Flasher CA3130 (CB22004E)

Found in an English documentation from 1977, this flasher or pulser circuit drives an LED. The frequency depends on C2.

Sweep Generator (CB3955E)
In the figure we have the circuit of a sweep generator obtained in an old publication. The central...
Solar panel linear power source (CB21023E)
The circuit is from an Electronics Hobbyst Handbook from the 90s, being valid for panels of the...
NE602 Frequency Doubler (CB25303E)
This circuit provides a signal that is twice the frequency of the input signal. The circuit was...