This equalizer has automatic level control, being designed by Sanyo for cassette recorders and radio. The maximum supply voltage of the LA3210 is 15 V and the typical idle current of 1.4mA.
This very simple oscillator, with only one transistor, was found in a Japanese magazine in 1967....
This simple circuit can use any general-purpose transistor. The power supply must be isolated. The circuit...
The integrated circuit used in this application is uncommon today. The circuit converts...