MangoPi-Nezha MQ is an open source RISC-V development board that integrates Wi-Fi connectivity and dual USB Type-C ports into a tiny (4x4 cm) package. Equipped with Allwinner D1s chip, it supports rich display interfaces such as RGB, DSI, and LVDS. It also includes an onboard silicon microphone and Class D amplifier for audio output.
Halo TD-XPAH is the first open source hardware IEEE 802.11ah Wi-Fi development platform available to creators, manufacturers, engineers and experimenters. The IEEE 802.11ah Wi-Fi protocol builds on Wi-Fi 6, adding the ability to reach at least one kilometer (half a mile) from the access point to the client. 802.11ah is designed to support up to hundreds of clients per access point through restricted access windows, a form of time division multiple access (TDMA). It also supports 802.11s mesh networking, where remote nodes can link to and hop between nodes closer to home to further extend range.
The SOCORAD32, also known as the ESP32 Software Controlled Radio, is a professional grade hackable radio for amateur radio exploration, voice and data communications using simple AT commands. Just add a speaker and batteries and you've got a fully functional walkie-talkie. With a dedicated Push-to-Talk (PTT) button onboard, SOCORAD32 works right out of the box without touching a line of code!
The ESP32 audio development board is a rich audio development platform based on the powerful ESP32 chip. It has a rich set of peripherals that can open up a wide variety of user interactions. It is portable and has onboard battery management. It is compact and can fit into almost any enclosure. It's even wearable! Software examples allow quick start and easy adaptation to existing projects. The ESP32 audio development board will be available in a full-featured touch screen version and a portable mini version.
ShaRPiKeebo is probably the smallest Linux computer you can find with a physical QWERTY keyboard. Measuring just 6 x 11 x 1.5 cm, it's powered by a Raspberry Pi (RPi) Zero W or 2W and features a 400x240 pixel, low-power, daylight-readable, black-and-white SHARP memory display and long-range wireless transceiver.
RoenDi is a visually adaptable rotary encoder capable of displaying custom graphics. Unlike any other encoder we've seen, there's a built-in screen that provides visual feedback. RoenDi is designed with simplicity and versatility in mind. Just connect the MicroUSB cable or ST-LINK connector, upload the code to the MCU, and you're ready to go!
AquaPing is an ultra-low power smart sensor that provides isolated water leak detection, even behind walls.
BeanCounter is a pocket-friendly SMT parts counter. Powered by a CR2032 coin cell battery, it uses two infrared photointerrupters to count parts as quickly as possible. It works with any opaque, 8 mm wide carrier tape up to 2 mm, and it covers most 0805 or smaller LEDs and passives, as well as SOT23 transistors.
ANT BBPS displays voltage, current and power on an OLED display. It features digitally controlled current limit, wide input voltage range and up to 12 V DC output. It also has two input connections, a USB type-C connector and a screw terminal. A USB input means a battery pack can easily be used as your power source, and the screw terminals allow any other input source to be connected, such as AA and 9 V batteries, or even that old 7 V wall adapter you might have lying around.
Bllimpduino 2 is a very low cost open source autonomous airship. It consists of Arduino M0 airship controller board and on-board WIFI and laser sensors. Two vector differential thrusters and one lift thruster. The design is simple, yet exciting.
The author specially bought a laptop motherboard, and then DIYed the peripherals and casing. The overall effect is quite beautiful.
The standby time is acceptable and in good condition, more than 7 days.
Plant Bot is an open source project based on ESP32 that allows a single PCB to perform the functions of detecting humidity, watering, providing lighting, and controlling and communicating with the user via WiFi/BLE.
Have you ever wanted to install a security camera in your home, garden or office? Although commercial Wi-Fi security cameras on the market are not expensive, if you want to install multiple ones in different scenes or rooms, it will cost a lot of money. Young engineer Max can develop a wireless security camera based on Espressif's ESP32 chip with only $15.
Have you ever thought about attaching an inertial measurement unit (IMU) to an object to track its posture and motion? Tracer provides high-performance, safe, reliable and low-cost object tracking. Tracer can be easily attached to objects using Velcro. It can tilt and track rhythm as the bike's frame tilts, it can record the number of shots taken with a tennis racquet, and it can even differentiate between topspin and chip shots. Let your imagination run wild and explore more interesting applications of Tracer!
This BLDC motor driver board is capable of driving one BLDC motor, or one or two bidirectional DC motors (H-bridge configuration, cascaded to support a second motor) or up to three unidirectional DC motors (half-bridge configuration).
The project presented here is a bipolar stepper motor driver. It is based on the BD63731EFV chip, a low-power driver driven by a PWM signal. The project power supply voltage is 8~28V DC, and the rated output current is 3A. The input interface adopts CLK-IN drive mode, and the excitation mode corresponds to FULL STEP mode (2 types), HALF STEP mode (2 types), QUARTER STEP mode (2 types), 1/8 STEP mode, 1/16 STEP mode through the built-in DAC . In terms of current attenuation, the SLOW DECAY/FAST DECAY ratio can be set without any restrictions and all available modes can be controlled in the most suitable way. Additionally, the power supply can be driven by a single system, simplifying design.
Although Geiger counters can be used to detect amounts of radiation, and with some tricks can also differentiate between the three types of radiation (alpha, beta, and gamma), their use is limited in identifying radioactive materials. For this purpose, gamma-ray spectrometers come in handy.
You can certainly buy desktop power supplies, but they're not cheap. As the current capacity and output voltage quantity increase, so does the price. While a commercial desktop power supply is certainly worth the investment, you may want to consider a cheaper solution. Adapt an old computer power supply for use on your workbench. Computer power supplies have all the voltages you need and some very impressive current capabilities.
USB-Cereal is a powerful, fully open source development tool that simplifies testing, development, debugging and manufacturing of devices using USB-C. Using the extended capabilities of USB-C, this unique hardware saves time and effort by simplifying debugging and factory log capture, as well as firmware update procedures.
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