This circuit with a dual power supply generates sinusoidal, triangular and rectangular signals. We found it in the magazine Electronics Now of January 1996. The frequency goes up to a few megahertz.
This VCO or Voltage Controlled Oscillator uses common components. TR1 can be a BF245 and TR2 a...
This circuit was found in a 1967 RCA publication. The circuit uses components from that time, and...
Here is a very simple and economical electronic game. Using only one integrated circuit and one...