This circuit with low-slip characteristics uses an operating system that is not very common today. The circuit can be designed with more modern operational and equivalent FETs.
This circuit was obtained from an old American documentation having a limited adjustment range....
This 555 timed touch switch was found in a 90s Hands-On Electronics. It triggers a buzzer, but a...
The transistors of this old circuit from the 60s can be the BC548, in a current version. The...