This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent components. The transistors may be BC558 and the transformer is obtained from a disused transistor radio.
When you speak into the microphone of this circuit, the sound produced in the speaker resembles a robot...
The MC33064 can also be used on this circuit of Motorola's 1993 Linear Interface ICs. The circuit...
This circuit was found in a 1976 technical publication. It is possible to obtain an 11 dB gain in...