Arduino project · LEDs and lights · Medium
Pedestrian Crossing with Beeper
Cars have green. When a pedestrian presses the button, cars get red, pedestrians get green and the beeper helps blind users.
What you will learn
- How to design a safe crossing sequence
- Why the beeper matters for people who cannot see the light
- How "wait until" starts the sequence
How it works
LED1 is the car green, LED2 the car red and LED3 the pedestrian green. After the button press the car light stops, the pedestrian light starts and the buzzer beeps three times. After 3 seconds it returns to normal.
Try this next
- Add a yellow car light before the red.
- Make the beeps faster at the end.
- Add a second pedestrian button on the other side.
The simulator program and explanation on this page are original. The idea follows a classic Arduino project that students have built for years.
Parts: sensors and actuators (tap to show or hide)
Try the inputs (virtual sensors)
Pins (you can change them)
| Part | Arduino pin (change it here) | How to wire it |
|---|
Every wire, one by one
Red rail = 5 V from the Arduino 5V pin. Black rail = GND. The coloured wires carry signals. Match the wire colours on the drawing to this list.
| # | Colour | From (part and leg) | To |
|---|
Steps run from top to bottom, then start again. While the simulation runs, the active step is highlighted in green.
Quantities come from the parts you added. The store links open a search for that item on Robu.in, Amazon.in and ThinkRobotics, so you always see what is in stock today. Check the model, voltage and price before you order.
| # | Item | Qty | Search term | Buy / compare |
|---|
The PDF has the circuit sketch, pin table, every wire, sequence, full code, the parts list with store links, do’s and don’ts for each part, and the safety notes. The project file lets you come back and keep editing.
In the real world
A pedestrian crossing
Press the button. The traffic light turns red, the beeper sounds and people cross.
Tip: use the gold tab at the bottom of the circuit drawing to pull the real-world view up over the Arduino board. Your parts stay visible above it, so you can press a button and watch the real scene react.
- Button = the pedestrian request
- LEDs = traffic and walk lights
- Buzzer = crossing beeper