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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Touch switch (CB9562E)
This sensitive touch key appears on this website from other sources. This version was taken from a...
Nonlinear Gain Amplifier (CB6130E)
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
LED strobe CIR11912S (CB19565E)
CMOS 4046 (PLL) is not very common. In this circuit it generates short pulses to excite a high...