How to build your own air quality meter with a Raspberry Pi and CO2 sensor

In winter, it’s important to ventilate living and working spaces regularly. Here’s how to make a homemade measuring station ...
Liliputing

This Raspberry Pi 5 add-on gives you four more Ethernet ports

While the FPC connector on the Raspberry Pi 5 makes it possible to add hardware like PCIe NVMe adapters, a whole bunch of USB ports, or extra Ethernet ports, it’s worth keeping in mind that the ...
Hackaday

Trace Tracing To The Tunes

Some kind of continuity beeper has been a standard piece of gear since the dawn of electronics. Sure, you probably have an ...
Hackaday

Tick, Tock, Train Station Clock

We’ve seen a few H-bridge circuits around these parts before, and here’s another application. This time we have an Old Train ...