Music

Homegrown opto-organ

Homegrown opto-organ

Jörg shares another unusual approach to sound circuits with this mini optical organ, inspired by the legendary Optigan keyboard instrument – my instrument generates the tone with a light depended resistor which kann be controlled by an LED. the speed and patterns on the disc determine the frequency and shape of the resulting wave form. […]

Super Class A 30W amplifier

Super Class A 30W amplifier

I love ogling these crazed homebrewed audio power amps that people build. This one is based on Jean Hiraga’s 20W Class-A Amplifier, but it’s been tricked out further to become the “Super Class A 30W Amplifier.” Check out those monster caps. Those are six 220000 uF capacitors (1.2 Farads!) and (in the center) that’s a […]