18V photo switch

[Anthony5]

That is what I need. I know there are 12V and 24V switches, but not sure if they will work on any other voltage than that.

 

So if not, is easily possible to modify one of the above to work one 18V, and if so should i get the 12 or the 24V one?

[Crossy]

In reality either would probably work on 18V, but the thresholds could be awry, it may never trip or turn off

 

If you are an electronics engineer it should be reasonably easy to modify a commercial unit so it works properly on 18V.

 

What's your application?

 

EDIT Oddly enough I would be tempted to start with a mains unit and modify that :)

 

[Anthony5]

2 minutes ago, Crossy said:

In reality either would probably work on 18V, but the thresholds could be awry, it may never trip or turn off

 

If you are an electronics engineer it should be reasonably easy to modify a commercial unit so it works properly on 18V.

 

What's your application?

 

 

 

 

The application is for the 12/24V perimeter wall lights from the other thread, and the working voltage is actually 19V

 

As I said in that thread I have a 19V transformer that already supplies the infrared beams and wanted to add the lights to it.

 

I forgot that the beams need 24/7 power supply, while the lights only need at night of course, so the only way is place a photo switch at the output of the transformer.

[Crossy]

Try a 24V one.

 

[Anthony5]

20 minutes ago, Crossy said:

 

EDIT Oddly enough I would be tempted to start with a mains unit and modify that :)

 

I currently have one of these installed in 220V, and I have also a tv repair guy who speaks English, which I guess that's what you mean with electronics engineer.

 

Should I take the 220V one to him or better get a 24V to modify?

 

[Crossy]

A 24V will likely work out of the box (20% under volts), without a diagram I couldn't be totally certain.

 

OR

 

You could isolate the relay connections in a 220V unit and use that to switch your 19V. That would be guaranteed to work but would still need 220V to power the electronics.

 

EDIT A 'real' electronics engineer would likely not be fixing TV sets, he would be designing TV sets.