I'm developing a simple project using a WEMOS D1 MINI NodeMCU to drive an rgb LED strip so I managed to use a 12V power source to drive the current to the 12V pin of the led strip, a STEP DOWN converter takes in the 12V and reduce it to an output of 5V, the problem is that if I connect the WEMOS via USB it ALWAYS load in the right way, but if I'm powering it via the 5V pin 95% of the time it fails to correctly startup requiring to press the reset button in order to solve the problen, but sometimes it doesn't solve the problem, anyone knows why? I'm powering it around 4.9-5.1V is it relevant should I reduce the Voltage or rising it?


I also posted the question here, just in case

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    Also asked at: electronics.stackexchange.com/q/359093 If you're going to do that then please be considerate enough to add links to the other places you cross posted. This will let us avoid wasting time due to duplicate effort and also help others who have the same questions and find your post to discover all the relevant information. – per1234 Mar 1 '18 at 10:38
  • You may want a power on reset delay to hold the board in reset until your power supply has stabilised. – Majenko Mar 1 '18 at 11:02
  • @Majenko thanks for the replay, can you show me how to achieve that? – FabioEnne Mar 1 '18 at 11:08
  • There are plenty of example circuits online if you ask Google. Best to use Google image search. – Majenko Mar 1 '18 at 11:21
  • What has this to do with NodeMCU? – gre_gor Mar 1 '18 at 17:12

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