Dc Over Voltage Protection Circuit. The circuit has a few components it is very easy to build and will protect your electric equipment againg overvoltages. Keep in mind that this is a generic circuit describing the protection method.
The crowbar circuit must be mounted between power supply and the protected device. Keep in mind that this is a generic circuit describing the protection method. In this project we will build a simple yet effective overvoltage protection circuit using a fuse and a zener diode as the protecting elements that will work for electronics that operate with dc voltage.
Simple over and under voltage protection circuit from the circuit when the voltage is 220 volts ac through a transformer t1.
Circuit above will protect your circuit device at vo by blowing the fuse in case of an over voltage condition. Circuit diagram for overvoltage protection using zener voltage regulator circuit is given below. If you use this circuit for autocut on over 6v then use 6 v relay and circuit need 6v. The circuit has a few components it is very easy to build and will protect your electric equipment againg overvoltages.
