Latching relay (CB25722E)

The figure shows how to connect a relay to obtain the latch effect. The circuit is from an Electronics Now from June 1994.

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LM3914 Moving Point Voltmeter (CB25449E)
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a...
Peak Indicator (CB5329E)
This circuit is from an old documentation but still current for assembly. Just use BC548 instead...