The HiFiBerry DAC+ ADC is an analog-to-digital and a digital-to-analog converter for the Raspberry Pi. This unique sound card for the Raspberry Pi is optimized for one specific use case: the best audio playback quality.
Features
Stereo input and output
Dedicated 192 kHz / 24-bit high-quality Burr-Brown DAC
Dedicated 192 kHz / 24-bit high-quality Burr-Brown ADC
Hardware volume control for DAC. The output volume can be controlled using “alsamixer” or any application that supports ALSA mixer controls.
Connects directly onto the Raspberry Pi.
No soldering required.
Compatible with all Raspberry Pi models, that have a 40-pin GPIO connector
No additional power supply required.
Three ultra-low-noise linear voltage regulators.
HAT compliant, EEPROM for automatic configuration.
Gold plated RCA output connectors.
Includes 4 M 2.5 x 12 mm spacers.
Balanced/unbalanced input connector (P6)
The 5-pin connector can be used to connect a balanced input. Please note that the balanced input has to be selected with the jumpers and will always have a 12 dB gain. It shouldn't be used with line-level inputs.
Pin 1 is on the left.
right +
right –
GND
left –
left +
Output connector (P5)
The output connector realizes connections to external components like an amplifier.
Pin 1 is on the top left.
+5 V
1
2
R
GND
3
4
GND
+5 V
5
6
L
Input gain settings (J1)
The jumper block is responsible for the input configuration. It is recommended to use the default setting without additional input gain. 32 dB gain can be used to connect dynamic microphones.
Jumpers are numbered from top to bottom.
1
2
3
4
function
1
0
0
–
0 dB gain
0
1
1
–
12 dB gain
0
1
0
–
32 dB gain
0
0
1
–
balanced input, 12 dB gain
Specifications
Maximum input voltage: 2.1 Vrms - 4.2 Vrms for balanced input
Maximum output voltage: 2.1 Vrms
ADC signal-to-noise ratio: 110 dB
DAC signal-to-noise ratio: 112 dB
ADC THD+N: -93 dB
DAC THD+N: -93 dB
Input voltage for lowest distortions: 0.8 Vrms
Input gain (configurable with Jumpers): 0 dB, 12 dB, 32 dB
Power consumption: <0.3 W
Sample rates: 44.1 kHz - 192 kHz
In order to use the HiFiBerry DAC + ADC, your Raspberry Pi Linux kernel must be at least version 4.18.12.
Click here to learn how to update the Raspberry Pi kernel
Using microphones with the DAC+ ADC
The DAC+ ADC is equipped with a stereo analogue input that can be configured for a wide range of input voltages. It performs best with line-level analogue sources. However, it is also possible to use it as a microphone input.
You can only use dynamic microphones. Microphones that require a power supply are not supported.
The microphone output voltage is very low. This means you need to amplify it. The DAC+ ADC has the necessary pre-amplifier already equipped. You will have to set the jumpers correctly.
The sound from the input won’t be played back automatically on the output. You will have to use some software that reads the input and outputs it again.
Setting the correct input amplifier settings for a microphone
By default, the input sensitivity is matched for line-level audio sources. This is done via a jumper on the J1 header.
Audio input to output
There is no direct connection between the input and the output. That leads to the input from the connected microphone to not be played back automatically. If you want to hear it on the output, you need to use the command line tool alsaloop can be used for this.
The iCEBreaker FPGA board is an open-source educational FPGA development board.
The iCEBreaker is great for classes and workshops teaching the use of the open source FPGA design flow through Yosys, nextpnr, IceStorm, Icarus Verilog, Amaranth HDL and others. This means the board is low cost and has a nice set of features to allow for the design of interesting classes and workshop exercises. At the same time it allows the user to use the proprietary vendor tools if they choose to.
After the workshop the boards can be easily used as a development board as most GPIO are exposed, broken out and configurable through jumpers on the back of the board. There is only a minimal amount of buttons and LED that can't be disconnected and used for your own purposes.
Documentation
Workshop
Onboard each moto:bit are multiple I/O pins, as well as a vertical Qwiic connector, capable of hooking up servos, sensors and other circuits. At the flip of the switch, you can get your micro:bit moving! The moto:bit connects to the micro:bit via an updated SMD, edge connector at the top of the board, making setup easy. This creates a handy way to swap out micro:bits for programming while still providing reliable connections to all of the different pins on the micro:bit. We have also included a basic barrel jack on the moto:bit that is capable of providing power to anything you connect to the carrier board. Features More reliable Edge connector for easy use with the micro:bit Full H-Bridge for control of two motors Control servo motors Vertical Qwiic Connector I²C port for extending functionality Power and battery management onboard for the micro:bit
The LuckFox Pico Ultra is a compact single-board computer (SBC) powered by the Rockchip RV1106G3 chipset, designed for AI processing, multimedia, and low-power embedded applications.
