Granddad, there’s a tube on my Raspberry Pi
I knew it had to happen some day: the Raspberry Pi goes back in time by the addition of a vacuum tube. Pi2Media (a division of Pi2Design) have pulled it off, but with a twist. They say their 503HTA Hybrid Tube Amp HAT is the first tube amp specifically designed for any of the 40-pin versions of the Raspberry Pi SBC family, giving it that “Sweet Tube Sound”. This HAT allows the RPi to drive headphones from 32 – 300 ohms with ease and fidelity.