Step 1 - Read schematics and build

Step 2 - Practice with schematics

Choose any two circuits and create them in Tinkercad.

How many circuits can you build from these schematics?

	When you press the button, the LED lights up.
	Turn the potentiometer to control the brightness of the LED.
	Press the button and the LED slowly lights up. Release the button and the LED slowly turns off.
	The tri-colour LED produces red, green, and blue colours when each button is pressed.

Engineers use breadboards to test if their circuits work because they can easily modify the circuits without damage.

Follow the Introducing the Breadboard tutorial from Tinkercad to learn how to connect components to a breadboard.

⭐CHALLENGE⭐ Add a breadboard and modify the circuits you created earlier in Tinkercad.

Step 3 - Simulate a blinking LED with 555 timer

Blinking lights have many uses in the real world.

Can you think of a few practical uses?
The 555 timer is an integrated circuit (IC).

ICs have markers (a dot and a notch) on their package to help you identify the pin numbers and position the ICs properly on the breadboard.

Pin 1 is the pin closest to the dot.

Here is the pinout of the 555 timer.

555 Timer
Recreate this blinking LED circuit with a 555 timer in Tinkercad.
Simulate the circuit.

Experiment by changing the values of the resistors and capacitors.
- What do you see?
- What do you think?
- What do you wonder?
Need help?
⭐CHALLENGE⭐ Add another LED to the circuit such that they blink alternately.

Need help?

Step 4 - Share and reflect

Share in class.
- Demonstrate the two circuits you created in Tinkercad.
- What was one thing you found challenging, and how did you overcome it?
Discuss in class.
- How might you slow the blinking LED in the 555 timer circuit?
- Where might the 555 timer be used in real life?