The ESP32-BlueJammer (Bluetooth jammer, BLE jammer, WiFi jammer, RC jammer) disrupts various devices using an ESP32 and nRF24 modules, causing plenty of noise and sending unnecessary packets (DoS). It interrupts: The whole 2.4GHz broadband! Everything that works on 2.4GHz is being interfered, like: audio in speakers being transmitted over bluetooth, microphones on 2.4GHz, smartphone connections, WiFi, RC Drones (etc.), IoT devices, smart gadgets, wireless keyboard & mouse, just anything on 2.4GHz! Ideal for controlled disruption and security testing. Based on 2,4GHz communication. It has a big range (over 30Meters+ - may vary on your antenna and hardware setup!) on newest Bluetooth versions with casual 2.4GHz antennas, you can easily increase this aswell by taking some simple "bigger" router antennas. An amplifier (2.4GHz) may be an good option too! Remember that jamming is illegal and should not be used with malicious intent! This is strictly for educational purposes only!

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

Project #15: Environment – GPS – Mk27

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.

Introducing a cost-effective flight controller PCB designed for budget-conscious drone enthusiasts and educators: powered by the STM32F405RGT6, this board integrates the MPU6050 IMU and BMP280 barometer for stable flight in basic quadcopters and fixed-wing UAVs, offering a reliable, easy-to-integrate solution perfect for learning and experimentation, with open-source compatibility and simplified design.

This is a simple visually interesting toy for describing fluid dynamics.

The Elecrow Pico W5 is a board based on Raspberry's RP2350, featuring unique characteristics that set it apart.

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 is an original add-on meter system for automobiles. By using the ESP32, it can function as an IoT device that displays the current time, and it can also be used to create a G-sensor utilizing its built-in sensors. Of course, when combined with an OBD2 device, it can retrieve data from the vehicle and display it on the meter. Another feature of this device is that it can also be used for racing simulators, serving as an additional meter for simulation setups.

Tesla Coil design made with only one Vacuum Tube and a few passive elements powered by MOT Transformer.

Project #25 - Movement - GPS Receiver - Mk11