EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: _Wim_ on September 15, 2016, 06:54:31 pm
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Hi, probably many of you already know about these, but I just bought a small square LED ceiling light to put under a multilayer pcb to be able to follow the internal traces more easily (the area that is not covered by the pcb I cover with some paper so it is not too bright on the eyes). I comes with its own constant current source (300mA), but you can off course also power it from your lab power supply to make it adjustable. The can be found on Ebay for aprox 16€ including shipping from various sellers:
http://www.benl.ebay.be/itm/12W-Square-Ultra-Thin-LED-Panel-Ceiling-Light-Flat-Tile-White-30-x-30-x-1-2-cm-/351714691165?hash=item51e3d4485d:g:NvoAAOSwlfxXGaO6 (http://www.benl.ebay.be/itm/12W-Square-Ultra-Thin-LED-Panel-Ceiling-Light-Flat-Tile-White-30-x-30-x-1-2-cm-/351714691165?hash=item51e3d4485d:g:NvoAAOSwlfxXGaO6)
http://www.benl.ebay.be/itm/12W-Square-Ultra-Thin-LED-Panel-Ceiling-Light-Flat-Tile-White-30-x-30-x-1-2-cm-/131842231341?hash=item1eb268cc2d:g:GREAAOSwLnBXV~6t (http://www.benl.ebay.be/itm/12W-Square-Ultra-Thin-LED-Panel-Ceiling-Light-Flat-Tile-White-30-x-30-x-1-2-cm-/131842231341?hash=item1eb268cc2d:g:GREAAOSwLnBXV~6t)
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I have been running is for 1 hour now at full power, the white surface does not heat up at all (no leds underneath), and the sides heat up to around 40°C. The light is pretty uniform and sufficiently bright to see internal traces. So far quite satisfied with my purchase.