This circuit generates rectangular signals from 2 Hz to 20 kHz using an operational amplifier. The circuit is from 1984 Radio Electronics. The power supply must be symmetrical.
This two-phase stepper motor circuit was found in an old documentation using an operational amplifier...
This circuit is suggested by National Semiconductor and with two operational amplifiers an LM833...
This circuit is from the September 1985 issue of Radio Electronics magazine. The circuit has an...