Based on the Linear Technology LTC2054, this -48 V circuit was found in a 2005 manual. The circuit is powered with 5 V and can be used as a shield.
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...
The circuit is from a 1978 publication and the transistor may be the BC558. The transformer is...
This simple unregulated circuit was found in a Radio Electronics from June 1964. Note that the...