This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies to other operational ones and component values are given below the diagram.
This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used....
This VCO or Voltage Controlled Oscillator was found in a Popular Electronics from 1991 but can be...
We found this circuit for an anti-theft radar that operates at 400 MHz in a Radio Electronics from...