Build a smart wearable pendant that tracks air quality with STM32 and SGP40 sensors, alerting users through LEDs and buzzer notifications for real-time environmental awareness.
Read more »Wearable Air Quality Monitor Pendant using STM32 and SGP40 Sensor
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Wireless ESP32-Based Stepper Motor Driver with TMC2240
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Learn how to build a wireless stepper motor controller using an ESP32-S3 and TMC2240 driver. This detailed tutorial guides you through wiring, custom PCB design, USB-C PD power management, closed-loop control with an AS5600 encoder, and a browser-based UI with real-time status and RGB feedback. Includes Gerbers, BOM, and full source code.
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Interfacing ESP32 with Thermal Printer using UART ESC/POS
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Technical guide to interfacing ESP32 with thermal printers (PNP-500/RS203) over UART. Explains hardware wiring, power considerations, and implementation of ESC/POS commands for printing text, images, barcodes, and QR codes. Includes detailed circuit diagrams and Arduino code on GitHub.
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Boot Raspberry Pi from USB without SD Card Required
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This hands-on tutorial explains how to ditch unreliable SD cards and boot your Raspberry Pi models 3B, 3B+, 4, and 5 directly from USB or NVMe. It covers setting up USB-boot for each model—from enabling OTP on Pi 3B to updating EEPROM on Pi 4 and using native USB/PCIe boot on Pi 5, boosting speed, reliability, and convenience.
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Build a Cellular GPS Tracker with Raspberry Pi Pico SIM800L
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This step-by-step tutorial walks you through creating a real-time GPS tracker using the budget-friendly Raspberry Pi Pico microcontroller, Neo 6M GPS receiver, and SIM800L GSM module. Learn circuit wiring, Arduino IDE setup, GeoLinker cloud integration, and offline buffering to ensure reliable IoT tracking anywhere.
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Understanding SR Latches: Set-Reset Latch, Gated & Clocked Versions
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Learn the basics of the SR latch, Set-Reset memory circuit, in digital electronics. This tutorial covers truth table, NOR/NAND implementations, gated and clocked variants, and working principles.
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Clocked SR Flip Flop: Complete Guide with Circuit and Truth Table
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Learn how to build a clocked SR flip-flop using NAND gates. Understand its working principle, truth table, and circuit diagram for designing stable digital memory and control logic circuits.
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GT-U16 RTK L1+L5 GPS Module with Arduino
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Learn how to interface the GT-U16 RTK L1+L5 GNSS module with Arduino, decode NMEA data, and analyze real-time satellite signals using iNavTool. Covers RTK concepts, RTCM corrections, and practical setup tips, Perfect for DIY navigation, drones, and mapping applications.
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How to Set a Static IP Address on Raspberry Pi?
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Learn how to set a static IP address on your Raspberry Pi using NetworkManager and nmcli.This tutorial covers step-by-step methods for both terminal and desktop GUI, ensuring reliable network access for SSH, web servers, and IoT projects.
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Arduino GPS Tracker using SIM800L and NEO-6M
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Learn how to build an Arduino-based GPS tracker using the SIM800L GSM module and NEO-6M GPS module.
A complete guide with circuit diagrams, code, and working explanation to set up your GPS tracker.
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