Your proposed circuit will work with any general-purpose diodes (1N4148 or 1N400X).I made a signal Tracer for audio circuits and I want to protect the input so I guess I can use back-to-back diodes from input of signal Tracer to ground and a resistor from there to the probe wire to the tested circuit right?
View attachment 153603
by Duane Benson
by Jake Hertz
by Duane Benson