This circuit was taken from a Popular Electronics from the 90's. The power step can be changed to operate with the most powerful LEDs available today.
No information is given about the transformers in this circuit suggested by Motorola in a 1968...
This circuit was found in a 90s American documentation. The circuit uses still common components...
There is nothing new in this configuration of an old document that used the MC1555, Motorola's version...