1E)
This circuit was found in a Popular Electronics from the 90s. The circuit generates different control signals over the same line. The transistors are from the era.
This circuit was found in a September 1982 Radio Electronics magazine. It was the type commonly used...
This amplifier for distributing audio signals appears in other articles on this website and even...
Many reed switches can be wired in series to perform na efficient alarm as shoen in the figure....