This circuit controls 6 LEDs in two sets with the phase change cycles controlled by a 555 oscillator. The circuit can be powered by voltages between 6 and 12 V.
In the figure a circuit that is the basic application of NE567 for the detection of a tone applied to...
This circuit is from an old Italian publication, using components that are no longer manufactured, but that...
We found this switching circuit in a technical documentation from National Semiconductor. The...