Even for the non-musical among us there is a lot of fun to be had with a simple synthesiser and sequencer, as the different controls can be manipulated to show …read more (https://hackaday.com/2026/09/23/a-tiny-toy-synth-for-smaller-computers/)

Audio Spectrum Analyzer on an ESP32 Display Board
https://hackaday.com/2026/09/23/audio-spectrum-analyzer-on-an-esp32-display-board/

A slick spectrum analyzer used to be the kind of thing that would have been tricky to include in a DIY project, but as [Mirko “mircemk” Pavleski] demonstrates, a modern …read more (https://hackaday.com/2026/09/23/audio-spectrum-analyzer-on-an-esp32-display-board/)

Reconstructing Device Firmware from SPI Reads
https://hackaday.com/2026/09/24/reconstructing-device-firmware-from-spi-reads/

If you wanted to extract the firmware from a mystery device, you might pull the flash chip out of it and toss it into a reader. But if you only …read more (https://hackaday.com/2026/09/24/reconstructing-device-firmware-from-spi-reads/)

Solar Powered Traffic Monitoring
https://hackaday.com/2026/09/24/solar-powered-traffic-monitoring/

[Marios Christoforou] recently undertook a Computer Engineering degree at the University of Cyprus. His final year project involved implementing a solar-powered device to count vehicular traffic, while logging results to …read more (https://hackaday.com/2026/09/24/solar-powered-traffic-monitoring/)

After Decades, NASA May Finally Replace Mars Relays
https://hackaday.com/2026/09/24/after-decades-nasa-may-finally-replace-mars-relays/

We’ve yet to find any definitive evidence that there’s biological life on present-day Mars, but to say it’s a dead planet isn’t exactly accurate. Since the first Viking lander touched …read more (https://hackaday.com/2026/09/24/after-decades-nasa-may-finally-replace-mars-relays/)

Standalone DJ System Runs On ESP32
https://hackaday.com/2026/09/24/standalone-dj-system-runs-on-esp32/

There are plenty of ways to DJ with a laptop and various controller setups. However, if you find hauling around an entire computer can be a bit much, you might …read more (https://hackaday.com/2026/09/24/standalone-dj-system-runs-on-esp32/)

UDP Broadcasting and the Brave New World of IPv6
https://hackaday.com/2026/09/24/udp-broadcasting-and-the-brave-new-world-of-ipv6/

After recently working our way through UDP broadcasting and network subnetting all in the comfort zone of IPv4, it’s time to address the elephant in the room, the one wearing …read more (https://hackaday.com/2026/09/24/udp-broadcasting-and-the-brave-new-world-of-ipv6/)

Handheld Scanner is a Radio Multi-tool
https://hackaday.com/2026/09/24/handheld-scanner-is-a-radio-multi-tool/