Micro-Project : Build A Circuit For LED Flasher
brief Introduction
LED Flasher is a simple circuit which will blink the LEDs in regular time period. This circuit can be used for decoration purpose or can be used for a signaling purpose and many more. A LED flasher circuit is a circuit which flashes the LED- meaning turns it ON-OFF, ON-OFF, ON-OFF.
The 555timer chip is a very versatile IC, because when connected correctly, it can it can create pulses of current at specific time intervals decided by the resistor-capacitor (RC) network. When a 555 timer creates pulses in this way, the LED doesn't stay constantly on. It only turns on at a constantly on. It only turns on at a pulse and pulse and then shuts off after the pulse has passed.
And it does this in a never-ending cycle, which creates the flashes of light. To make the 555 timer chip create pulses, it must the 555 timer chip create pulses, it must be placed in a stable mode. A stable mode simply means that the 555 timer has no stable state. It switches constantly between high and low, or on high and low, or on and off. This is why this and off.
This is why this mode is also called oscillator mode, because it
uses the 555 timer an oscillator, which creates square wave signals.
Aim of the Micro-Project
Build A Circuit for LED Flasher
Intended Course Outcomes
1. Use number system and
codes for interpreting working of digital system.
2. Use Boolean expressions to
realize logic circuits.
3. Build simple combinational
circuits.
4. Build simple sequential
circuits.
5. Test data converters and PLDs in digital electronics systems.
Literature Review
Most of the research and writings on LED Flasher. LED Flasher is a simple circuit which will blink the LEDs in regular time period. This circuit can be used for decoration purpose or can be used for a signaling purpose and many more. A LED flasher circuit is a circuit which flashes the LED- meaning turns it ON-OFF, ON-OFF, ON-OFF.
The 555timer chip is a very versatile IC, because when connected correctly, it can it can create pulses of current at specific time intervals decided by the resistor-capacitor (RC) network. When a 555 timer creates pulses in this way, the LED doesn't stay constantly on. It only turns on at a constantly on. It only turns on at a pulse and pulse and then shuts off after the pulse has passed. And it does this in a never-ending cycle, which creates the flashes of light. To make the 555 timer chip create pulses, it must the 555 timer chip create pulses, it must be placed in a stable mode.
A stable mode simply means that the 555 timer has no stable state. It switches constantly between high and low, or on high and low, or on and off. This is why this and off. This is why this mode is also called oscillator mode, because it uses the 555 timer an oscillator, which creates square wave signals. The 555 timer is made to The 555 timer is made to be configured as a be configured as a stable multi-vibrator. The potentiometer which is connected to the timer should which is connected to the timer should be preset and also to adjust the blinking or flashing speed of the LEDs.
The bicolor LEDs are used in this The bicolor LEDs are used in this circuit and circuit and connected to each other as shown in the schematic. The PWM signal is the output schematic. The PWM signal is the output of the 555timer given to transistor, which acts as an inverter. When the pulse generated by 555 timers is low, transistor will get ON and LEDs will get ON. When the input of transistor is high, transistor will get OFF and LEDs are made OFF.
This ON/OFF of LEDs will go for every pulse width signal cycle. This mechanism will make the LEDs flashing. Insert the 555 IC timer in the middle of the breadboard. Connect pin 2 of the IC to the negative rail of the breadboard. breadboard. Connect Connect pin 8 & pin 4 of the IC to the positive rail of the breadboard. breadboard. Connect Connect pin 2 of the IC to pin 6 of the IC and the negative terminal to the negative rail of the breadboard. Connect pin 6 of the IC to pin 3 of IC using 47 kOhms resistor.
Connect the positive positive terminal terminal of the 10 micro F capacitor to pin 2 of the IC and the negative terminal to the negative rail of the breadboard. Insert an LED on the breadboard. breadboard. Which is Anode connected connected to the positive rail of the breadboard and its cathode connected to pin 3 of the IC using 220 ohms resistor. Insert another LED of the breadboard which is cathode connected to the negative rail of the breadboard breadboard and anode connected connected to the pin 3 of the IC using other 220 ohms resistor. Finally, connected the battery on mobile charger to the breadboard. V.
Conclusion The students therefore conclude that the LED Flasher is challenging to produce produce because because is not easy to make an output. For some reason, the electronic components required are not so familiar to the students although simple to see but hard to do. To function the LED Flasher the students need to study on how to connect the components properly. VI.
Proposed Methodology
An information In this Project we have learned To create LED Flasher Circuit. The blinking LED circuit is like the electronics version of the “Hello World”-program. It’s a simple electronic circuit that gives you a visual cue if it works. It was the first circuit I ever built, and it felt GREAT! Insert the 555 IC timer in the middle of the breadboard. Connect pin 2 of the IC to the negative rail of the breadboard. breadboard.
Connect Connect pin 8 & pin 4 of the IC to the positive rail of the breadboard. breadboard. Connect Connect pin 2 of the IC to pin 6 of the IC and the negative terminal to the negative rail of the breadboard. Connect pin 6 of the IC to pin 3 of IC using 47 ohms resistor. Connect the positive positive terminal terminal of the 10 micro F capacitor to pin 2 of the IC and the negative terminal to the negative rail of the breadboard. Insert an LED on the breadboard.
breadboard. Which is Anode connected connected to the positive rail of the breadboard and its cathode connected to pin 3 of the IC using 220 ohms resistor. Insert another LED of the breadboard which is cathode connected to the negative rail of the breadboard breadboard and anode connected connected to the pin 3 of the IC using other 220 ohms resistor. Finally, connected the battery on mobile charger to the breadboard. V.
