This circuit is from a Popular Electronics from the 90s, consisting of a repeater relay for remote control of TV, which today can be done by Wi-Fi or other simpler resources.
The operational amplifier used in this circuit is not very common today and the signal is...
The purpose of this interesting circuit found in a 1977 documentation is to complete the last...
This oscillator was found in the January 1996 issue of Electronics Now magazine. The frequency is given by...