Led Blown Ac Fuse Indicator Circuit Diagram

If you are looking for a led display for show ac line power.

Led blown ac fuse indicator circuit diagram.

When the fuse is intact it offers a low resistance and so the. If you are used this circuit with some circuit that uses a high quality led and changed r6 values to suitably with the lower current of the led. Two led lights lit indicate a blown fuse on an ac application. The fuse failure alarm with 2 led light that led display when the load is low resistance or short circuit fuse blow once.

First it shows ac main or the power grid. Fuse blown indicator circuit diagram with alarm in this circuit there are few basic components are used to make a indicator device that glow automatically after fuse blown. This blown fuse indicator will work with a wide range of ac supply voltages from 30v to 300v and good for use with few milliampere to many amperes fuse. Led blown ac fuse indicator circuit diagram.

This is ac line led indicator circuit that is compatible with the ac main power is 115 vac or 230 vac. Blown fuse indicator very easy follow us on. Starting from a very simple idea this blown fuse indicator circuit can be a very useful indicator for your electronic workshop. Second show load still hold the power or not.

Circuit description and working of blown fuse indicator. It illuminates led1 when the fuse blows. When the fuse blows a small current flows via the base emitter junctions of darlington. When the fuse is not blown positive voltage is applied at junction p ic s pins 2 and 6 through r2 and d1.

This circuit is based on 555 timer wired as an astable multivibrator. If there should be a wire break to the motor see diagram c. Don t touch any component when circuit is connected to the ac power. So the led is off.

The simplicity of this circuit using only two components but although with only a resistor and an led this circuit provides a visual indication of when a fuse has blown. This blown fuse indicator will work with a wide range of dc supply voltages from 5v to 50v. Led1 led2 show fuse state. This is done by just adding a resistor and led to the existing circuit.

Here is a simple scheme for adding a blown fuse indicator to your existing power supply circuit. The led and resistor are connected in series and this combination is connected in parallel to the existing fuse. This holds the voltage at the junction above 2 3 vcc and prevents the ic from oscillating. In the circuit diagram there are 2 leds for showing 2 status.