For low-frequency signals, this circuit transforms a single oscilloscope into a dual-trace. The circuit is from Radio Electronics magazine, October 1984.
This circuit was obtained from an American documentation from the 1980s. The T1 triggering...
Found in a 1974 Ferranti manual, this circuit uses diodes to limit the voltage on the transistors. The...
This circuit is from an English publication of 1991. With it you can use a common multimeter on...