Found in a documentation from the 90's, this circuit uses only one integrated circuit. The resistors in series with the LEDs depend on the power that can be between 5 and 12 V.
This circuit is from a 2005 Linear Technology application manual. The circuit has an on-off...
This circuit was obtained in an Electronque Loisirs magazine from France, in a July 1991 edition. It...
Found elsewhere in this section, this circuit produces an output voltage approximately twice that...