[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s] design adds ...

A lot of headphones today come with volume control built in on the wire. If your headphones didn't, though, you can craft your own with a few basic, salvagable electronics. There are actually two ways ...

A quick search on Google will bring up countless ways to make DIY speakers (or volume boosting amps) for a smartphone. From a paper cup to a glass jar, nearly all of these will give you some extra ...