This circuit was found in a Motorola documentation from 1968. The circuit makes use of FETs and bipolar of the time and can be applied to modern equivalents.
This is the well-known lightning lamp that was published in the March 1988 issue of Saber...
The CMOS 4046 integrated circuit is seldom used, both due to the difficulty of finding it and the...
What this circuit does is to detect when a signal reaches a certain value determined by the two...