Full wave rectifier filter (CB7582E)

This circuit was found in a Popular Electronics from the 90s. The power source must be symmetrical and the operational amplifiers can be 741.

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Digital Wind Indicator (CB26031E)
We found this circuit in an article in Electronics Now magazine from November 1997. The circuit uses...
Low Power Amplifier with Transformer (CB12874E)
This circuit provides just over ½ W to a small speaker. We found this configuration in an old...
SIDAC Relaxation Oscillator (CB4243E)
In the figure we have a typical relaxation oscillator with a SIDAC as well as waveforms and...