Pico
Using the Pi Pico with an L298N module to control a 12V motor (Jul 2025)The L298N is a convenient and inexpensive H-bridge motor controller, which interfaces nicely with the Pi Pico.
Categories: electronics, embedded computing, Pico
Why using crude PWM for sampled audio output on the Raspberry Pi Pico doesn't sound that great (Jul 2025)We can play sampled audio from a Pi Pico, using the built-in PWM controller, a single GPIO pin, and a handful of discrete electronic components. It's cheap and simple -- but how well does it work?
Categories: embedded computing, Pico
Raspberry Pi Pico: loading code into RAM and running it -- part 1 (Jun 2025)This is the first of (at least) two articles on loading and running arbitrary executable code into RAM on the Pico, and running it.
Categories: C, embedded computing, Pico
Some thoughts on Pimoroni's Pico GFX Pack LCD module (Mar 2025)Pimoroni's 'GFX Pack' is an inexpensive, low-power LCD display, with modest resolution. This article describes my experience using and programming it.
Categories: Raspberry Pi, embedded computing, Pico
Using flash memory as non-volatile storage on the Pi Pico microcontroller (Jun 2023)The Pi Pico is an impressive microcontroller for its size and cost, but it lacks specific non-volatile memory. This article explains how to use the program flash ROM for that purpose.
Categories: software development, C, Linux, embedded computing, Pico
pico-photo-clock: an easy-to-construct Pi Pico desktop photo clock (Jan 2023)This article describes how to construct a desktop photo clock using a Raspberry Pi Pico and some solder-free peripherals.
Categories: embedded computing, Pico
Using the Maxim DS3231 I2C real-time clock in C on the Raspberry Pi Pico (Jan 2023)The Maxim DS3231 I2C real-time clock is a reasonably accurate, inexpensive device, that is easy to interface to the Raspberry Pi Pico.
Categories: C, embedded computing, Pico
Using ImageMagick to generate anti-aliased bitmap fonts for a microcontroller's LCD display (Jan 2023)This article describes how to generate and use compressed, anti-aliased font data, for use in a microcontroller application.
Categories: C, Linux, embedded computing, Pico
The Pi Pico, two years on (Jan 2023)I've been using the Raspberry Pi Pico for embedded projects for the last two years or so. What do I think of it now?
Categories: embedded computing, Pico
Some thoughts on the Waveshare 3.5-inch LCD/SD module for the Raspberry Pi Pico (Jan 2023)This is a versatile touchscreen display module with a strikingly low cost. But is it any good?
Categories: embedded computing, Pico
Raspberry Pi Pico: loading code into RAM and running it -- part 2 (Dec 2022)This is the second of (at least) two articles on loading and running arbitrary executable code into RAM on the Pico, and running it.
Categories: C, embedded computing, Pico
Some thoughts on using a USB keyboard with the Raspberry Pi Pico (Nov 2022)The Pi Pico has USB host support, and can work with a USB keyboard. Although there are some programming examples, the general approach to programming USB host operations is not well documented.
Categories: software development, C, embedded computing, Pico
Making an 8x32 LED auxiliary display with a USB interface, from an LED matrix and a Raspberry Pi pico (Nov 2021)A specific application of the Pico7219 library that I described in an earlier article.
Categories: embedded computing, Pico, electronics
Running CP/M on the Raspberry Pi Pico microcontroller (May 2021)This article introduces CPICOM -- an emulator for CP/M 2.2 on the Raspberry Pi microcontroller.
Categories: retrocomputing, Pico, C, Z80
Why you can sometimes connect 3.3V and 5V I2C devices (and probably shouldn't) (May 2021)On websites, and in hobbyist kits for Raspberry Pi and Arduino, you'll often see I2C devices connected that have different supply voltages. This is (usually) safe and, in non-critical applications, tends to work. But why?
Categories: Raspberry Pi, electronics, embedded computing, Pico
Controlling a chain of MAX7219 LED matrices using C on a Raspberry Pi Pico (May 2021)The MAX7219 IC is widely used to control an 8x8 matrix of LED, but they can be chained to create much larger displays. This article describes how the chaining works, and how to create a driver for the Raspberry Pi Pico.
Categories: software development, C, embedded computing, Pico
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