Project 1.4 & 1.5 Companion

Project 1.4 & 1.5 Checklist

Name: Period: Date:

Check off each box as you finish that step. The back is a quick reference for the syntax, not the challenges themselves, you still have to figure those out.

Project 1.4: Blinking and Counting

Step	✓
Onboard LED blinks, from a saved script
One of my own wired LEDs blinks (pin used: )
Challenge: leds.py saved with a working unarycount(leds, delay) function
Challenge: binarycount(leds, delay) added to leds.py

Project 1.5: Fading with PWM

Step	✓
Tried duty_u16() at 0, 32768, and 65535 in the REPL
Challenge: breathe1(led) added to leds.py
Challenge: breatheall(leds) added to leds.py

Quick reference

Syntax only. The challenges above are still yours to work out: this page won’t do the converting or the looping for you.

Project 1.4

Making an output pin: machine.Pin(13, machine.Pin.OUT)
Unary: light as many LEDs as the count, no place value.
Place values for 3 LEDs in binary: 4, 2, 1. Any number 0-7 is some combination of those three, on or off.
% (modulo) gives the remainder after dividing by something.
// (floor division) divides by something and throws away the remainder.
Save both challenges in one file, leds.py: unarycount(leds, delay=1) and binarycount(leds, delay=1). Exact names: later projects import this file.

Project 1.5

Making a PWM pin: machine.PWM(machine.Pin(13))
Setting its frequency: led.freq(1000)
Setting brightness: led.duty_u16(value), from 0 (off) to 65535 (fully on)
range(start, stop, step) can step by more than 1, and count backward with a negative step
Add both challenges to the same leds.py from Project 1.4: breathe1(led) and breatheall(leds). Exact names: later projects import this file.