This circuit is from Motorola's Linear Interface ICs of 1993. The circuit can be powered by symmetrical 6 to 12 V voltages and for a stereo version, two channels must be built.
This circuit was found in Philips documentation from 1967. The components are of the time, being...
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency...
This circuit uses an operational amplifier to modulate the light emitted by an LED with audio...