Video tutorials

When you need a loud, straightforward alert for a project, like a timer, a security alarm, or a button-press confirmation, you don't always need complex music or variable tones. Active buzzers are simple "plug-and-play" components. Give them power, and they instantly make noise, saving you code and wiring hassle.

In this quick tutorial, you'll discover:

• What an active electronic buzzer is and how it differs from a passive one.

• How to identify the anode (+) and cathode (-) pins.

• How to wire and trigger an active buzzer using simple DC power or a microcontroller.

This tutorial covers the fundamentals of LEDs: how they function, how to identify their terminals, and how to safely power them without damaging the component.

Understanding LEDs is essential because they are the standard light source in modern electronics. Used in phones, monitors, custom PC builds, and basic microcontrollers like Arduino or ESP32.

Push buttons allow users to interact with electronic circuits. Whether you are building an Arduino project, a game controller, or a custom gadget, you need these buttons to trigger actions, start programs, or change settings.

What you will learn:

1. What a tactile push button is.

2. How the 4 pins connect internally.

3. How to place the button correctly on a breadboard.

A breadboard is your best friend for prototyping. It lets you test circuits safely, make mistakes, pull wires right back out, and try again in seconds, all without needing any special tools.

In this tutorial, you will learn:

• What a breadboard actually is and why it has that weird name.

• How the secret hidden connections work underneath the plastic.

• How the rows and columns are marked so you never plug a wire into the wrong spot.

Here’s a list of all the parts you need to build the DIY Rotating LED Clock Display. Each part links to Amazon. If a link doesn’t work, don’t worry - we’ve also added tips on how to find a replacement.

Thoughtful design creates harmony between humans and the natural world. Modify the building to create homes for wildlife, restore soil health, and bring natural light to green spaces.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

A thriving rainforest relies on its plant diversity. Place the seeds your team has collected in the soil and watch as they take root.

Keystone species bring balance to their ecosystem and shape the forest around them. Your team must build and deliver a keystone species to this newly protected habitat.

Once a towering giant, this aging tree now bends beneath its own weight. Add a support to stabilize the tree for years to come.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Roots help to tell the long history of the rainforest. Open the root window and document what you see.

Researchers must work carefully when exploring protected ecosystems. Move through the area without damaging these tiny creature’s homes.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Olivia and Michael are studying species that live the rainforest canopy with the help of their forest guide. Help the team deploy equipment to monitor activity high above the forest floor.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Climbing vines have wrapped tightly around this tree. Gently untangle them so the tree has space and sunlight to grow again.

Mycelium is the vast, underground network of fungus beneath the rainforest floor. Form a new connection between the mycelium and a neighboring tree root.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Leafcutter ants work together to feed an underground fungus garden. Guide the ants back to their nest – but move too quickly, and you may scatter the leaves they collected.

Rainforest plants stretch their roots far and wide, reaching resources and forming connections with nearby organisms. Help this plant cross the forest boundary in search of symbiosis.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Hidden in plain sight, the katydid camouflages with its leafy surroundings. Collect as many leaves as you can without disturbing this master of disguise.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

Many creatures thrive just below the surface. Flip the rock to discover what’s living underneath but leave no trace by placing it back the way you found it.

Some trees use a unique strategy to disperse their seeds. Release the seeds from the seed pod, propelling them to new ground.

High above the canopy, drones survey the landscape and transmit data back in real time. Help the pilot launch the drone to create a LiDAR map of this rainforest ecosystem.

No Equipment Constraint: A mission model cannot earn points if it is touching equipment at the end of the match.

In this tutorial, we explore the Scratch program used with the Smaller Pancake box robot for our solutions in the FIRST LEGO League 2025–2026 UNEARTHED competition.

Short, direct, and almost identical every time. This 10 out of 10 tutorial from the FIRST LEGO League 2025-2026 UNEARTHED competition puts the Smaller Pancake box robot and the Site Marking attachment through ten flag deliveries for Mission 15.

Sometimes the best final run is the one that does exactly one job. In this FLL 2025 UNEARTHED competition tutorial, the Smaller Pancake box robot uses the Site Marking attachment to carry the flag straight from base to its destination in under ten seconds.

When the attachment is simple, preparation makes all the difference. In this 10 out of 10 tutorial for the FIRST LEGO League 2025–2026 UNEARTHED competition, the Smaller Pancake box robot and the Forum attachment deliver the collected artifacts to Mission 14: Forum across ten consecutive attempts.

Sometimes the most effective solutions are also the most straightforward. In Mission 14: Forum from the FIRST LEGO League UNEARTHED season, the Smaller Pancake box robot uses a lightweight pinless attachment to deliver the collected artifacts safely into the scoring area.

Long runs are an excellent test of consistency. In this ten-attempt tutorial from the FIRST LEGO League 2025–2026 UNEARTHED competition, we put the Smaller Pancake box robot and the M14 and M15 transport attachment through one of the longest runs on the field.

This run asks the robot to think several missions ahead. In the FLL 2025 UNEARTHED competition, the Smaller Pancake box robot crosses almost the entire field with a multi-purpose M14 and M15 attachment, places the Mission 15: Site Marking flag, collects the opposing team's minecart, and brings it with previously collected artifacts to the left base for Mission 14: Forum.