This circuit was found in an American documentation from the 90's. The transistor is a general purpose one. The circuit oscillates well between 12 and 30 MHz with the indicated components.
Sine signals are converted into square signals by this simple circuit. The maximum frequency is...
This triac circuit was taken from an article in the July 1970 Radio Electronics magazine. Note the...
This TTL circuit was found in an American documentation from the 80s. The components are common in the...