AD converter with LCD display (CB9025E)

This circuit was obtained in Teledyne documentation from the 70s. The converter component is uncommon today.

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Bell Sound (CB1492E)
This circuit generates the sound of bells. We found it in a 1977 Radio Shack publication. The...
The Transistor as Switch (CB922E)
This circuit can be used as shield or to drive powerful loads from low current switches such as...
PUT Battery Charger (CB4256E)
We find this automatic battery charger in an 80s ON Semiconductor circuit and application manual. Bridge...