This circuit was found in an old Popular Electronics. The integrated circuit is equivalent to a double 741. The source does not have to be symmetrical.
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
Twin-T oscillator are a good solution for the production of low-frequency sinusoidal signals. The...