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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Passage Relay 555 CMOS C (CB15871E)
In the figure we have the shot made by an interrupted light beam using a phototransistor or a...
Sine to square converter (CB21989E)
Using a CA3130 operational amplifier, this circuit from a 1977 documentation can handle low...
Receiver for Optical Audio Lin (CB1365E)
This is the receiver for the CB1364E transmitter. Other receivers can be found in this section of...