One of the simplest ways of keeping a computer system secure is by using an air gap — that is, never actually connecting the system to the network. This can …read more (https://hackaday.com/2024/03/19/photoresistors-provide-air-gap-data-transfer-slowly/)

The Greenhouse Effect Isn’t For Greenhouses
https://hackaday.com/2024/03/19/the-greenhouse-effect-isnt-for-greenhouses/

Think of a greenhouse. It’s a structure with glass walls that lets light in and traps heat, all for the benefit of the plants inside. As for how it works, …read more (https://hackaday.com/2024/03/19/the-greenhouse-effect-isnt-for-greenhouses/)

Running Power and Data Over Just Two Wires
https://hackaday.com/2024/03/19/running-power-and-data-over-just-two-wires/

When you’re hooking up equipment across a vehicle, you’re often stuck sending power and data to and from things like sensors or actuators. The more wires you have to run, …read more (https://hackaday.com/2024/03/19/running-power-and-data-over-just-two-wires/)

PCB Design Review: ESP32-S3 Round LCD Board
https://hackaday.com/2024/03/19/pcb-design-review-esp32-s3-round-lcd-board/

For our next installment, I have a lovely and daring PCB submitted by one of our readers, [Vas]. This is an ESP32-S3 board that also has an onboard round TFT …read more (https://hackaday.com/2024/03/19/pcb-design-review-esp32-s3-round-lcd-board/)

2024 Home Sweet Home Automation: A Piano-Controlled Smart Home
https://hackaday.com/2024/03/19/2024-home-sweet-home-automation-a-piano-controlled-smart-home/

There’s a scene in Willy Wonka and the Chocolate Factory where a little flap in the wall flips down to reveal a small organ embedded there. Gene Wilder plays a …read more (https://hackaday.com/2024/03/19/2024-home-sweet-home-automation-a-piano-controlled-smart-home/)

Cute CO2 Gauge Tells You When to Crack a Window
https://hackaday.com/2024/03/19/cute-co2-gauge-tells-you-when-to-crack-a-window/

[Cyrill] has a good home automation scheme going: there are a number of physical switches set around the place that control the essential functions. The only problem is that in …read more (https://hackaday.com/2024/03/19/cute-co2-gauge-tells-you-when-to-crack-a-window/)

Breadboard SDR Doesn’t Need Much
https://hackaday.com/2024/03/19/breadboard-sdr-doesnt-need-much/

[Grug Huhler] built a simple Tayloe mixer and detector on a breadboard. He decided to extend it a bit to be a full-blown software defined radio (SDR). He then used …read more (https://hackaday.com/2024/03/19/breadboard-sdr-doesnt-need-much/)