So for a project i need a bit of help ,so i have blade at the start of my pcb ,the board is powered 24v
and, I need a circuit in which led is not glowing when fuse is intact and only glows when fuse is blown
please help me with this

 

Put the LED with resistor across the fuse. Unless the board draws very little current, it will light when the fuse is blown.

 

So for a project i need a bit of help ,so i have blade at the start of my pcb ,the board is powered 24v
and, I need a circuit in which led is not glowing when fuse is intact and only glows when fuse is blown
please help me with this

also when is fuse is blown the load will be completely disconnected from power source

 

Put the LED with resistor across the fuse. Unless the board draws very little current, it will light when the fuse is blown.

thats the problem its a high current consuming circuit

 

Place a led with suitable resistor on the high ohm side. across the fuse
Edit: I see already suggested!

 

Place a led with suitable resistor on the high ohm side.

can you help me with a diagram ,

 

Just connect a LED with suitable resistor in series. Wire the two across the two fuse terminals.
The current should be enough to light the LED without significant current carrying capability

 

also when is fuse is blown the load will be completely disconnected from power source

Not if you put an LED + resistor across it as two of us have suggested. The current will actually flow through the LED and through the load, but it will be a very small current that will not power the load.

Ever seen an old light switch that lights up when the switch is off? That works the same way.

 

Hello,

As the others said, a led AND resistor in series accross the fuse:

Bertus

 

Hello,

As the others said, a led AND resistor in series accross the fuse:
View attachment 297411
Bertus

Just confirm the polarity. Here, the current flow is Left to Right.

 

Hello. Show us the low side of your project.

 

Hello,

As the others said, a led AND resistor in series accross the fuse:
View attachment 297411
Bertus

Since the system voltage is given as 24 volts AC, there should also be a diode connected anti-parallel to the LED to prevent that maximum allowable revers voltage from being exceeded. The same resistor will limit current in the revers direction .

 

I don't see any reference to AC ??
Link ??
WERE it AC, then a simple 24v Neon across the fuse would suffice.

 

24 volt neon indicators are quite difficult to find. My suggestion will work with AC or DC.

 

They are all over the place, in many sources.
Surely the OP knows whether it is AC or DC ??

 

They are all over the place, in many sources.
Surely the OP knows whether it is AC or DC ??

View attachment 297543

Why does a DC pilot light have two black insulated leads??? My 120 volt AC neon devices have 2 black insulated leads, my DC LED pilot lights al have one red lead and one black lead.
Also, the TS asks about "An LED glowing" to indicate a failed fuse. So AC or DC my suggestion works. And the devices in the photo are not neon, but rather LEDs. I have seen them, we had a drawer full at one company. GREEN lenses with RED LRDs. They were not at all effective.

 

Since the system voltage is given as 24 volts AC,

I don't see that anywhere. Was it edited out?

ak

 

I don't see that anywhere. Was it edited out?

ak

It is at the end of the first line in post #1. No, it does not say AC, it does say 24 volts, though.

 

It is at the end of the first line in post #1. No, it does not say AC, it does say 24 volts, though.

In other words, it does not day AC anywhere. Do you think 24V implies AC?

 

And what's a blade at the end of his pcb?