The operational amplifier used in this circuit is uncommon today, but the configuration can be made with more modern operators. The power supply is symmetrical.
This circuit safely replaces common locks, since, instead of the key, the opening is made with the...
Based on operational amplifiers of the time, this circuit from the 1980s has high input impedance. The...
Sine signals are converted into square signals by this simple circuit. The maximum frequency is...