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 simple alarm with latching uses a relay as the main element. The circuit is from a Radio...
The circuit shown in the figure generates pulses of up to 200 V under a current of up to 200 uA...
This circuit is from a 1964 Electronic Design. The sensor is an LDR and the transistors are...