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GSM remote control: emulating the TDG series (part 2)
Let’s emulate the TDG series remote controls using the GSM Shield. Second and final instalment. We left off last month after presenting the design of the 2IN/2OUT remote control that emulates the...
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GSM remote control: the GSM Shield for SIMCom and Quectel modules (part 1)
We emulate the TDG series remote controls using the GSM Shield. It was not long ago that we presented our GSM shield for GSM/GPRS modules from SIMCom, QUECTEL, FIBOCOM and others, designed to be...
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MAX7219 LED Matrix with Arduino: Wiring and Library Guide
Let’s find out how to use the MAX7219 to drive an LED matrix. Wiring, Arduino libraries and sketches will guide us through building custom graphic and numeric displays. An LED matrix display is one of...
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Laser Parking Assistant Using ToF Technology
Using a brand-new laser distance meter based on ToF technology, we are building a parking assistant for garages and car ports. The garage space problem Cars have grown over the years within the same...
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IoT Gate Opener with the Ganimede.E12 Board
With the Ganimede.E12 board, we manage the opening and closing of a gate, or other electronic devices, using a dedicated smartphone application. The problem with DIY IoT devices Nowadays, attention to...
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Soil Moisture Sensor
Equipped with a fork-shaped sensing element, it is ideal for detecting soil moisture levels in various applications, not least monitoring plant health, but also detecting the presence of water on the...
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Automated Mini Greenhouse with ESP32 and Sensors for Home Assistant
The ESP32 mini greenhouse is a smart project that lets you monitor and control the indoor environment for growing small plants. It uses an ESP32-C3 Super Mini board, environmental sensors, and...
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Angelo: an open source portable audio amplifier optimized for the human voice
We build a portable, open source audio amplifier optimized for the human voice, designed to improve communication with elderly or hearing-impaired people, and easy to use and customize. Some projects...
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GSM Emergency Call System with RF Receiver for Elderly and Bedridden Patients
This emergency call system uses a cellular module and an RF receiver tuned to a dedicated transmitter. Pressing the transmitter button sends phone calls and SMS messages to selected numbers, making it...
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How to Build a 1000W ZVS Induction Heater Using a Resonant RLC Circuit
Let’s Melt Metals Using the ZVS (Zero Voltage Switching) Technique Applied to a 1,000W RLC Resonant Circuit Have you ever wondered how intense the electromagnetic fields surrounding us can be? This is...
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How to Control NeoPixel Installations via Wi-Fi Using Fishino and NodeMCU...
We create NeoPixel light installations with Fishino and NodeMCU controlled via Wi-Fi from a PC or Raspberry Pi using a Python library. A few years ago, the American company Adafruit Industries...
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Creating a Unique Electronic Musical Instrument: The Sound Wall
We place metal foil notes on a panel and play our music by touching them, creating a melody from a truly original instrument. Those who know a little about music or have good memories of the “music...
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Efficient and Compact Stereo Power Amplifier: Unleash High-Quality Audio with...
Stereo power amplifier 10+10W into 8 ohms based on the integrated PAM8610, suitable for systems that require high efficiency and little heat to be dissipated. By now, the miniaturization of...
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Terminus FE1.1 USB hub board: the solution to connect four USB devices
Based on a single chip from Terminus, it allows you to connect four USB devices starting from a micro USB port; the form-factor is designed for pairing with Raspberry Pi Zero. We all know what a...
View ArticlePi-Ener-lite: Compact UPS with Fuel Gauge and RTC for Raspberry Pi Zero
Pi-Ener-lite is a compact UPS for Raspberry Pi Zero with a CW2015 fuel gauge, DS1307 RTC, and 18650 battery support, all connected via spring-loaded pogo pins.
View ArticleSonicFly: the drone that follows another drone using only sound
SonicFly lets a drone follow another using only the sound of the leader's rotors—no GPS, cameras, or radio. Built by Yanbaihui Liu, it uses a four-microphone array, neural network, and Kalman filter to...
View ArticlePyBLE: A Bluetooth LE MicroPython IDE for ESP32
PyBLE is an open-source MicroPython IDE that communicates over Bluetooth LE, letting you code, run, and debug ESP32 boards wirelessly from a tablet or iPad—no cloud, no USB cable, no PC required.
View ArticleIoT Gate Opener with the Ganimede.E12 Board
Control a gate or other electronic devices from your smartphone using the Ganimede.E12 board and a dedicated mobile app, with a focus on privacy and security.
View ArticleGemma Translator: offline voice interpreter on Raspberry Pi 5
Gemma Translator is an open-source multilingual voice interpreter for Raspberry Pi 5 that runs entirely on-device, using Google Gemma 4 and LiteRT, with a retro-terminal UI and no cloud dependency.
View ArticleOpen Source Firmware for the MasterBuilt Gravity 800: Controller Reverse...
A maker known as PRBS23 has freed the MasterBuilt Gravity 800 Grill controller from proprietary firmware, replacing it with an open source firmware featuring PID temperature control, over-the-air...
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