The figure shows a white noise generator circuit that uses a transistor junction to generate the signal. The circuit is from a Radio Electronics magazine from March 1990.
This circuit that emits siren sound can be used in a fire alarm. We found it in an old American...
The filter shown in the figure, suggested by National Semiconductor, only allows frequencies above...
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...