This circuit drives a load with a delay given by the RC timing components. The circuit is from 1970s documentation. The diode is a general-purpose type.
The resistors R determine the frequencies of the oscillator together with C. The circuit is from a...
This circuit is from a 1977 timers Cookbook, but can still be easily assembled with the eventual 3130...
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...