LED Sequencer (CB21711E)

This is one of the many versions of this circuit that appear on this site. We got it from an internet documentation.

VCO With Operational (CB15466E)
The circuit shown in the figure uses two of the four operational amplifiers found on the LM324...
Linear Amplitude Modulator (CB21087E)
Found in an Analog Devices documentation from the 90s, this circuit uses a component of the time,...
Audio limiter (CB21068E)
This circuit was obtained from a Radio Electronics from the 90's. The circuit limits the strength of...