# What could this device be? [closed]

I was visiting a hotel and by accident found there is somekind of device under the sink.

It consisted of 2 parts that were connected wires.

I think it measures something, maybe temperature or similar. Any suggestions?

## closed as off-topic by Michael Karas, Leon Heller, Andy aka, nidhin, Matt YoungMar 26 '15 at 15:30

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – Michael Karas, Leon Heller, Andy aka, nidhin, Matt Young
If this question can be reworded to fit the rules in the help center, please edit the question.

• an led strip... – PlasmaHH Mar 26 '15 at 13:13
• Why not ask the hotel manager? – Michael Karas Mar 26 '15 at 13:16
• "it can do anything, it could be hero" – Pedro Quadros Mar 26 '15 at 13:48
• It's a lowish grade LED strip light. Designed to run at 12V nominal. Each section has 3 LEDs in series plus a resistor. Here R = 151 = 150 Ohms. If LEDS are nominal 3V each ILED = (12 - (3 x 3V))/15- = 3/150 = 20 mA which is typical LEd max If. At 15V VLED will rise to maybe 3.3V so I = (15 - 3.3x3)/150 ~~= 33 mA. \ In your large photo L19 20 21 and R7 at rh end are clear and show things well. When posting pictures like this and you have a nice large original image then showing a crop of the sharp detail as at rh end helps heaps. – Russell McMahon Apr 10 '15 at 12:37
• See crop of your photo above – Russell McMahon Apr 10 '15 at 12:42

## 1 Answer

The white box is just a casing for some circuitry inside (probably a battery or some power supply).

The strip looks to be just an LED strip, it's purpose I have no idea but I imagine it is useful to someone. Ask management in the hotel if it is concerning you.

It might be something useful to maintenance - lighting up the underside of the sink to they can carry out repairs without having to hold a flashlight, but that is purely speculation so don't go with it.

• Maintenance? Whenever you need it, the batteries would be dead... I guess they took this room to make nice photos for their website/catalog and wanted to pimp them with some light from below the sink. May be, a look at their website will show it. – sweber Mar 26 '15 at 13:37
• @sweber Maybe there is a switch inside the plastic box that we cannot see! Yes that too could be the case. – MrPhooky Mar 26 '15 at 13:39