We found this circuit in a 1986 documentation. It uses only LEDs, batteries, resistors and the power supply which can consist of 4 batteries or a 9V battery. The basic circuit uses two-color LEDs.
This circuit was found in a 1980s documentation for amateur radio. The circuit is for 9 MHz...
This circuit generates a linear sawtooth signal. The circuit was found in the December 1992 issue...
I found this simple basic circuit of rhythmic light in a 1980 documentation. We warn you to be...