Making Traffic Lights with Arduino Uno - Beginner Level (algorithm, coding, circuit design)
Summary
TLDRIn this instructional video, the host guides viewers through building a traffic light system using an Arduino kit. The project involves programming LEDs to mimic a traffic light sequence: red for 3 seconds, yellow for 1 second, followed by green for 3 seconds and a green light blink pattern. The video outlines the components needed, including LEDs, resistors, jumper wires, a breadboard, and an Arduino Uno. The host demonstrates the setup and coding process, encouraging viewers to subscribe for more educational content.
Takeaways
- 😀 The video is a tutorial on how to create a traffic light using an Arduino kit.
- 🔧 The presenter has ordered an Arduino kit, which includes a jacket and a simple traffic light project.
- 📹 The audience is encouraged to subscribe to the channel for more similar content.
- 🚦 The project involves creating a traffic light with red, yellow, and green LEDs following a specific algorithm.
- ⏱ The traffic light sequence includes red for 3 seconds, yellow for 1 second, both off, green for 3 seconds, and a green light blink for 0.5 seconds three times.
- 🔌 The components required for the project are three LEDs, jumper wires, 100-ohm resistors, a breadboard, and an Arduino Uno microcontroller.
- 🔩 The LEDs are connected to the breadboard with the anode on the right side and resistors to limit the current.
- 🔋 The power supply is set up with a 4-cell unit, each cell providing 1.5 volts.
- 📝 The Arduino code involves setting digital pins 8, 10, and 12 as outputs and controlling the LEDs according to the traffic light algorithm.
- 💻 The presenter demonstrates the code compilation and upload process to the Arduino board.
- 🎥 The final demonstration shows the traffic light functioning as expected, with the LEDs lighting up in sequence and blinking as programmed.
Q & A
What is the main project discussed in the video?
-The main project discussed in the video is creating a traffic light using an Arduino kit.
What are the colors of the LEDs used in the traffic light project?
-The colors of the LEDs used in the project are red, yellow, and green.
How long does the red light stay on according to the algorithm?
-According to the algorithm, the red light stays on for 3 seconds.
What is the duration for which the yellow light is kept on?
-The yellow light is kept on for 1 second.
How many times does the green light blink, and for how long each time?
-The green light blinks three times, each for half a second.
What are the components required for the traffic light project?
-The components required for the project are three LEDs, jumper wires, 100 ohm resistors, a breadboard, and an Arduino Uno microcontroller.
Which pins on the Arduino Uno are used for the red, yellow, and green LEDs?
-The pins used for the red, yellow, and green LEDs are 8, 10, and 12 respectively.
What is the purpose of the resistors in the circuit?
-The resistors are used to limit the current flowing through the LEDs, preventing them from drawing too much power and getting damaged.
How does the video describe the process of coding for the traffic light project?
-The video describes the coding process by explaining the use of the 'setup' and 'loop' functions, digital write commands for the LEDs, and the timing for each light state.
What is the final step shown in the video after uploading the code?
-The final step shown in the video is resetting the Arduino and observing the traffic light functioning as per the programmed algorithm.
How does the video encourage viewers to engage with the content?
-The video encourages viewers to subscribe to the channel, like the video, and leave comments for further interaction.
Outlines
🛠️ Arduino Traffic Light Project Introduction
The video script introduces an Arduino project where the creator has ordered an Arduino kit to build a traffic light. The creator invites viewers to subscribe and like the channel if they find the content useful. The project involves using LEDs to simulate a traffic light with a sequence of red, yellow, and green lights, including a blinking green light. The script outlines the algorithm for the traffic light operation, which includes durations for each light state. The required components for the project are listed, such as three LEDs, jumper wires, resistors, a breadboard, and an Arduino Uno microcontroller. The script also describes the initial setup for the project, including connecting the LEDs to the Arduino pins.
🔌 Building the Traffic Light Circuit
This paragraph details the process of building the traffic light circuit. The LEDs are placed on the breadboard with their anodes on the right side. Resistors are connected to limit the current through the LEDs. The script explains the connections for the red, yellow, and green LEDs to the Arduino's digital pins 8, 10, and 12, respectively. The power supply is connected to the breadboard, and the script mentions checking the circuit for correctness. The video also includes a brief demonstration of the LEDs lighting up and switching off, indicating the successful setup of the circuit.
💻 Programming the Arduino for Traffic Light Operation
The final paragraph focuses on the coding aspect of the project. The script describes the process of writing and uploading the code to the Arduino. The code is written in C language, and the video creator mentions their experience with C and C++, suggesting that programming the Arduino was straightforward for them. The code involves setting the digital pins to high and low states to control the LEDs, following the traffic light sequence. The video concludes with a successful demonstration of the traffic light operation, including the blinking green light, and a reminder for viewers to subscribe to the channel and leave comments and likes.
Mindmap
Keywords
💡Arduino
💡Traffic Light
💡Algorithm
💡LED
💡Resistor
💡Breadboard
💡Microcontroller
💡Coding
💡Digital Write
💡Delay
💡Blink
Highlights
Introduction of the project to create a traffic light using an Arduino kit.
Request for viewers to subscribe and like the channel for more similar content.
Explanation of the algorithm for the traffic light's sequence: red, yellow, green, and blinking green.
