Led Blown Ac Fuse Indicator Circuit Diagram

2 ac line indicator circuit.

Led blown ac fuse indicator circuit diagram.

If there should be a wire break to the motor see diagram c. 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. When the fuse blows a small current flows via the base emitter junctions of darlington. With the fuse intact q1 is held off and there is no bias current available for the base of q2.

Blown fuse indicator very easy follow us on. If you are looking for a led display for show ac line power. The led and resistor are connected in series and this combination is connected in parallel to the existing fuse. This blown fuse indicator will work with a wide range of dc supply voltages from 5v to 50v.

So the led is off. When the fuse is intact it offers a low resistance and so the. This holds the voltage at the junction above 2 3 vcc and prevents the ic from oscillating. The fuse failure alarm with 2 led light that led display when the load is low resistance or short circuit fuse blow once.

Led1 led2 show fuse state. 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. First it shows ac main or the power grid. Here is a simple scheme for adding a blown fuse indicator to your existing power supply circuit.

When the fuse is not blown positive voltage is applied at junction p ic s pins 2 and 6 through r2 and d1. Circuit description and working of blown fuse indicator. This is done by just adding a resistor and led to the existing circuit. 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. In the circuit diagram there are 2 leds for showing 2 status. Led blown ac fuse indicator circuit diagram. Since ac is sinusoidal the led senses 1 2 of the sine wave and the other 1 2 causing both lights to be lit for a given ac circuit.

This is ac line led indicator circuit that is compatible with the ac main power is 115 vac or 230 vac. Starting from a very simple idea this blown fuse indicator circuit can be a very useful indicator for your electronic workshop. It illuminates led1 when the fuse blows. This circuit is based on 555 timer wired as an astable multivibrator.