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 also detects IR, providing LED indication. The circuit is used to indicate humidity in...
This circuit uses a JFET, which may be of the type BF244 or BF245 and a PNP bipolar that may be...
This circuit can be used to directly control direct current loads or higher alternating current loads...