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I have this LED light which started blinking under some use. So, I desoldered the SMD LED component and hooked it up to a variable power supply. When I apply 6V, the LED starts to emit a little bit of light as expected. But, as I ramp up the voltage to around 7 volts, it starts blinking and as I increase the voltage further, it stays off more. At 12 volts, it becomes just random flashes. WHat could be causing this?

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    \$\begingroup\$ Did you put a resistor in series with the LED, or just apply a constant voltage with no current limiting? In the latter case -- that's called component abuse. \$\endgroup\$ – calcium3000 Jan 30 at 18:10
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    \$\begingroup\$ please add images \$\endgroup\$ – Satish Singupuram Jan 30 at 18:13
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    \$\begingroup\$ Please update your answer with complete information. What LED are you using? Pictures wouldn't hurt either. I don't know of many 12V SMD LEDs. \$\endgroup\$ – HavocRC Jan 30 at 18:20
  • \$\begingroup\$ There are plenty of LEDs with built in resistors, but I have not seen this in SMD packages. Are you sure it's SMD? Assuming it's a T1 or the like than it's most likely flashing due to a thermal fault ….as the LED/resistor heats up it breaks the circuit when it cools down it reconnects. The higher the voltage you hit it with the higher the current and heat ...so it stays off longer. \$\endgroup\$ – Jack Creasey Jan 30 at 19:07
  • \$\begingroup\$ Power supply overcurrent hickups? \$\endgroup\$ – Unimportant Jan 30 at 19:44

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