It comes equipped with a built-in 1 TOPS NPU, making it ideal for edge AI workloads. With 256 MB RAM, 8 GB onboard eMMC storage, integrated WiFi, and support for the LuckFox PoE module, the board delivers both performance and versatility across a wide range of use cases.
Running Linux, the LuckFox Pico Ultra supports a variety of interfaces – including MIPI CSI, RGB LCD, GPIO, UART, SPI, I²C, and USB – providing a simple and efficient development platform for applications in smart home, industrial control, and IoT.
Specifications
Chip
Rockchip RV1106G3
Processor
Cortex-A7 1.2 GHz
Neural Network Processor (NPU)
1 TOPS, supports int4, int8, int16
Image Processor (ISP)
Max input 5M @30fps
Memory
256 MB DDR3L
WiFi + Bluetooth
2.4GHz WiFi-6 Bluetooth 5.2/BLE
Camera Interface
MIPI CSI 2-lane
DPI Interface
RGB666
PoE Interface
IEEE 802.3af PoE
Speaker interface
MX1.25 mm
USB
USB 2.0 Host/Device
GPIO
30 GPIO pins
Ethernet
10/100M Ethernet controller and embedded PHY
Default Storage Medium
eMMC (8 GB)
Included
1x LuckFox Pico Ultra W
1x LuckFox PoE module
1x IPX 2.4G 2 db antenna
1x USB-A to USB-C cable
1x Screws pack
Downloads
Wiki
Waveshare CoreEP4CE10 is an FPGA core board that features an EP4CE10F17C8N device onboard supporting further expansion.
Features
Onboard Serial Configuration Device EPCS16SI8N
Integrated FPGA basic circuit, such as clock circuit
Onboard nCONFIG button, RESET button, 4x LEDs
All the I/O ports are accessible on the pin headers
Onboard JTAG debugging/programming interface
2.00 mm header pitch design, suitable for being plugged-in your application system
Downloads
Wiki
The FRDM-MCXN947 is a compact and versatile development board designed for rapid prototyping with MCX N94 and N54 microcontrollers. It features industry-standard headers for easy access to the MCU's I/Os, integrated open-standard serial interfaces, external flash memory, and an onboard MCU-Link debugger.
Specifications
Microcontroller
MCX-N947 Dual Arm Cortex-M33 cores @ 150 MHz each with optimized performance efficiency, up to 2 MB dual-bank flash with optional full ECC RAM, External flash
Accelerators: Neural Processing Unit, PowerQuad, Smart DMA, etc.
Memory Expansion
*DNP Micro SD card socket
Connectivity
Ethernet Phy and connector
HS USB-C connectors
SPI/I²C/UART connector (PMOD/mikroBUS, DNP)
WiFi connector (PMOD/mikroBUS, DNP)
CAN-FD transceiver
Debug
On-board MCU-Link debugger with CMSIS-DAP
JTAG/SWD connector
Sensor
P3T1755 I³C/I²C Temp Sensor, Touch Pad
Expansion Options
Arduino Header (with FRDM expansion rows)
FRDM Header
FlexIO/LCD Header
SmartDMA/Camera Header
Pmod *DNP
mikroBUS
User Interface
RGB user LED, plus Reset, ISP, Wakeup buttons
Included
1x FRDM-MCXN947 Development Board
1x USB-C Cable
1x Quick Start Guide
Downloads
Datasheet
Block diagram
The Power Delivery Board uses a standalone controller to negotiate with the power adapters and switch to a higher voltage other than just 5V. This uses the same power adapter for different projects rather than relying on multiple power adapters to provide different output; it can deliver the board as part of SparkFun’s Qwiic connect system, so you won’t have to do any soldering to figure out how things are oriented.
The SparkFun Power Delivery Board takes advantage of the power delivery standard using a standalone controller from STMicroelectronics, the STUSB4500. The STUSB4500 is a USB power delivery controller that addresses sink devices. It implements a proprietary algorithm to negotiate a power delivery contract with a source (i.e. a power delivery wall wart or power adapter) without the need for an external microcontroller. However, you will need a microcontroller to configure the board. PDO profiles are configured in an integrated non-volatile memory. The controller does all the heavy lifting of power negotiation and provides an easy way to configure over I²C.
To configure the board, you will need an I²C bus. The Qwiic system makes it easy to connect the Power Delivery board to a microcontroller. Depending on your application, you can also connect to the I²C bus via the plated through SDA and SCL holes.
