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.

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

enter image description here


closed as off-topic by Michael Karas, Leon Heller, Andy aka, nidhin, Matt Young Mar 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
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  • 3
    \$\begingroup\$ an led strip... \$\endgroup\$ – PlasmaHH Mar 26 '15 at 13:13
  • \$\begingroup\$ Why not ask the hotel manager? \$\endgroup\$ – Michael Karas Mar 26 '15 at 13:16
  • \$\begingroup\$ "it can do anything, it could be hero" \$\endgroup\$ – Pedro Quadros Mar 26 '15 at 13:48
  • \$\begingroup\$ 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. \$\endgroup\$ – Russell McMahon Apr 10 '15 at 12:37
  • \$\begingroup\$ See crop of your photo above \$\endgroup\$ – Russell McMahon Apr 10 '15 at 12:42

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.

  • 2
    \$\begingroup\$ 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. \$\endgroup\$ – sweber Mar 26 '15 at 13:37
  • \$\begingroup\$ @sweber Maybe there is a switch inside the plastic box that we cannot see! Yes that too could be the case. \$\endgroup\$ – MrPhooky Mar 26 '15 at 13:39

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