Biro Sketchbook

Ruby is an “enhanced” version of the Little Gem battery-powered amplifier. The architecture of the Little Gem has been updated with an input buffer (as found in the Little Gem MkII) feeding the inverting input and the volume control changed from the outpu

(tags: diy electronics guitar)

I am neither an experience cajon builder or an experienced woodwooker in general. I wanted to build a cajon and found a lack of material online to support that endeavour, so I have put together this web page. Comments/corrections welcome. This is a great

(tags: howto guides music drums diy)