The purpose of this circuit is to measure the resistance of an antenna at the resonant frequency. The circuit is from an old American documentation for hams.
Static charges in objects Dan be detected by this sensitive electroscope. The meter indicates when the...
Found in Popular Electronics from the 90s, this circuit generates a 1 kHz signal. The coil is from an...
Using a 555, this configuration appears elsewhere on this site. This is from American...