Oscillators up to some megaherts can be made with comparators like the LM139, 239 or 339. Theses oscillators produce excellent square signals for general purposes. In our simulation the oscillator runs in low frequency, driving a LED like a flasher.C1 and R5 can be change to produce different frequencies. The simulation uses a 3D LEDs that blinks when the simulation is turned on. The circuit can be powered from 5 to 12 V if mounted.
To download the simulation files and Netlist - click here (ni0017.zip)
