Found in a 1970 EEE, this circuit generates signals that depend on the C1 capacitor. Transistors are general-purpose types.
This circuit can be used both as a beat oscillator and for testing and adjusting AM receivers for...
Using a 4046 PLL, which is not very common nowadays, this circuit was found in the October 1994...
Found in a 1991 Hobbyst Handbook, this circuit monitors both battery and alternator voltage. The set...