"Gould 0738" wrote in message
...


Isn't that the normal function of a diode?
Preventing the flow of current in one direction or another?


Yes, that is the normal function. A typical diode will have a voltage drop
of about 0.7 volts when current is flowing through it. If you put two of
these diodes in parallel, but facing opposite directions, then current will
flow either way but the voltage has to be above 0.7 volts.

Rod