This 1988 circuit makes a back-and-forth of LEDs whose speed is controlled by P1. All components used are common and the circuit can be powered by voltages from 6 to 9 V.
This circuit was found in documentation from the 1980s. The circuit can be designed based on...
This circuit uses two operational amplifiers, which can be of the type 741, in a full wave...
Other series operational amplifiers, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...