Duration of each light's state: red for 3 seconds, yellow for 1 second, green for 3 seconds, and blinking green for 0.5 seconds three times.
List of components required for the project: LEDs, jumper wires, resistors, a breadboard, and an Arduino Uno microcontroller.
Description of the setup for the LEDs and resistors on the breadboard.
Coding setup using pin numbers 8, 10, and 12 for red, yellow, and green lights respectively.
Explanation of the loop function in the code for the traffic light sequence.
Demonstration of the code's logic for switching on and off the LEDs with specific delays.
Instructions on connecting the LEDs to the Arduino board and power supply.
Verification of the circuit connections using a power unit made of four cells.
Compilation and upload of the code to the Arduino board.
Observation of the traffic light functioning in real-time after code upload.
Emphasis on the simplicity of the project once the electronic and circuit parts are understood.
Comment on the ease of programming in C language for Arduino, especially for those familiar with C and C++.
Final request for viewers to subscribe, comment, and like the video for more content.
Transcripts
hey guys i hope you're doing well and as
i told you in my last video
i ordered a arduino kit for myself
or a br jacket and a simple traffic
light but
so as i'll show you how to make a
traffic light if you are also
so let's begin the project that we are
doing
is traffic lights
and i would just request if you haven't
subscribed to the channel
then please subscribe and like
in case you understand the video so
first of all i will discuss the
algorithm
algorithmic simple past
led red yellow and green
so we'll start with a red light
on red for
3 seconds then we will say on yellow
for one second then we'll say off
yellow and red
then we will say on
green light for
three seconds then we will off
green and then we will blink
the green light on green for say half
second
then again we will off the green light
again on green
for half second
of green
for half second
and again on green for
half second so hamara a pally will start
to a green
then first time blink here then second
time blink here
and then third time blinky and then we
will off all the lights so all this
duration is point five seconds
so it's quite simple
red yellow green
the three leds red yellow green we will
switch on this for three seconds
we will switch on this for one second
then both will be
off then green for three seconds
then 0.5 second blink
three times and if you talk about the
components that we require so just
writing the components
obviously three led
then we need jumper wire
male to male then resistors
i am taking 100 ohm so you need three
pieces of resistors
and the
breadboard i want to go solder less
and fifth our arduino
uno microcontroller
so these are the things that we require
so let's begin
the
you can see both the points they are
mail to mail
so this is all that we require and
obviously the breadboard to secure the
connections
update coding
and second is the loop component the
setup component may
i will use pin number 8 10 and 12
for red yellow and green and also all
these three pins will have a function of
output now coming to
the loop function so first of all the
algorithm says that we have to switch on
the red for three seconds so i'm writing
on port 8 a state of high that is 5
volts
with a delay of 3 seconds so it is 3 000
milliseconds
then i am writing a state of high on
port 10
that is yellow color high and for one
second
then i am switching off both so it is
digital right
digital right port 8 and 10 straight low
that is 0 volt
so this will switch off the red and the
yellow led
after that we have to switch on the
green led so
on the port 12 the state will become
high for
three seconds it will switch on the
green light
then we will switch off the green light
again
say port 12 and state low
and now the blinking part so i can
mention here
blink
so for the blinking it's
digital right first of all high state
it is off c so now we will switch it on
for half second
off for half second again on
for half second and again off
for half second and same with the third
loop
so this completes the coding part
and yes again i will request you to
subscribe to the channel
to receive such videos and now let's
make connections
and see how it will function
subsequently breadboard latex
red yellow and green
so i am placing all the three leds
red
yellow and the green one
so if you can see all the three leds are
placed and i have purposely
put the anode on the right side
now i need to fix resistors so
breadboard me sorry connections same
okay so these all are joined together
so i'll just use one and it will go till
the negative
so these two rails are for the power
supply
same for the yellow one
and now the green one
i hope you can see this
ground pin pin number 12 pin number 10
and pin number eight
also i am connecting three jumper wires
so yeah three connections
now generally a plus circuit pallet
checked out so i have this power unit
it's made
four cells in and all of them are like
one and half volts
so i am connecting the positive to the
positive and negative to the negative
just to verify
[Music]
subcore
green on port number 12
and your red hair was report number
eight
so these are the connections on the
arduino side
i have computer gaza we have inserted
that
and now we'll see
[Music]
leds will blink and they will switch off
and switch on code test kaneki
so this is the code
scope i'll go to the port and it is on
port 14 so let's see okay it's from
com13 so i'll put it on calm 14 because
13 kara issue per timer
now we'll see port com14 it's
automatically selected so we have
selected the right one
now i will compile the code
and it is saying that done compiling
everything is correct
and now we will upload the code
this thing uploading and done uploading
so now this is the code now i am
resetting the code once
this is the reset button
so red light wonderful for three seconds
now yellow fantastic and green
and it should blink now one two
three red for three seconds
one second and green
so you just saw that it's quite simple
once you understand
the electronic part and the circuit part
then it becomes quite easy and japori
programming its
programming in c language and i have
done lot of coding in c and c
plus plus so it was not an issue and
then coding
for them also it's quite easy so the
syntax is quite easy to understand that
digital write
and digital right because we are using
the digital pins
see digital and this is how the arduino
works
so please subscribe to the channel put
your comments
likes and bye
you
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