This regulator or voltage reference consists of a variable zener diode. We found it in the June 1984 issue of Radio Electronics magazine. The output current is low.
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...