This circuit was found in a 90s Radio Electronics. MOSFETs must have excellent heat sinks and heat and the board layout carefully planned to withstand high currents.
This proximity relay circuit was found in the July 1990 Radio Electronics magazine. The supply...
This circuit is from an old operational amplifiers manual. However, the setting applies to modern...
Using an operational amplifier, the figure shows how to convert the waveform to low frequency...