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Raspberry Pi DAC+ (formerly known as IQaudio DAC+) is a high-performance audio HAT designed for any Raspberry Pi with a 40-pin GPIO header. Equipped with the Texas Instruments PCM5122 DAC, it delivers crystal-clear stereo analogue audio through a pair of phono (RCA) connectors. No external power is needed – the DAC+ connects directly to the Raspberry Pi’s GPIO header without requiring soldering or cables. Features Power LED Analogue audio out (0-2 V RMS) via panel-mounted stereo phono (RCA) sockets with MUTE signal (headphone detect) Dedicated headphone amplifier, output via 3.5 mm panel-mounted barrel socket 40-pin pass-through GPIO header HAT EEPROM write-enabled Downloads Datasheet

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Multitasking and multiprocessing have become a very important topic in microcontroller-based systems, namely in complex commercial, domestic, and industrial automation applications. As the complexity of projects grows, more functionalities are demanded from the projects. Such projects require the use of multiple inter-related tasks running on the same system and sharing the available resources, such as the CPU, memory, and input-output ports. As a result of this, the importance of multitasking operations in microcontroller-based applications has grown steadily over the last few years. Many complex automation projects now make use of some form of a multitasking kernel. This book is project-based and its main aim is to teach the basic features of multitasking using the Python 3 programming language on Raspberry Pi. Many fully tested projects are provided in the book using the multitasking modules of Python. Each project is described fully and in detail. Complete program listings are given for each project. Readers should be able to use the projects as they are, or modify them to suit their own needs. The following Python multitasking modules have been described and used in the projects: Fork Thread Threading Subprocess Multiprocessing The book includes simple multitasking projects such as independently controlling multiple LEDs, to more complex multitasking projects such as on/off temperature control, traffic lights control, 2-digit, and 4-digit 7-segment LED event counter, reaction timer, stepper motor control, keypad based projects, car park controller, and many more. The fundamental multitasking concepts such as process synchronization, process communication, and memory sharing techniques have been described in projects concerning event flags, queues, semaphores, values, and so on.

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Build robust, intelligent machines that combine Raspberry Pi computing power with LEGO components. The Raspberry Pi Build HAT provides four connectors for LEGO Technic motors and sensors from the SPIKE Portfolio. The available sensors include a distance sensor, a color sensor, and a versatile force sensor. The angular motors come in a range of sizes and include integrated encoders that can be queried to find their position. The Build HAT fits all Raspberry Pi computers with a 40-pin GPIO header, including – with the addition of a ribbon cable or other extension device — Raspberry Pi 400. Connected LEGO Technic devices can easily be controlled in Python, alongside standard Raspberry Pi accessories such as a camera module. Features Controls up to 4 motors and sensors Powers the Raspberry Pi (when used with a suitable external PSU) Easy to use from Python on the Raspberry Pi

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The Raspberry Pi Pico 2 is a new microcontroller board from the Raspberry Pi Foundation, based on the RP2350. It features a higher core clock speed, double the on-chip SRAM, double the on-board flash memory, more powerful Arm cores, optional RISC-V cores, new security features, and upgraded interfacing capabilities. The Raspberry Pi Pico 2 offers a significant boost in performance and features while maintaining hardware and software compatibility with earlier members of the Raspberry Pi Pico series. The RP2350 provides a comprehensive security architecture built around Arm TrustZone for Cortex-M. It incorporates signed boot, 8 KB of antifuse OTP for key storage, SHA-256 acceleration, a hardware TRNG, and fast glitch detectors. The unique dual-core, dual-architecture capability of the RP2350 allows users to choose between a pair of industry-standard Arm Cortex-M33 cores and a pair of open-hardware Hazard3 RISC-V cores. Programmable in C/C++ and Python, and supported by detailed documentation, the Raspberry Pi Pico 2 is the ideal microcontroller board for both enthusiasts and professional developers. Specifications CPU Dual Arm Cortex-M33 or dual RISC-V Hazard3 processors @ 150 MHz Memory 520 KB on-chip SRAM; 4 MB on-board QSPI flash Interfaces 26 multi-purpose GPIO pins, including 4 that can be used for AD Peripherals 2x UART 2x SPI controllers 2x I²C controllers 24x PWM channels 1x USB 1.1 controller and PHY, with host and device support 12x PIO state machines Input power 1.8-5.5 V DC Dimensions 21 x 51 mm Downloads Datasheet (Pico 2) Datasheet (RP2350)

