5V boost converter smoked on first use
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I have purchased some of the recommended 5V boost boards at https://www.ebay.com/itm/DC-DC-Boost-Converter-Module-Step-Up-Module-1-5V-to-5V-500mA-for-phone-MP4-MP3/381185956688.
As soon as I have applied approx 4VDC at the input (no load) the board my PSU has hit the current limit. No wanting to give up so easily I then tried an 18650, which produces some nice smoke.
faulty board or operator error?
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@grumpazoid I'd say operator error if you connected the power supply incorrectly, faulty board if you connected the power supply correctly
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It's difficult to say with so little information.
Do you have a picture of the board?
How did you wire things up exactly? Are you sure you didn't reverse polarity? Perhaps you're sot supposed to run these without a load?
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I was wondering about the no load.
I've just carried our some further investigation . It looks like C3 that is connected between ground and 5V O/P has been shorted out with solder. I guess this would exceed the 500mA specified ;).
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This post is deleted!
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This seems that E50D might be same as CE8301, but somehow they use a smaller cap, maybe to save money, try to replace C3 with a 100uf 16V electrolyte capacitor
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@bjacobse Thanks. In the end i removed the solder that was shorting out the capacitor and it now outputs 5V. Not sure how safe it is after the overheat
As an experiment I cut the track to take the LED out the circuit. This reduced the current from 2mA down to a few uA.
