Motorola suggests this circuit in an 80's documentation. The circuit uses an inverter to produce a higher voltage for 9 V battery charge from a single cell.
This circuit was suggested by General Electric in 1970 documentation. It makes use of a photo-SCR...
Found in a Popular Electronics from the 90s, this circuit transforms an ordinary oscilloscope into a...
A stereo digital mixer using the 4053 is built as shown in figure bellow. The IC must be powered...