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M5Stack Core 2 - Audio Input - Explore the audio capabilities of the M5Stack Core 2, and learn about the potential impact of the plastic case and differences between the PDM and PCM microphones. Discover how to set up the I2S config, manage audio processing, and create a stunning audio visualizer.

ESP32 Audio Monitor using TFT_eSPI (TTGO) - Learn how to port an M5Stack Core2 Audio Monitor for use on any ESP32 with a TFT screen, by utilizing a TTGO board. Find the modified code on GitHub and modify it for your preferred board.

DIY e-Reader update - ported to the M5Paper - Discover the latest updates on the DIY e-reader project, featuring the sleek M5 paper device with an SD card for storing numerous books, a jog button for navigation, and a crisp display! Check out the Github link and try it out.

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.

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.

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More Updates on the ZX Spectrum Board - I'm gearing up for production with some updates to our prototype, including switching to a 4-layer board to improve EMI, and refining USB power filtering. Check out the video for a deep dive into our battery charger and an exciting expansion port for potential HDMI output. The main goal now is to get our boards ready for manufacturing and shipping through Crowd Supply!

ESP32 TV Version 3 - In the latest board revision, I've successfully resolved some key issues, including a USB interface conflict between the USB2244 and the ESP32 and a risky battery charging mistake—no more direct USB 5V to the battery! Plus, I managed to wrap this up without any clumsy bodge wiring. I've even introduced a new feature: a microphone is now on board, setting the stage for some exciting future projects. Stay tuned for what's coming!

Raspberry Pi BTLE Device - Just wrapped up the first iOSCon hackathon and had a blast tinkering with my Raspberry Pi, turning it into a full-fledged Bluetooth device in sync with an iPhone app. Used node for setting up and Bleno for creating Bluetooth low energy peripherals. Penned down each step for you to replicate, right from writing strings on my LCD to reading temperatures and getting notified of IR remote button clicks. Ran it on an app store or GitHub test application. Also, explored the Core Bluetooth framework for iOS app creation, for reading and writing data to the Raspberry Pi. Let's keep creating magic with technology!

16 bit mini handheld video arcade - Disassembling a 16-bit mini handheld video arcade revealed a fairly uncomplex interior with most of the functionality being handled by a blob chip on a single-sided PCB. Despite the simplicity, the impressive design manages to fit 156 games into flash storage on a multi-layered daughter board, which helps simplify the main board's design. While not as hackable as hoped, the teardown provided an interesting glimpse into the device's construction.

1 touch pin 8 touch pads - To make my ESP32 ZX Spectrum touch keyboard work even better, I needed to ensure every key was independent. The ESP32-S3 only has 14 touch pins, so I’ve been using a matrix approach. While this works well, it struggles with key combinations, critical for the ZX Spectrum. I explored touch detection and experimented with analog multiplexer ICs (4051 series) to expand the touch pins. Initial tests were promising. After prototyping with breadboard-friendly versions and ordering parts, the new keyboard was not only functional but exceeded my expectations. Scanning the keyboard now takes around 20ms, and the solution is ready for production. This was the last big challenge, and I’m thrilled with the results!