Bass Control (CB21294E)

This circuit with losses of 20 dB at 350 Hz was found in older documentation, but it applies to modern preamp and amplifier circuits.

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High impedance preamplifier (CB20259E)
This preamplifier appears elsewhere in this section and this version was found in American...
InfoLITHIUM Charger (CB17181E)
This 2000 circuit, found in the documentation of the time, is intended for charging this type of...
Visual metronome (CB21062E)
Based on the well-known LM3909, this LED pulser circuit was found in American documentation from...