Found in Electronics Now from the 1980s, this amplifier can also be seen in commercial amplifiers of the time. The integrated used is uncommon nowadays. The power is 33 W.
Found in a 90's EDN, this circuit changes the phase of a signal from 50 to 60 Hz in 120 degrees. The...
The LM320 is a negative voltage regulator up to 15 V with maximum current of 1 A. In this circuit we...
This circuit was found in a 1967 Philips documentation. The circuit fires when light stops hitting the...