100 Hz Second Order High Pass Filter (CB25815E)

This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power supply must be dual.

WWV Converter (CB7324E)
WWV is the prefix for the United States' time and frequency patterns station. These signals can be used...
Remote volume control (CB23927E)
This wired control circuit serves both volume and balance between channels. We found it in Radio...
555 Audio Oscillator (CB220E)
This circuit produces a loud audio tone by a small loudspeaker. Power supply voltage ranges from 5...