Raspberry Pi Pico for Radio Amateurs

Contents
Preface
Chapter 1 • Raspberry Pi Pico Hardware
	1.1 Overview
	1.2 Pico hardware module
	1.3 Comparison with the Arduino UNO
	1.4 Operating conditions and powering the Pico
	1.5 Pinout of the RP2040 microcontroller and Pico module
	1.6 Other RP2040 microcontroller-based boards
	1.6.1 Adafruit Feather RP2040
	1.6.2 Adafruit ItsyBitsy RP2040
	1.6.3 Pimoroni PicoSystem
	1.6.4 Arduino Nano RP2040 Connect
	1.6.5 SparkFun Thing Plus RP2040
	1.6.6 Pimoroni Pico Explorer Base
	1.6.7 SparkFun MicroMod  RP2040 Processor
	1.6.8 SparkFun Pro Micro RP2040
	1.6.9 Pico RGB Keypad Base
	1.6.10 Pico Omnibus
	1.6.11 Pimoroni Pico VGA Demo Base
	1.6.12 Tiny 2040
Chapter 2 • Raspberry Pi Pico Programming
	2.1 Overview
	2.2 Installing MicroPython on Pico
	2.2.1 Using a Raspberry Pi 4 to help install MicroPython on the Pico
	2.2.2 Using a PC (Windows 10) to help install MicroPython on Pico
Chapter 3 • Simple Programs – Software Only
	3.1 Overview
	3.2 Examples
	3.2.1 Average of two numbers read from the keyboard
	3.2.2 Average of 10 numbers read from the keyboard
	3.2.3 Surface area of a cylinder
	3.2.4 ºC to ºF conversion
	3.2.5 Surface area and volume of a cylinder – user function
	3.2.6 Table of squares of numbers
	3.2.7 Table of trigonometric sine
	3.2.8 Table of trigonometric sine, cosine and tangent
	3.2.9 Trigonometric function of a required angle
	3.2.10	Words in reverse order
	3.2.11 Calculator
	3.2.12 Dice
	3.2.13 Sorting lists
	3.2.14 File processing — writing
	3.2.15 File processing — reading
	3.2.16 Squares and cubes of numbers
	3.2.17 Multiplication timetable
	3.2.18 Odd or even?
	3.2.19 Binary, octal, and hexadecimal
	3.2.20 Add two matrices
	3.2.21 Shapes
Chapter 4 • Amateur Radio Programs — Software Only
	4.1 Overview
	4.2 Examples
	4.2.1  4-band resistor color code identifier
	4.2.2  4-band resistor color code identifier including small resistors
	4.2.3 Resistive potential divider
	4.2.4 Resistive attenuator design — equal source & load resistances
	4.2.5 Resistive attenuator design — unequal source & load resistances
	4.2.6 Zener diode based voltage regulator
	4.2.7 RC circuit frequency response
	4.2.8 Resonance in series RLC circuits
	4.2.9 Calculating the inductance of a single-layer coil
	4.2.10 Constructing a single-layer coil for required inductance
	4.2.11 Bipolar junction transistor (BJT) voltage divider biasing
	4.2.12	Designing a common-emitter BJT transistor amplifier circuit
	4.2.13 Designing active low-pass filters
	4.2.14 Quarter-wave vertical antenna length
	4.2.15 The '555' Monostable / bistable / astable chip
	4.2. Impedance matching
Chapter 5 • Simple Hardware-Based Projects
	5.1 Overview
	5.2 Project 1: Flashing the on-board LED
	5.3 Project 2: External flashing LED
	5.4 Project 3: Changing the LED flashing rate using pushbutton interrupts
	5.5 Project 4: Binary counting LEDs
	5.6 Using parallel LCDs
	5.7 Project 5: LCD functions — displaying text
	5.8 Project 6: Seconds counter – Parallel LCD
	5.9 Using I2C LCDs
	5.10 Project 7: Seconds counter with I2C LCD
Chapter 6 • Amateur Radio Hardware-based Projects
	6.1 Overview
	6.2 Project 1: Station mains On/Off power control
	6.3 Project 2: Station clock
	6.4 Project 3: Station temperature and humidity
	6.5 Project 4: Station geographical coordinates
	6.6 Waveform generation – using software
	6.6.1 Project 5: Generating a squarewave signal with amplitude under +3.3 V
	6.6.2 Project 6: Generating fixed voltages
	6.6.3 Project 7: Generating a sawtooth signal
	6.6.4 Project 8: Generating a triangular-wave signal
	6.6.5 Project 9: Arbitrary periodic waveform
	6.6.6 Project 10: Generating a sinewave signal
	6.6.7 Project 11: Generating an accurate sinewave signal using timer interrupts
	6.7 Waveform generation — using hardware
	6.7.1 Project 12: Fixed-frequency waveform generator
	6.7.2 Project 13: Generating waveforms with frequency-entry on keypad and LCD readout
	6.8 Project 14: Frequency counter
	6.9 Voltmeter – Ammeter – Ohmmeter – Capacitance meter
	6.9.1 Project 15: Voltmeter
	6.9.2 Project 16: Ammeter
	6.9.3 Project 17: Ohmmeter
	6.9.4 Project 18: Capacitance meter
	6.10 Project 19: RF power meter
	6.10.1 RF attenuators
	6.10.2 dB, dBm, and W?
	6.11 Project 20: Using the RadioStation Click board
	6.12 Morse Code exercisers
	6.12.1 Project 21: Characters entered by the user
	6.12.2 Project 22: Sending randomly generated characters
	6.12.3 Project 23: Setting Morse speed using an LCD and a rotary encoder
	6.13 Project 24: Relay sequencer with time delays
	6.14 Project 25: FM radio with the Raspberry Pi Pico
	6.14.1 Project 26: Modified FM Radio - increasing the output signal level – connecting a loudspeaker
	6.14.2 Project 27: FM radio using an LCD and external buttons
	6.14.3 Project 28: FM radio using an LCD and rotary encoder
	6.15 Project 29: Measure the frequency and duty cycle of a PWM waveform – screen display
	6.16 Project 30: Measure the frequency and duty cycle of a PWM waveform – LCD display
	6.17 Raspberry Pi Pico Bluetooth interface
	6.17.1 Project 31: Controlling an LED from a smartphone using Bluetooth
	6.18 Project 32: Station security
	6.19 Project 33: Generating accurate squarewave signals using the Raspberry Pi Pico State Machines
	6.20 Project 34: Using Wi-Fi with the Raspberry Pi Pico – Controlling an LED from a smartphone
	6.21 Project 35: Audio amplifier module with rotary encoder volume control
	6.22 Project 36: Morse decoder
	6.23 Raspberry Pi Pico RTL-SDR
	6.24 Project 37: Using the FS1000A 433 MHz transmitter/receiver pair
Chapter 7 • Running a Program Automatically after the Raspberry Pi Pico Boots
APPENDIX
	Parts Used in Projects
Index