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Raspberry Pi Pico W is a microcontroller board based on the Raspberry Pi RP2040 microcontroller chip. The RP2040 microcontroller chip ('Raspberry Silicon') offers a dual-core ARM Cortex-M0+ processor (133 MHz), 256 KB RAM, 30 GPIO pins, and many other interface options. In addition, there is 2 MB of on-board QSPI flash memory for code and data storage. Raspberry Pi Pico W has been designed to be a low cost yet flexible development platform for RP2040 with a 2.4 GHz wireless interface using an Infineon CYW43439. The wireless interface is connected via SPI to the RP2040. Features of Pico W RP2040 microcontroller with 2 MB of flash memory On-board single-band 2.4 GHz wireless interfaces (802.11n) Micro USB B port for power and data (and for reprogramming the flash) 40 pin 21 x 51 mm 'DIP' style 1 mm thick PCB with 0.1' through-hole pins also with edge castellations Exposes 26 multi-function 3.3 V general purpose I/O (GPIO) 23 GPIO are digital-only, with three also being ADC capable Can be surface mounted as a module 3-pin ARM serial wire debug (SWD) port Simple yet highly flexible power supply architecture Various options for easily powering the unit from micro USB, external supplies or batteries High quality, low cost, high availability Comprehensive SDK, software examples and documentation Features of the RP2040 microcontroller Dual-core cortex M0+ at up to 133 MHz On-chip PLL allows variable core frequency 264 kByte multi-bank high performance SRAM External Quad-SPI Flash with eXecute In Place (XIP) and 16 kByte on-chip cache High performance full-crossbar bus fabric On-board USB1.1 (device or host) 30 multi-function general purpose I/O (four can be used for ADC) 1.8-3.3 V I/O voltage 12-bit 500 ksps analogue to digital converter (ADC) Various digital peripherals 2x UART, 2x I²C, 2x SPI, 16x PWM channels 1x timer with 4 alarms, 1x real time clock 2x programmable I/O (PIO) blocks, 8 state machines in total Flexible, user-programmable high-speed I/O Can emulate interfaces such as SD card and VGA Note: Raspberry Pi Pico W I/O voltage is fixed at 3.3 V. Downloads Datasheet Specifications of 3-pin Debug Connector

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The Raspberry Pi Zero W extends the Raspberry Pi Zero family. The Raspberry Pi Zero W has all the functionality of the original Raspberry Pi Zero, but comes with added connectivity consisting of: 802.11 b/g/n wireless LAN Bluetooth 4.1 Bluetooth Low Energy (BLE) Other Features 1 GHz, single-core CPU 512 MB RAM Mini HDMI and USB On-The-Go ports Micro-USB power HAT-compatible 40-pin header Composite video and reset headers CSI camera connector Downloads Mechanical Drawing Schematics

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Raspberry Pi Pico WH is a microcontroller board based on the Raspberry Pi RP2040 microcontroller chip. The RP2040 microcontroller chip ('Raspberry Silicon') offers a dual-core ARM Cortex-M0+ processor (133 MHz), 256 KB RAM, 30 GPIO pins, and many other interface options. In addition, there is 2 MB of on-board QSPI flash memory for code and data storage. Raspberry Pi Pico WH has been designed to be a low cost yet flexible development platform for RP2040 with a 2.4 GHz wireless interface using an Infineon CYW43439. The wireless interface is connected via SPI to the RP2040. Features of Pico WH RP2040 microcontroller with 2 MB of flash memory On-board single-band 2.4 GHz wireless interfaces (802.11n) Micro USB B port for power and data (and for reprogramming the flash) 40 pin 21 x 51 mm 'DIP' style 1 mm thick PCB with 0.1' through-hole pins also with edge castellations Exposes 26 multi-function 3.3 V general purpose I/O (GPIO) 23 GPIO are digital-only, with three also being ADC capable Can be surface mounted as a module 3-pin ARM serial wire debug (SWD) port Simple yet highly flexible power supply architecture Various options for easily powering the unit from micro USB, external supplies or batteries High quality, low cost, high availability Comprehensive SDK, software examples and documentation Pre-populated headers and 3-pin debug connector Features of the RP2040 microcontroller Dual-core cortex M0+ at up to 133 MHz On-chip PLL allows variable core frequency 264 kByte multi-bank high performance SRAM External Quad-SPI Flash with eXecute In Place (XIP) and 16 kByte on-chip cache High performance full-crossbar bus fabric On-board USB1.1 (device or host) 30 multi-function general purpose I/O (four can be used for ADC) 1.8-3.3 V I/O voltage 12-bit 500 ksps analogue to digital converter (ADC) Various digital peripherals 2x UART, 2x I²C, 2x SPI, 16x PWM channels 1x timer with 4 alarms, 1x real time clock 2x programmable I/O (PIO) blocks, 8 state machines in total Flexible, user-programmable high-speed I/O Can emulate interfaces such as SD card and VGA Note: Raspberry Pi Pico W I/O voltage is fixed at 3.3 V. Downloads Datasheet Specifications of 3-pin Debug Connector

