/diy/ - Do It Yourself

>>801820
>Can I stack my one 12V zener diode with three normal diodes (forward biased) to achieve 15V?

you'll get a 13.8V zener and the zener action will be a little mushy (not as sharp) as with just a zener, but yeah.....

another way to do this is with a power transistor. see pic. say you wanted to limit a voltage to 15V but only had a 12V zener. you'd arrange the voltage divider to provide 12.6V at the junction, so the transistor would turn on and short out any voltage above 15V on the collector.