This is the receiver circuit for the transmitter of the previous circuit using an integrated circuit of the time. The circuit is in the same Radio Electronics magazine as August 1986.
We found this circuit in a 1977 publication for radio amateurs. It serves to test general purpose...
This circuit is from a 1998 Poptronics. The circuit triggers a buzzer after a certain time, waking...
This circuit for electronic voltmeter was found in a publication by Gernsback from 1960. The...