The power transistors from this 1999 source must be mounted on excellent heat sinks. The circuit is suitable for supplying automotive devices up to 30 A. The 13.8 V output is set to P1.
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
This circuit, found in a 73 magazine for radio amateurs, is used in radio localization. The...
This circuit is from an American magazine Popular Electronics of March 1991. The circuit produces both...