This circuit was found in a 73 magazine for radio amateurs from the 90s. The circuit uses high voltage transistors and the relay is high voltage as well.
This circuit was found in a 1983 Electronics Experimenters, but it can be easily assembled, since...
This circuit was found in Electronics Handbook, Vol XIII 1993 and consists of a simple direction...
This circuit was obtained from National Semiconductor's Linear Applications Handbook from 1994. The...