Arduino Controlled Traffic Lights for Kids Without Delay()

Rotary potentiometer (generic)

Hot glue gun (generic)

Slide Switch

Arduino Nano R3

Soldering iron (generic)

5 mm LED: Green

5 mm LED: Red

5 mm LED: Yellow

Plier, Long Nose

Resistor 100 ohm

<h3 >Arduino Traffic Light Controller for Kids Toys</h3><p >Our kids love playing cars and trains, so we decided to make them a cool set of traffic lights out of cardboard and Arduino. We think these traffic lights are pretty awesome because of a few reasons:</p><ul ><li >We didn't use the 'delay()' function as a timer.</li></ul><ul ><li >We included a dial to change the green light time.</li></ul><ul ><li >Compact design running on 6AA batteries.</li></ul><ul ><li >Made from recycled materials.</li></ul><ul ><li >Very low cost to make.</li></ul><p ></p><div class="se-component se-video-container __se__float-none" contenteditable="false" style="width: 100%;"><figure style="width: 100%; height: 56.25%; padding-bottom: 56.25%; margin: 0px;"><iframe frameborder="0" allowfullscreen="" src="https://www.youtube.com/embed/2QN8tdJy3cE" data-proportion="true" data-percentage="100%,56.25%" data-size="100%,56.25%" data-align="none" style="width: 100%; height: 100%;" data-index="0" data-file-size="0" data-origin="100%,56.25%"></iframe><figcaption contenteditable="true"><div>Overview of this Arduino Project</div></figcaption></figure></div><p ></p><p >In our detailed post, we go into depth about how we made the traffic light controller, and explain our unique code and why we don't use the delay function. You can also download our Arduino Sketch so you can make your own traffic lights at home.</p><p ><a href="https://www.stemmayhem.com/arduino-controlled-traffic-lights-for-kids/">Full in Depth Guide &amp; Tutorial for Making Traffic Lights &gt;&gt;</a></p><figure><img src=https://projects.arduinocontent.cc/acad0292-5385-42a1-b56a-7ba26cac2b74.jpg /><figcaption> </figcaption></figure><h3 >Layout of Our Arduino Traffic Lights</h3><p >Here is the breadboard layout for this project. It really is quite simple. The only thing we didn't include was the on/off switch. (Sorry!) It is just an inline switch on the positive side of the battery.</p><figure><img src=https://projects.arduinocontent.cc/1cfda586-e5fe-4b15-9291-ac757e03b928.jpg /><figcaption> </figcaption></figure><p ></p>

4 Way Traffic Lights Without delay()

Fritzing Layout of Traffic Lights

Arduino Controlled Traffic Lights for Kids Without Delay()

The correct way to make traffic lights for a 4-way intersection.