Found in American documentation, this circuit can be used as a shield. The technology is CMOS and the input is BDC. Next to the diagram formulas for calculating the components.
We find this circuit in a 2005 Linear Technology manual. The circuit applies to small DC motors...
This 12V battery charging circuit automatically shuts off at the end of the charge. The disconnect...
This is one of many Morse code audio oscillators that can be found in this section. The circuit...