OpAmp Oscillator 2
An improved design of version 1. This is a simple square wave oscillator that uses a single opamp. Improved in that it uses one fewer parts and that it is easier to understand how it operates. Although the diagram shows a 10 supply, any supply the opamp can handle is acceptable. Very good for low power applications (much lower than comparable 555 circuits). This circuit also performs very well at extra lower frequency oscillations (on the order of seconds or longer) where other circuits don't. The upper limit of oscillation frequency seems to be limited to the device abilities.