This circuit converts negative logic signals to positive logic signals. We found it in 1969 documentation. Current equivalent transistors can be used.
We found this circuit in a 1998 documentation. The circuit can be made with 12 V, 6 V or even 5 V...
This circuit was found in a 1981 documentation. As you can see, this is a well-designed automatic...
Found in a 90s Popular Electronics, this transistorized circuit generates pulses from 2 Hz to 50...