This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V outputs from 0 to 9 V signals. Transistors may be equivalent.
We found this circuit in an Electronics Now magazine from June 1995. The transformer has a primary...
Found in a 90s Popular Electronics, this circuit keeps an LED on when a phone is in use. Can be...
This circuit was found in a 1968s American. Transistors are of general purpose and the input is a...