uFreq V1.0 is a teeny tiny prototyping friendly adjustable frequency and duty cycle oscillator. Version one has power in, and square wave out, simple as that. There's an on-board power LED, and an on-board signal LED, two chips, three resistors, two capacitors, and two mini potentiometers, so the build is incredibly fast. The uFreq is also slightly less bulky than the average signal generator.