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 has a traditional configuration explored in several other points of this site. The...
We found this traditional flasher configuration in a June 1969 Radio Electronics magazine. SCRs...
This circuit was obtained in a 1979 publication. The operational amplifier is of the type with...