This bistable circuit that drives a relay with a pushbutton was found in the March 1pp6 issue of Electronics Now magazine. A common bipolar with a 1k resistor at the base can be used in place of the FET.
The operational amplifier used in this configuration is uncommon today, but more modern types can...
This is a circuit that appears several times in this section and in articles. It is a preamplifier for...
We found this circuit in the August 1994 issue of Electronics Now. The 4046 is unusual today. The...