The starter circuit shown in the figure was found in an old European documentation. The circuit makes use of an SCR which is still common and the diac can be of any type.
August 2017 - Mouser Electronics is supplying Vishay's new high-speed, high-sensitivity...
This circuit shows how to add a 1st regulator to a source that already has a step for this...
This circuit is from a Maxim manual and can be used to power shields from batteries. The circuit...