True RMS Voltmeter (CB25353E)

This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a common type at the time.

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Set Reset Flip Flop (CB20675E) Found in a 1968 documentation, this circuit can be applied to any logic. In this case, we have an example for TTL. a href="images/stories/bc/203509352025_002235_0001.gif" target
With the first project we present, a relay is activated in the presence of light. We can use it as...
MW Radio ZN414 (CB20450E)
The ZN414 is an uncommon integrated circuit currently used in the elaboration of very simple MW...
Signal Detector (CB24692E)
This circuit can be used to detect the signals from the previous circuit or from any radio...