This sophisticated transmitter was found in the June 1993 issue of Electronics Now magazine. The transmitter consists of a dedicated integrated circuit of the time.
This one-digit photometer using CMOS circuits was found in a 1989 documentation. The circuit is...
The presented circuit generates signals in a 1:10 frequency range depending on the Ct capacitor. See the...
This circuit, from a 1988 publication, consists of a timer that activates a relay at the end of a...