This circuit with 117 V output was found in a 1969 Electronic Design. Drive transistors admit equivalents and information about transformers is not given.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
In the circuit shown in the figure to the side, the relay is activated when the light stops...
With this name, the English publication where we found this circuit indicated a sensitive touch...