i need help i cant find anything

[andrew62801]

hello i dont know if any buddy can help me but i need to know how to make a dc voltage regulator that doesnt allow any voltage threw until it hits 11 volts but doesnt go threw over 13 volts

[MrAl]

Hi,

Your best bet is probably to use a transistor on the output to enable the voltage once it
gets up to 12.000v and not until then. You'll need a low Vsat transistor like with Vsat
equal to about 0.1v or less or a MOSFET with low Ron like 0.050 ohms or less.
Zetex makes very low Vsat bipolars.