Using Maxim components, this circuit consists of a regulator to a boost converter. The circuit operates in the indicated voltage range. The MAX5160M consists of a digital potentiometer.
We found this circuit in an 80's Radio Shack publication. The circuit uses a company buzzer, but...
This circuit is an improvement of the previous circuit. An input resistor must be included...
This circuit produces a signal at a frequency of 455 kHz, based on a ceramic resonator CSA455E, by...