This low power bass booster is from the 1977 National Semiconductor Audio Handbook. The circuit is powered by 6 to 9 V voltages and the feedback determines the enhanced bass range.
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...
The indicated circuit performs a slow charge of 12 V batteries maintaining a constant current of...
This ultra-simple circuit need a carbon microphone to operate. The circuit must be powered from D...