This week’s How-To comes from our newest contributor: Logan Williams. This simple guide will show you how to build a digital synthesizer that generates and manipulates square waves. Your synt… ...

I was able to key it by shorting out the back to back diodes with a 2n7000 MOSFET. Key up the gate is pulled up to VCC using a 4.7k ohm resistor so the 2n7000 is on and the oscillator is off. Key down ...