ZSWatch open-source hardware nRF52833 smartwatch runs Zephyr RTOS

ZSWatch open-source hardware nRF52833 smartwatch

ZSWatch is an open-source hardware smartwatch based on an u-Blox ANNA-B402 module with Nordic Semi nRF52833 Bluetooth 5.1 SoC and running Zephyr real-time operating systems. We’ve seen several open-source hardware smartwatches over the years, as well as open-source firmware projects such as AsteroidOS or InfiniTime with the latter used in the PineTime smartwatch, and the ZSWatch adds to the list of interesting open-source wearables with all source files made public. ZSWatch specifications: Wireless module – u-blox ANNA-B402 based on Nordic Semi nRF52833 Arm Cortex-M4F microcontroller with Bluetooth LE 5.1 and direction finding support Storage – 8MB flash (MX25R6435FZNIL0) Display – 1.28-inch 240×240 IPS TFT circular display with GC9A01 driver; covered with Sapphire Crystal Glass. Sensors Accelerometer (LIS2DS12TR) for step counting, etc… MAX30101EFD for pulse oximetry and heart rate monitoring Misc 3x buttons for navigation (prev, next, enter) Vibration motor (DRV2603RUNT) with haptics driver to give better vibration control. Power Management […]

Merlot is an open-source hardware tricolor wireless E-paper display

Merlot tricolor 4.2 inch epaper display

paperd.ink Merlot is a tricolor E-paper display with an open-source hardware control board based on ESP32 wireless SoC that is programmable with Arduino, MicroPython, or the ESP-IDF framework. We first wrote about the paperd.ink 4.2-inch ESP32-based monochrome e-Paper display last year, but the company has now refined its design with the “paperd.ink Classic” replacing the 3D printed enclosure with a vacuum cast enclosure and adding a 1,900 mAh battery. They also launched a new model, the Merlot, based on the same design but with a display supporting three colors: black, white, and red. Merlot specifications: Wireless module – ESP32-WROOM-32 module with ESP32 dual-core processor, 4 MB SPI flash, 2.4 GHz WiFi 4 & Bluetooth LE connectivity Storage – MicroSD card slot for storing images, files, etc Display – 4.2″ tricolor e-Paper display with 400 x 300 resolution; full refresh: ~ 17 seconds; partial update: also 17 seconds… USB – 1x […]

Olimex AgonLight2 8-bit open-source hardware computer sells for 50 Euros


Olimex has started to take pre-orders for the AgonLight2, a customized version of the Agon Light 8-bit open-source hardware computer based on the Z80 family and running BBC Basic. Bernardo Kastrup and Dean Belfield created the Agon light 8-bit retro computer with VGA and PS2 keyboard port and programmable with BASIC earlier this year and released all hardware design files, the firmware, and documentation on GitHub, and Dean uploaded a one-hour-long video on YouTube. It was designed with EasyEDA, but Olimex re-captured the design in KiCad after getting customer requests, and the new cost-optimized board named AgonLight2 will start shipping by the end of January 2023. AgonLight2 specifications: MCU – Zilog eZ80F92 8-bit microcontroller @ 18.423 MHz with 128 KB flash, 256 bytes configuration Flash memory, 8 KB SRAM (See PDF datasheet for details) System Memory – 512KB, 10ns, parallel SRAM Storage – MicroSD card socket Terminal subsystem MCU – […]

TinyLlama x86 retro computer uses the Raspberry Pi Zero 2 W as a MIDI synthesizer

TinyLlama x86 retro computer

The TinyLlama x86 retro computer board is designed to run DOS games on a DM&P Vortex86EX 32-bit x86 processor and integrates a MIDI synthesizer based on Raspberry Pi Zero 2 running MT32-Pi firmware. Growing up playing games on 386/486-era computers, Eivind Bohler looked for similar recent hardware to play DOS games and after discovering the 86Duino x86 Arduino-compatible board, he decided to use the SOM-128-EX module powering the board to create the TinyLlama board with a Sound Blaster Pro-compatible Crystal CS4237B sound chip and a MIDI synthesizer. TinyLlama specifications: D&MP SOM-128-EX system-on-module with Processor – DM&P Vortex86EX 32-bit x86 processor @ 60 to 500 MHz System Memory – 128MB DDR3 Storage – 8MB SPI flash Storage – MicroSD card socket Video Output – VGA up to 1024×768 @ 60 Hz using the Vortex86VGA module running off an x1 PCI-e lane Audio Crystal CS4237B all-in-one audio chip MIDI synthesizer with Raspberry Pi […]

Starfish PnP machine control board combines Raspberry Pi RP2040 MCU with TMC2209 motor drivers