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The Raspberry Pi Monitor is a 15.6-inch Full HD computer display. User-friendly, versatile, compact and affordable, it is the perfect desktop display companion for both Raspberry Pi computers and other devices. With built-in audio via two front-facing speakers, and VESA and screw mounting options as well as an integrated angle-adjustable stand, the Raspberry Pi Monitor is ideal for desktop use or for integration into projects and systems. It can be powered directly from a Raspberry Pi, or by a separate power supply. Features 15.6-inch full HD 1080p IPS display Integrated angle-adjustable stand Built-in audio via two front-facing speakers Audio out via 3.5 mm jack Full-size HDMI input VESA and screw mounting options Volume and brightness control buttons USB-C power cable Specifications Display Screen size: 15.6 inches, 16:9 ratio Panel type: IPS LCD with anti-glare coating Display resolution: 1920 x 1080 Color depth: 16.2M Brightness (typical): 250 nits Color gamut: 45% Viewing angle: 80° Power 1.5 A/5 V Can be powered directly from a Raspberry Pi USB port (max 60% brightness, 50% volume) or by a separate power supply (max 100% brightness, 100% volume) Connectivity Standard HDMI port (1.4 compliant) 3.5 mm stereo headphone jack USB-C (power in) Audio 2x 1.2 W integrated speakers Support for 44.1 kHz, 48 kHz, and 96 kHz sample rates Downloads Datasheet

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The Raspberry Pi PoE+ Injector adds Power-over-Ethernet (PoE) functionality to a single port of a non-PoE Ethernet switch, delivering both power and data through one Ethernet cable. It provides a plug-and-play, cost-effective solution for incrementally introducing PoE capability into existing Ethernet networks. The PoE+ Injector is a single-port, 30 W device suitable for powering equipment compliant with IEEE 802.3af and 802.3at standards, including all generations of Raspberry Pi PoE HATs. It supports network pass-through speeds of 10/100/1000 Mbps. Note: A separate IEC mains cable is required for operation (not included). Specifications Data rate 10/100/1000 Mbps Input voltage 100 to 240 V AC Output power 30 W Power output on pins 4/5 (+), 7/8 (–) Nominal output voltage 55 V DC Data connectors Shielded RJ-45, EIA 568A and 568B Power connector IEC c13 mains power input (not included) Storage humidity Maximum 95%, non-condensing Operating altitude –300 m to 3000 m Operating ambient temperature 10°C to +50°C Dimensions 159 x 51.8 x 33.5 mm Downloads Datasheet

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Program, build, and master over 60 projects with Python The Raspberry Pi 5 is the latest single-board computer from the Raspberry Pi Foundation. It can be used in many applications, such as in audio and video media centers, as a desktop computer, in industrial controllers, robotics, and in many domestic and commercial applications. In addition to the well-established features found in other Raspberry Pi computers, the Raspberry Pi 5 offers Wi-Fi and Bluetooth (classic and BLE), which makes it a perfect match for IoT as well as in remote and Internet-based control and monitoring applications. It is now possible to develop many real-time projects such as audio digital signal processing, real-time digital filtering, real-time digital control and monitoring, and many other real-time operations using this tiny powerhouse. The book starts with an introduction to the Raspberry Pi 5 computer and covers the important topics of accessing the computer locally and remotely. Use of the console language commands as well as accessing and using the desktop GUI are described with working examples. The remaining parts of the book cover many Raspberry Pi 5-based hardware projects using components and devices such as LEDs and buzzers LCDs Ultrasonic sensors Temperature and atmospheric pressure sensors The Sense HAT Camera modules Example projects are given using Wi-Fi and Bluetooth modules to send and receive data from smartphones and PCs, and sending real-time temperature and atmospheric pressure data to the cloud. All projects given in the book have been fully tested for correct operation. Only basic programming and electronics experience are required to follow the projects. Brief descriptions, block diagrams, detailed circuit diagrams, and full Python program listings are given for all projects described.

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The Raspberry Pi SSD Kit bundles a Raspberry Pi M.2 HAT+ with a Raspberry Pi NVMe SSD. It unlocks outstanding performance for I/O intensive applications on Raspberry Pi 5, including super-fast startup when booting from SSD. The Raspberry Pi SSD Kit is also available with 512 GB capacity. Features 40k IOPS (4 kB random reads) 70k IOPS (4 kB random writes) Conforms to the Raspberry Pi HAT+ specification Included 256 GB NVMe SSD M.2 HAT+ for Raspberry Pi 5 16 mm GPIO stacking header Mounting hardware kit (spacers, screws) Downloads Datasheet

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Develop innovative hardware-based projects in C The Raspberry Pi has traditionally been programmed using Python. Although this is a very powerful language, many programmers may not be familiar with it. C on the other hand is perhaps the most commonly used programming language and all embedded microcontrollers can be programmed using it. The C language is taught in most technical colleges and universities and almost all engineering students are familiar with using it with their projects. This book is about using the Raspberry Pi with C to develop a range of hardware-based projects. Two of the most popular C libraries, wiringPi and pigpio are used. The book starts with an introduction to C and most students and newcomers will find this chapter invaluable. Many projects are provided in the book, including using Wi-Fi and Bluetooth to establish communication with smartphones. Many sensor and hardware-based projects are included. Both wiringPi and pigpio libraries are used in all projects. Complete program listings are given with full explanations. All projects have been fully tested and work. The following hardware-based projects are provided in the book: Using sensors Using LCDs I²C and SPI buses Serial communication Multitasking External and timer interrupts Using Wi-Fi Webservers Communicating with smartphones Using Bluetooth Sending data to the cloud Program listings of all Raspberry Pi projects developed in this book are available on the Elektor website. Readers can download and use these programs in their projects. Alternatively, they can customize them to suit their applications.

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