This circuit was found in Ferranti's 1974 transistor manual. The transistors are from the period and the frequencies generated are between 50 Hz and 2 kHz.
This circuit was found in a Popular Electronics from the 90s. The circuit has temperature...
Found in old American documentation, this receiver transmits signals via the power grid. We can...
This circuit is from the LM317's own manual obtained from an old documentation. The IC should be...