Guest xerxel Posted September 28, 2013 Report Share Posted September 28, 2013 Is that right?I purchased an LED light with a remote control and in a momentary lapse of concentration, mis-read the input voltage and connected 240v instead of 12v!The actual board with the colour changing LED and IR sensor is working fine when 12v is applied directly across it but in between the power supply and main board is this other little board shown in the photos with a big capacitor and tiny coil and some resistors. I was thinking this either corrects an incorrect input voltage or is used to avoid sudden spikes and surges.Does any one recognise this little component and could anyone suggest an alternative otherwise I will have to bin the entire light housing, working main board etc and buy a whole new unit! >:(Thanks in advance! :) Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 28, 2013 Report Share Posted September 28, 2013 The little circuit board is probably a switched-mode step-down power supply. 12V input efficiently gives 2V or 3V to the LED and it is destroyed. Quote Link to comment Share on other sites More sharing options...
Guest xerxel Posted September 28, 2013 Report Share Posted September 28, 2013 OK - so if I connect a power supply across the main board, skipping this board and step it up in increments of 1v I should get to about 3v where the whole thing works and then just use a 3v power supply going forward and forget about this little extra board which I blew up altogether. Is that right? If so, that is much easier. Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 29, 2013 Report Share Posted September 29, 2013 You said that the main board works fine when powered from 12V. Then use 12V.But I think the main board will blow up when powered from 12V.We do not know how much voltage and current the little blown up board gave to the main board. Quote Link to comment Share on other sites More sharing options...
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