This circuit works as both an injector and a signal follower. We found it in the May 1994 issue of Electronics Now. The Z1 headphone must be high impedance.
We found this power supply in the 1982 SGS Linear Integrated Circuits manual. The L296 is not...
This circuit monitors the voltage of a 12 V battery. The indicated levels let you know if the...
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...