This interesting multi-channel circuit was found in the August 1988 issue of Radio Electronics magazine. It monitors the signal from 4 sound channels simultaneously.
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. This...
Found in a 90’s Electronic Design, this circuit generates stable signals in frequency given by the...
This circuit was found in Philips documentation from 1965. No information was given about the...