This circuit supplies a continuous voltage at its output, which is the peak value of the alternating input voltage. The circuit is from a 90's EDN, making use of Maxim integrated circuits of the time.
This is a conventional FM micro transmitter circuit already used several times on this site. The...
In the old original version of this circuit from 1989, the LED is common (we recommend 330-ohm...
Found in National Semiconductor documentation, this logarithmic meter is powered with a voltage of only...