Conclusion The students therefore conclude that the LED Flasher is challenging to produce produce because because is not easy to make an output. For some reason, the electronic components required are not so familiar to the students although simple to see but hard to do. To function the LED Flasher the students need to study on how to connect the components properly.
Resources Required
|
S.
No. |
Name
of Resources/material |
Specification |
Remarks |
|
1.
|
·
Transistor |
BC547 |
|
|
2.
|
·
Resistor |
1k |
|
|
3.
|
·
Red LED |
|
|
|
4.
|
·
Capacitor |
470µF |
|
|
5.
|
Battery |
9 v |
|
Build A
Circuit For LED Flasher
Rationale
In the present scenario most of the electronic equipment like computers, mobiles, music systems, ATM, automation and control circuits and systems are based on digital circuits which the diploma electronic engineering passouts (also called technologists) have to test them. The knowledge of basic logic gates, combinational and sequential logic circuits using discrete gates as well as digital ICs will enable the students to interpret the working of equipment and maintain them. After completion of the course, students will be able to develop digital circuits based applications.
Course Outcomes Addressed
1. Use number system and
codes for interpreting working of digital system.
2. Use Boolean expressions to
realize logic circuits.
3. Build simple combinational
circuits.
4. Build simple sequential
circuits.
5. Test data converters and
PLDs in digital electronics systems.
Literature Review
Most of the research and writings on LED Flasher. LED Flasher is a simple circuit which will blink the LEDs in regular time period. This circuit can be used for decoration purpose or can be used for a signaling purpose and many more. A LED flasher circuit is a circuit which flashes the LED- meaning turns it ON-OFF, ON-OFF, ON-OFF. The 555timer chip is a very versatile IC, because when connected correctly, it can it can create pulses of current at specific time intervals decided by the resistor-capacitor (RC) network.
When a 555 timer creates pulses in this way, the LED doesn't stay constantly on. It only turns on at a constantly on. It only turns on at a pulse and pulse and then shuts off after the pulse has passed. And it does this in a never-ending cycle, which creates the flashes of light. To make the 555 timer chip create pulses, it must the 555 timer chip create pulses, it must be placed in a stable mode. A stable mode simply means that the 555 timer has no stable state. It switches constantly between high and low, or on high and low, or on and off.
This is why this and off. This is why this mode is also called oscillator mode, because it uses the 555 timer an oscillator, which creates square wave signals. The 555 timer is made to The 555 timer is made to be configured as a be configured as a stable multi-vibrator. The potentiometer which is connected to the timer should which is connected to the timer should be preset and also to adjust the blinking or flashing speed of the LEDs. The bicolor LEDs are used in this The bicolor LEDs are used in this circuit and circuit and connected to each other as shown in the schematic. The PWM signal is the output schematic. The PWM signal is the output of the 555timer given to transistor, which acts as an inverter.
When the pulse generated by 555 timers is low, transistor will get ON and LEDs will get ON. When the input of transistor is high, transistor will get OFF and LEDs are made OFF. This ON/OFF of LEDs will go for every pulse width signal cycle. This mechanism will make the LEDs flashing. Insert the 555 IC timer in the middle of the breadboard. Connect pin 2 of the IC to the negative rail of the breadboard. breadboard. Connect Connect pin 8 & pin 4 of the IC to the positive rail of the breadboard. breadboard. Connect Connect pin 2 of the IC to pin 6 of the IC and the negative terminal to the negative rail of the breadboard. Connect pin 6 of the IC to pin 3 of IC using 47 ohms resistor.
Connect the positive positive terminal terminal of the 10 micro F capacitor to pin 2 of the IC and the negative terminal to the negative rail of the breadboard. Insert an LED on the breadboard. breadboard. Which is Anode connected connected to the positive rail of the breadboard and its cathode connected to pin 3 of the IC using 220 ohms resistor.
Insert another LED of the breadboard which is cathode connected to the negative rail of the breadboard breadboard and anode connected connected to the pin 3 of the IC using other 220 ohms resistor. Finally, connected the battery on mobile charger to the breadboard. V. Conclusion The students therefore conclude that the LED Flasher is challenging to produce produce because because is not easy to make an output. For some reason, the electronic components required are not so familiar to the students although simple to see but hard to do. To function the LED Flasher the students need to study on how to connect the components properly. VI.
|
No. |
Name
of Resources/material |
Specification |
Remarks |
|
1.
|
·
Transistor |
BC547 |
|
|
2.
|
·
Resistor |
1k |
|
|
3.
|
·
Red LED |
|
|
|
4.
|
·
Capacitor |
470µF |
|
|
5.
|
Battery |
9 v |
|
Circuit diagram
Skill Developed / learning out of this
Micro-Project
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Technical Skills: ...
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Communication Skills: ...
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Problem Solving Skills: ...
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Decision Making Skills: ...
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Leadership Skills: ...
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Performance Skills: ...
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Team Building Skills: ...
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