The operational amplifier for this tone control found in a 1977 Signetics manual may be the 741. The power supply must be symmetrical and the signal cables short. The bass gain is 20 dB.
This simple circuit is intended to test integrated circuits 555 and 741 in 8-pin DIL enclosures. In both...
This circuit produces the ticking of a clock on a common piezoelectric transducer. The circuit has an...
This circuit is intended to limit the ringing time of a bell. Even if the button is kept pressed for...