This interesting circuit was found on the Internet and is based on the 555. The circuit uses power MOSFETs that determine its output. No information about the transformer was provided.
Found in Popular Electronics from the 90's, this circuit makes use of common components today. |...
This circuit has visual and audible status indication using an oscillator. The circuit is from a...
The circuit shown is from Motorola's Linear Databook published in 1990. As the CI is uncommon...