This telegraphy circuit generates an audio tone from a pure RF carrier. We found it in a publication by Gernsback from 1960.
This circuit can be used in PLL, frequency synthesizer in FM and VHF receivers, reducing a...
Found in documentation from the 1990s, it uses a sound effects integrated circuit, the SN7677 from...
An oscillator whose frequency can be adjusted between 500 Hz and 5 kHz with the use of a...