The circuit is from the 1977 National Semiconductor Audio Handbook. The bass and treble control is Baxandall type. The integrated circuit used is not common today.
This circuit generates a pulse of duration determined by the capacitor when an object interrupts the...
This circuit was obtained in an Electronic Design from the 90s. The circuit uses transistors from the...
This circuit is from an old Motorola manual (1999) using an integrated circuit that is not very...