This circuit was found in a 90's EDN. The circuit provides two 15 V outputs and one 5 V output from the 12V voltage of a car battery. The components are from that time.
This circuit was found in a 90s American documentation from the 90s. The components are from that...
The search coil of this detector consists of 140 turns of wire 18 in an 8 inch diameter form. The...
This circuit was found in a Popular Electronics from the 90s. Transistors admit equivalents, as well as...