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 components of this filter are calculated using the formula f = 1 / RC and it can be...
The circuit is from an Electronics Hobbyst Handbook from the 90s, being valid for panels of the...
This configuration was found in an English magazine from 1965. It is valid for any junction FET. The...