This LM380-based circuit was found in documentation from the 1980s. The components are current, and the transistor may be a general-purpose equivalent. Note the use of a medium impedance speaker.
The original frequency of the Pierce Oscillator with bipolar transistor is given by the crystal, which...
The maximum current of this Motorola LDO is 1 A. The formula next to the diagram makes it possible to...
Found in older American documentation, this circuit can monitor 3 or more voltages determined by...