Summary

We have learned how to build a fully functional traffic lights system with pedestrian lights controlled by a button. We achieved this by building each part of the project separately and assembling it all together at the end.

We learned how to use breadboards, how the color codes on resistors work, why we use resistors when controlling LEDs, and how external LEDs are assembled. Also, we learned how to use push buttons, how to prevent floating signals using pullup resistors, and how to utilize goroutines in TinyGo.

In the next chapter, we are going to learn how to read input from a 4x4 keypad and how to control a servo motor. We are going to utilize this knowledge to build a safety lock that opens when the correct passcode is entered.