An alternative clock with a unique style, easy to build, and a great piece of furniture! Introducing the new Floppy Voltmeter Clock!

DIY Groovebox / Synthesizer / Sequencer with 6 OP FM, VA, 2x16 MIDI Channels and 8 voice Chromatic Sample Player, based on a Teensy 4.1

The ESP32 Portable Inductance Meter is a low-cost, high-precision tool designed for students, researchers, and hobbyists, offering ESP32-powered processing, dual reference capacitors for enhanced accuracy, and a rechargeable portable design—making inductance measurement more accessible and reliable for educational and experimental use.

This project aims to produce a fully assembled Meshtastic node based on the ESP32-S3 and RA-01SH, both of which are avaliable for assembly by JLCPCB. The only components to be bought outside are the antenna and LiPo battery. The PCB will include battery charging and SMA connector. Meshtastic® is a project that enables you to use inexpensive LoRa radios as a long range off-grid communication platform in areas without existing or reliable communications infrastructure. This project is 100% community driven and open source! Meshtastic utilizes LoRa, a long-range radio protocol, which is widely accessible in most regions without the need for additional licenses or certifications, unlike HAM radio operations. These radios are designed to rebroadcast messages they receive, forming a mesh network. This setup ensures that every group member, including those at the furthest distance, can receive messages. Additionally, Meshtastic radios can be paired with a single phone, allowing friends

Flea-Scope™ is a very low-cost ($18 from Elecrow) and easy-to-use 18 million sample-per-second (Msps) USB oscilloscope and mixed-signal logic analyzer with a built-in waveform generator, and so much more, based on the PIC32MK MCU!

This project guides you through designing, 3D printing, assembling, and finishing a custom Bluetooth speaker with a wood-like finish and great sound quality.

3D-printable watch case specifically adapted for the Elecrow ESP32S3 PCB with a round display, allowing you to turn this electronic board into a functional smartwatch. This project provides a practical and stylish solution to integrate the ESP32S3 into a wearable format while maintaining access to its advanced features. https://cults3d.com/zh/3 Features of the Case Ergonomic and modern design Easy and optimized 3D printing Access to the PCB's ports and sensors Robust and lightweight structure Compatible with standard watch straps With this case, you can wear a fully functional ESP32S3 on your wrist, add sensors, and create your own applications for home automation, health tracking, smart notifications, and much more. Elecrow is organizing an online competition, and I have submitted this project. If I win, I will release this case as Open Source and make it freely available to the entire community. Your support is essential. Share this project and help me give it maximum visibility

This Portable Mini Weather Station, powered by ESP12F and a vibrant 1.5" TFT display, fetches accurate weather updates

This universal power supply board is a perfect match for powering the low power devices such as MCUs, Sensors & Modules with the best load and line regulation features. The board can take an AC or DC input of as low as 8V and as high as 28V to provide a multiple DC output voltages like 3.3V, 5V, 12V, variable DC output, and the output same as the input. The maximum load regulation is measured to be 60mV and the maximum line regulation is measured to be 0.2%/V.

Simple and inexpensive way to make such a device, if you have basic knowledge of electronics and microcontrollers.

The P-Bit is a compact, modular IoT platform designed for hands-on STEAM and sustainability education. Equipped with temperature, humidity, light, sound, and soil moisture sensors, it allows students to collect real-time environmental data, analyze trends, and connect to the cloud for deeper insights. It features an ESP32-WROOM-32E processor with Wi-Fi and Bluetooth connectivity, a 1.8” TFT display, a rotary encoder, and GPIO/I²C expansion for additional sensors. Students can monitor microclimates, optimize irrigation, and study noise pollution through an intuitive interface. By integrating IoT and data science into the classroom, P-Bit helps address the urgent need for climate literacy, empowering the next generation with the tools to understand and protect the environment. More than just a sensor, it is a gateway to smarter, more sustainable learning.