Fast Electronic Fuse

Posted on May 1, 2012

A fast electronic fuse designed to operate on 230V AC with an adjustable trip current. When the current through the load exceeds a level determined by the position of the wiper on the 1k wire-wound pot, this circuit cuts off the load immediately. If S1 is open, the range is approximately 300-650 mA, and 0.8-2A when it is closed.

Fast Electronic Fuse
Click here to download the full size of the above Circuit.

The key variable in the operation of the fuse is the voltage drop across the power resistor(s) which are connected in series with the load. This voltage drop is directly proportional to the current the load draws. When this current is low, the voltage acr

Leave Comment

characters left:

New Circuits



Popular Circuits

Low power temperature controller
Bit Bender
op amp Detect real overcurrent/short-circuits vs. current peaks
arduino Switch transistor with a low voltage and current
ldr engineer
555 timer Clap switch circuit electronic project
Low cost temperature data logger using PIC
A delay circuit using an operational amplifier