[sdiy] Voltage regs + diode drops.

[Dave Kendall]

Hi all.

Another one I can't find a good answer to....

Is there any good reason not to use diodes in series after the output 
terminal of a positive voltage regulator to get odd voltages, eg. 2 x 
1N4001 after a LM7809 to get just below +8V?

It seems it *should* work, but I haven't seen it done anywhere yet. Are 
there any potential problems that anyone can think of?
FWIW, It would be for a CMOS logic circuit, and with a single OP-amp or 
transistor level shifter on the output.

cheers,
Dave