This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on the XR2206, which is not a component found easily today.
In the figure we have a basic oscillator with inverters obtained from TTL, CMOS or other gates....
The integrated circuit used in this regulator is not very common today. The circuit is from old...
This circuit was found in a 1988 publication. The circuit is an alarm with interrupt sensors that...