Wio Terminal Audio Visualizer Learn about porting an audio monitor to the WiiO terminal, featuring a built-in microphone, gyroscope, accelerometer, light sensor, and infrared emitter. Check out the simple base class used for the display and the efficient template class implementation to swap out between two different display libraries. 16 July 2025
Arduino & C++: Blink Sketch Reinvented with Inheritance & Composition Learn how to create a single Arduino sketch for multiple dev boards using inheritance and composition in C++, improving code readability and maintainability. This tutorial demonstrates the principles by implementing a multi-board LED blink sketch and comparing code sizes to ensure efficiency. 16 July 2025
DIY USB Microphone Showdown: MEMS vs Electret vs Dynamic! Learn how to create a wired USB microphone using a Teensy, I2S MEMS, Electret, and dynamic microphones. Compare their audio quality with a shop-bought USB microphone and discover what's inside it. 16 July 2025
Fun-Size Mailbag: New Tech & Testing Stereo PCBs! Check out some interesting gadgets, including a Wio Terminal, a TTGO display, and a massive e-paper display, as we test new stereo amplifier boards in a Bluetooth speaker project. 16 July 2025
Wireless Mic on ESP32: Bluetooth Struggles & Success! Learn how to create a wireless microphone using ESP32 and Bluetooth Hands-Free Profile (HFP). Although the audio quality isn't perfect, the project pushes the ESP32's capabilities to their limits, resulting in an effective wireless speakerphone. 16 July 2025
Fan Hack: Power Bank to Battery-Free Desk Fan! Learn how to transform a battery-operated desk fan into a rechargeable one using a power bank and some simple modifications. 16 July 2025
Mastering KiCad: Design & Build Your Custom Stereo Amplifier Board! Learn how to create a version 2 of an I2S stereo amplifier board using KiCad in this engaging tutorial. Find out how to set up design rules, import symbols and footprints, generate the PCB layout, and add wiring and custom board outlines. 16 July 2025
AI-Powered Coding: GitHub Copilot Writes Arduino Blink Sketch & WiFi Setup Find out how GitHub Co-Pilot's AI impressively handles a blink sketch and Wi-Fi setup in an Arduino project! 16 July 2025
USB Power Bank Hack Learn how a seemingly harmless USB power bank can be used to hack a computer, showcasing the dangers of plugging in random devices and the importance of being cautious with computer security. 16 July 2025
5K Milestone: Your Fave Projects, YouTube Earnings & What's Next! Celebrate the journey of a tech YouTuber reaching 5000 subscribers, sharing their favorite projects, and offering insights into the channel's viewership demographics and revenue. Watch some hidden gems and get a sneak peek into the upcoming project ideas! 16 July 2025
E-Paper Weather Display: Boost Battery Life with Deep Sleep Mode Learn how to create a weather display using the LILYGO 2.7-inch ePaper Plus Module, featuring step-by-step instructions on programming in PlatformIO, designing an enclosure in Fusion360, and utilizing deep sleep mode for long battery life. 16 July 2025
ESP-Now Range Test: Real-World Results for ESP32 Devices! Learn about the real-world range of ESP-Now devices, with experiments showing a range of up to 500 meters using long-range mode in outdoor settings. Discover the trade-off between range and bandwidth and analyze the data collected during walk tests. 16 July 2025
Build Your Own Custom Bluetooth Speaker with ESP32 & A2DP | DIY Audio Project Learn how to repurpose old iPad speakers with a custom designed stereo I2S Class D amplifier, using EasyEDA for the schematic and PCB layout. Discover how to create a simple Bluetooth speaker using an ESP32 and a stereo amplifier for your DIY audio projects. 16 July 2025
Secret ESP32 Inside Arduino Nano RP2040 Connect! Take a closer look at the Arduino Nano RP2040 Connect, a versatile board that supports Python and contains a 32-bit dual-core Arm Cortex-M0+ processor, WiFi & Bluetooth module, and a six-axis motion controller. Find out how to use the RGB LED, read values from the PDM microphone, and create innovative projects using this powerful, compact device. 16 July 2025
Unboxing Tech Treasures: Laser Scanner, EPaper Display, Audio PCBs & More! Check out the latest mailbag with cool electronics, including a laser galvo scanner, iPad displays, audio amplifier PCBs, and even wake-word detecting microphones! 16 July 2025
ESP32 and GPS Learn how to connect a GPS board to an ESP32 and parse location data using the Arduino framework while walking around. This tutorial also includes tips on troubleshooting serial connectivity with a USB to UART board and a terminal program. 16 July 2025
MicroPython I2S Audio with the ESP32 Discover how to use I2S with Micropython on the TinyPICO board in this detailed tutorial, comparing C++ and Micropython implementations. Learn how to build custom Micropython firmware with I2S support, set up an environment for the project, and use I2S for recording and playing back audio. 16 July 2025
Revamped Audio PCB Walkthrough: Fixing Mistakes & Enhancing Functionality Learn how to modify a custom PCB for an ESP32 walkie-talkie project, including exposing spare GPIO pins, freeing up the DAC pin, saving GPIO pins for the microphone and amplifier, and wiring up the shutdown pin on the amplifier for low power mode. 16 July 2025
Reviving a Broken iPad: Transforming it into a Magic Mirror with Raspberry Pi Zero Learn how to transform an old iPad 1 screen and a Raspberry Pi Zero into a Magic Mirror with this step-by-step guide! Enhance your home with this unique, DIY upgrade. 16 July 2025
ESP32 Audio DMA Settings Explained - dma_buf_len and dma_buf_count Learn how to choose ideal parameters for dma_buf_count and dma_buf_len when working with I2S audio and DMA, exploring the impact of these values on CPU load, latency, and memory usage. 16 July 2025
Record & Playback Audio on ESP32 SD Card: Step-by-Step Guide & Demo Learn how to use the ESP32 to record and play WAVE files to and from an SD Card with ease, using the Arduino framework. 16 July 2025