This circuit generates signals whose frequency depends on C1 and C2. JFETs are common types like BF245 or MPF102.
The purpose of this circuit presented in a 2009 documentation is to monitor, by means of neon...
This circuit is from the November 1974 issue of Radio Electronics magazine. The capacitor...
Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The...