Features
Input and output voltage range of 5-20V
Output current up to 5A
Three configurable power delivery profiles
Auto-run Type-C™ and USB PD sink controller
Certified USB Type-C™ rev 1.2 and USB PD rev 2.0 (TID #1000133)
Integrated VBUS voltage monitoring
Integrated VBUS switch gate drivers (PMOS)
The SparkFun GPS-RTK2 raises the bar for high-precision GPS and is the latest in a line of powerful RTK boards featuring the ZED-F9P module from u-blox. The ZED-F9P is a top-of-the-line module for high accuracy GNSS and GPS location solutions, including RTK capable of 10 mm, three-dimensional accuracy. With this board, you will be able to know where your (or any object's) X, Y, and Z location is within roughly the width of your fingernail! The ZED-F9P is unique in that it is capable of both rover and base station operations. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins if you prefer to use a breadboard.
We've even included a rechargeable backup battery to keep the latest module configuration and satellite data available for up to two weeks. This battery helps 'warm-start' the module decreasing the time-to-first-fix dramatically. This module features a survey-in mode allowing the module to become a base station and produce RTCM 3.x correction data.
The number of configuration options of the ZED-F9P is incredible! Geofencing, variable I²C address, variable update rates, even the high precision RTK solution can be increased to 20 Hz. The GPS-RTK2 even has five communications ports which are all active simultaneously: USB-C (which enumerates as a COM port), UART1 (with 3.3 V TTL), UART2 for RTCM reception (with 3.3V TTL), I²C (via the two Qwiic connectors or broken out pins), and SPI.
Sparkfun has also written an extensive Arduino library for u-blox modules to easily read and control the GPS-RTK2 over the Qwiic Connect System. Leave NMEA behind! Start using a much lighter weight binary interface and give your microcontroller (and its one serial port) a break. The SparkFun Arduino library shows how to read latitude, longitude, even heading and speed over I²C without the need for constant serial polling.
Features
Concurrent reception of GPS, GLONASS, Galileo and BeiDou
Receives both L1C/A and L2C bands
Voltage: 5 V or 3.3 V, but all logic is 3.3 V
Current: 68 mA - 130 mA (varies with constellations and tracking state)
Time to First Fix: 25 s (cold), 2 s (hot)
Max Navigation Rate:
PVT (basic location over UBX binary protocol) - 25 Hz
RTK - 20 Hz
Raw - 25 Hz
Horizontal Position Accuracy:
2.5 m without RTK
0.010 m with RTK
Max Altitude: 50k m
Max Velocity: 500 m/s
2x Qwiic Connectors
Dimensions: 43.5 x 43.2 mm
Weight: 6.8 g
When you experiment with the Raspberry Pi on a regular basis and you connect a variety of external hardware to the GPIO port via the header you may well have caused some damage in the past. The Elektor Raspberry Pi Buffer Board is there to prevent this! The board is compatible with Raspberry Pi Zero, Zero 2 (W), 3, 4, 5, 400 and 500.
All 26 GPIOs are buffered with bi-directional voltage translators to protect the Raspberry Pi when experimenting with new circuits. The PCB is intended to be inserted in the back of Raspberry Pi 400/500. The connector to connect to the Raspberry Pi is a right angled 40-way receptacle (2x20). The PCB is only a fraction wider. A 40-way flat cable with appropriate 2x20 headers can be connected to the buffer output header to experiment for instance with a circuit on a breadboard or PCB.
The circuit uses 4x TXS0108E ICs by Texas Instruments. The PCB can also be put upright on a Raspberry Pi.
Downloads
Schematics
Layout
SwiftIO offers a full Swift compiler and framework environment that runs on the microcontroller. The SwiftIO board is a compact electronic circuit board that runs Swift on the bare metal, giving you a system that can be used to control all kinds of electronic projects.
Features
NXP i.MX RT1052 Crossover Processor with ARM Cortex-M7 core @ 600 MHz
8 MB SPI Flash, 32 MB SDRAM
On-board DAPLink debugger
On-board USB to UART for serial communication
On-board RGB LED
On-board SD socket
46x GPIO, 12x ADC, 14x PWM, 4x UART, 2x I²C, 2x SPI etc.
Many additional advanced features to meet the needs of advanced users
Zephyr RTOS support
MadMachine IDE is the premier integrated development environment for SwiftIO, which makes it easy to write Swift code and download it to the board.
The ATmega328 Uno Development Board (Arduino Uno compatible) is a microcontroller board based on the ATmega328.
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header and a reset button.
It contains everything needed to support the microcontroller; connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
Specifications
Microcontroller
ATmega328
Operating voltage
5 V DC
Input voltage (recommended)
7-12 V DC
Input voltage (limits)
6-20 V DC
Digital I/O pins
14 (of which 6 provide PWM output)
Analogue input pins
6
SRAM
2 kB (ATmega328)
EEPROM
1 kB (ATmega328)
Flash memory
32 kB (ATmega328) of which 0.5 kB used by bootloader
Clock speed
16 MHz
Downloads
Manual
