This circuit was obtained in an old documentation, but it is still current by the used components. The circuit must be powered by a 12 V regulated power source.
This experimental good sensibility radio was obtained from a 1968 magazine. The magazine no longer...
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
Found in a 1965 Electronic Design, this circuit makes it possible to select signals with an...