Here's how it works: every time you log in, the website asks the device to cryptographically prove your identity. The device only responds after you physically touch or press a button on it, confirming that a real person, not a script or a remote attacker, is initiating the login. This means that even if someone steals your password, they still can't get into your account without physically…
SmartTape is a pocket-sized, battery-powered digital laser measuring tool designed around this idea. It can measure distance, calculate area and volume, determine indirect height using tilt information, track maximum and minimum distances, and work as a digital spirit level. All of these functions are controlled using a single spring-return rotary knob and displayed on a 1.3-inch OLED.
Voice-controlled smart devices have transformed the way we interact with technology, and with the arrival of Espressif’s ESP32-S3 platform, building a compact and intelligent voice assistant is now within reach for makers. To explore the possibilities of on-device AI and low-power voice interaction, I designed a custom ESP32-S3-based voice assistant that integrates Espressif’s Audio Front-End…
Reliable off-grid communication has always been a challenge for hobbyists, makers, and outdoor explorers. Whether you’re hiking deep in the mountains, setting up a temporary field station, or working in disaster-prone areas with poor connectivity, staying connected without mobile networks is often critical. Traditional radios offer range but lack modern features, while Wi-Fi and cellular…
The Precision Digital Micro Current Meter is a purpose-built hardware solution designed to accurately measure extremely low current levels in embedded and battery-powered systems. At its core is the STM32G071KBU microcontroller, chosen for its robust ADC performance and peripheral flexibility.
Learn to build a wireless stepper motor driver using ESP32-S3 and TMC2240. Features USB-PD power, magnetic encoder feedback, web interface control, and RGB status LEDs. Complete PCB files and code included
The Wearable Air Quality Pendant is a small, power-efficient device designed to monitor the air you breathe continuously. At its heart is the ultra-low-power STM32U083KCU6 microcontroller, which works alongside the SGP40 gas sensor to detect Total Volatile Organic Compounds (TVOC) in the environment. The sensor is managed using the DFRobot_SGP40 library.
This modern desktop weather station features an ESP32-S3 and a 4.2" multicolour E-Ink display for real-time indoor and outdoor weather updates. It fetches data via Wi-Fi from OpenWeatherMap and uses the HPP845E sensor for indoor readings. Housed in a 3D-printed case with a custom PCB, it’s designed for low power use and aesthetic appeal. The firmware is based on David Bird’s weather display…
All tech professionals and makers often face the challenge of managing multiple devices and connections simultaneously. With an increasing number of USB-powered devices like microcontrollers, SD cards, industrial machines, and external peripherals, juggling between adapters and hubs becomes cumbersome. Moreover, limited USB ports on PCs further complicate workflows, especially when high-speed…
This project introduces an innovative solution to automate waste segregation using a SCARA Robot enhanced with computer vision and machine learning. The project used a pre-deployed AI model to classify the objects into organic or inorganic waste. At its core, the project utilises a Raspberry Pi paired with a USB camera to capture images of waste materials, this captured image is then processed…
Learn how to build a DIY SCARA robot arm using the ESP32-C6, NEMA 17 stepper motors, TMC2209 drivers, and SG90S servo motors for precise automation tasks. This project combines affordable components with high functionality, making it ideal for robotics enthusiasts and educators.
The ESP32 AI Smartglass is an innovative wearable device that blends the power of artificial intelligence with the convenience of home automation. Built around the ESP32-S3 mini microcontroller with 4MB of flash and 2MB of PSRAM, this smartglass is equipped to handle a variety of tasks efficiently.
This DIY modular lithium-ion cell grading tool offers precise control over charging and discharging cycles for up to 250 cells, ensuring accurate performance evaluation. Powered by the STM32G071 microcontroller and TP4056 IC, it provides real-time data through companion software. Ideal for electric vehicles, energy storage, and portable electronics, this scalable solution supports efficient…
Efficient water management is crucial in addressing this challenge, and technology plays a vital role in it. By monitoring and managing water usage, we can significantly reduce wastage. As a first step in addressing this, we have designed an IoT based water flow meter.
Never lose your valuables again! Inspired by Apple's AirTag, we've created a DIY Bluetooth Low Energy (BLE) air tag/key finder to help you keep track of your important items. This project uses the MDBT50Q-1MV2 BLE module from Raytac, featuring the nRF52840 SoC from Nordic, an ADXL345 3-axis accelerometer from Analog Devices, multiple LEDs, and an active buzzer, all powered by a 3V CR2032…
Let's build a compact gesture recognition module that can be connected to a computer or a smartphone and control them through simple gestures.
This project focuses on developing a Smart Energy Meter using the ESP32 SoC as the core processing element. The aim is to accurately measure and display key electrical parameters, enhancing energy monitoring efficiency.
Build your own wireless battery monitoring system to monitor individual cell voltage and current remotely using ESP32. This DIY wireless BMS can be used with any lithium battery pack to improve safety and monitor performance.
Sudden power cuts may damage your Raspberry Pi, resulting in lost work or even potential damage to the electronics. Hence using a UPS is always important.
This project utilizes an ultralow power energy harvester PMU with MPPT and charge management to eliminate the need of charging the device.
This project allows you to unleash your creativity and explore the possibilities of the ESP32 HID functionality.
To filter out defective cells and prevent them from getting into a battery pack, manufacturers do something called Cell Grading.