StarFish Raspberry Pi RP2040 PnP control board

We’ve already seen the Raspberry Pi RP2040 MCU in a 3D printer controller board, so it should come as no surprise that the dual-core microcontroller also found its way into a Pick-and-Place (PnP) machine control board. Designed by Thea Flowers, the Starfish board leverages the RP2040 MCU capabilities to control three Trinamic TMC2209 motor drivers, MOSFET drivers to control DC vacuum pumps, two vacuum sensors, and offer RS485 and I2C connectivity for feeders and peripherals respectively. Starfish specifications: MCU – Raspberry Pi RP2040 dual-core Cortex M0+ microcontroller at up to 133 MHz with 264 kB of embedded SRAM Storage – QSPI flash Motor drivers – 3x TMC2209 drivers for X, Y1, and Y2 MOSFETs – 2x MOSFETs to control the 2x vacuum pumps Valve drivers – 2x TI DRV120 single-channel relay, solenoid, and valve drivers to control two pneumatic solenoid valves Sensors – 2x CFSensor XGZP6857D I2C pressure sensor modules […]

Miniature Raspberry Pi CM4 carrier board only exposes USB-C port and 40-pin GPIO header

Miniature Raspberry Pi CM4 carrier board

Mirek Folejewski’s (aka Mirko Electronics) PicoBerry is an open-source hardware, miniature Raspberry Pi CM4 carrier board with just a USB Type-C port for power, a 40-pin Raspberry Pi GPIO header, and barely anything else. At just 70x20mm, the 2-layer board only adds a few LEDs, namely the ACT/PWR LEDS and two user LEDs, and supports any Raspberry Pi CM4 module with eMMC flash, but not the Raspberry Pi CM4 Lite since the board does not include a microSD card slot. PicoBerry specifications: Supported system-on-modules – Raspberry Pi CM4 with eMMC flash, and possibly compatible SoMs such as Radxa CM5 or Pine64 SoQuartz64 USB – USB Type-C for power Expansion – 40-pin GPIO header with the same layout as on Raspberry Pi 4 or other Pi boards with a 40-pin header Misc – ACT/PWR LEDs, 2x user LEDs (green.red) Power Supply  – 5V DC/3A via USB-C port, Dimensions – 70x20mm (2-layer […]

ICE-V Wireless FPGA board combines Lattice Semi iCE40 UltraPlus with WiFi & BLE module

ICE-V Wireless board

Lattice Semi ICE40 boards are pretty popular notably thanks to the availability of open-source tools. ICE-V Wireless is another ICE40 UltraPlus FPGA board that also adds wireless support through an ESP32-C3-MINI-1 module with WiFi 4 and Bluetooth LE connectivity. Designed by QWERTY Embedded Design, the board also comes with 8MB PSRAM, offers three PMOD expansion connectors, plus a header for GPIOs, and supports power from USB or a LiPo battery (charging circuit included). ICE-V Wireless specifications: FPGA – Lattice Semi ICE40UP5K-SG48 FPGA with 5280 LUTs, 120 Kbits EBR RAM, 1024 Kbits PSRAM External RAM – 8MB PSRAM Wireless – ESP32-C3-MINI-1 module with 2.4 GHz WiFi 4 and Bluetooth LE through ESP32-C3 RISC-V processor, 4MB flash. USB – 1x USB Type-C port for power, programming, and JTAG debugging of the ESP32-C3 module Expansions 3x PMOD connectors connected to the FPGA I/O connector with 7x ESP32-C3 GPIO lines (serial, ADC, I2C) and […]

ShaRPiKeebo handheld Linux computer based on Raspberry Pi Zero (2) W ships with a LoRa radio (Crowdfunding)

Raspberry Pi Zero portable Linux computer with LoRa

Morpheans ShaRPiKeebo is a portable Linux computer based on Raspberry Pi Zero W or Zero 2 W SBC that reminds me of the Allwinner R8 powered PocketCHIP handheld computer that was introduced in 2016, and was quite popular (for a niche product) at the time. The ShaRPiKeebo comes with a physical QWERTY keyboard, a daylight-readable screen, and Wi-Fi & Bluetooth connectivity, but also adds a 433 MHz LoRa radio that should make it usable as an off-the-grid communicator. Just like PocketCHIP, the ShaRPiKeebo can be used for system administration, retro-gaming, pen testing, STEM education, and all sort of maker projects. ShaRPiKeebo specifications: Supported SBCs via 40-pin GPIO header – Raspberry Pi Zero W, Raspberry Pi Zero 2 W, and (maybe) compatible SBCs like Radxa Zero or Banana Pi M2 Zero Display – 2.7- inch SHARP memory display (LS027B7DH01) with 400×240 resolution, low-latency, low-power Connectivity 802.11 b/g/n WiFi 4, Bluetooth 4.2 […]

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