This circuit was found in the September 1984 issue of Radio Electronics magazine. The frequency is given by the capacitors. The diodes help in the starting process.
Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the...
The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. The...
With this circuit it is possible to control two LEDs of different colors, making their color...