 Channel Sequencer (The word sequencer seems very tough but the circuit is as simple as you can think).
Looking at the Data Sheet of IC LM4017 we observe that we do not need any extra components to drive this IC (and that is what makes our CKT very compact).
[pic]
Now build 11 circuits as mentioned in FIGURE 1. You can assemble all 11 circuits on one multipurpose board.
Now Number the 4017's as No1,No2.....No.11.
Assume IC No1 to be the Master IC to drive IC's No.2 to No.11 (Ten IC's).
The Master IC's oscillation time period should be at least 15 seconds, for which you need to modify the circuit at Pin No.6,7 & 8 of IC 555.
Connect all (-) Minus as common to all IC's.
Connect the O/Ps of IC 1 (Switching Pulse/Trigger) to the switching transistors as mentioned in figure below. You will need 10 such circuits, one for each IC.
[pic]
As shown in the above figure Input (Pulse/Trigger) from Master IC No.1 is connected to the Collector of Transistor c1815 and Emitter of c1815 is connected to Collector of 2n2222. Output is obtained from Emitter of 2n2222, +12 volts (Power Supply to Subsequent IC's No.2 to IC No.11). Now the Master IC No.1 will be able to switch IC No.2 to IC No.12 sequentially.
Please refer the circuit given below.
The important part is the clock generator IC555.
The 1st circuit is designed for long duration pulse ie. the time period of patterns to be displayed.
The 2nd circuit is designed for short period pulse ie. the speed of a particular pattern.
[pic]
I have used the circuit for 5 channels (or say 5 LEDs)
The benefit is that 4017 has 10 O/Ps and even two patterns can be generated from one single 4017. (Don't be confused you'll get the idea when work on it.)
[pic]
Now let us assume our channels 1 -5 to be as