How to turn Flashing LED into constantly glowing one

Question

So I have one detection circuit with LED that flashes continuously when something is detected (1-2 sec interval). That's a bit nerving while it happens when you drive, especially at night.

I don't have any option to view or modify the code, so it would be nice if I can "hack" this LED to glow continuously....can I do it somehow with some active components?

Tnx in advance

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I don't have any schematics of this thing. It is a Sensor device that detects when a car is in your "blind spot". So it blinks slowly when something comes in the zone, and rapidly if you put your turn light on....so that's basically a problem for a Cap while it will soften than all the impulses? right?

The LED is packed in a case where just two wires came out, so i need to look later onto the PCB to make it clear if it is with GND or Vcc regulated

And it is definitely a LED controlled with a micro controller

Answer 1

Assuming you have access to a constant voltage somehere, something like this could work:

^{simulate this circuit – Schematic created using CircuitLab}

Slow to turn off and probabaly overly complicated, but should work.

Answer 2

In principle, this is a job for a retriggerable monostable (CD4047 or 74HC123).

To avoid voltage level problems with sensing the LED voltage, you could use a photocell to sense the flashes; this then drives the monostable with its period somewhat longer than the flash period, and that drives another LED which stays on as long as the flashes continue.

Answer 3

ALTERNATIVE SOLUTION

That's a bit nerving while it happens when you drive, especially at night.

Surely that is the whole point of the LED, to be visibly irritating enough that you notice it BEFORE you change lanes. Making it stay on you may never even notice it till it is too late.

It seems to me your real issue here is not the flashing but rather the fact that it is too bright at night. As such, I'd recommend you don't mess with the functionality, but rather switch in a resistor or add a pot that lets you adjust the brightness at night.

If you have the ability, there may also be the possibility of wiring up some circuit that adjusts the brightness based on the ambient light, or ties into the existing dashboard lighting levels.